Managing changes to a directory of electronic documents

Information

  • Patent Grant
  • 6675161
  • Patent Number
    6,675,161
  • Date Filed
    Tuesday, May 4, 1999
    25 years ago
  • Date Issued
    Tuesday, January 6, 2004
    20 years ago
  • Inventors
  • Original Assignees
  • Examiners
    • Homere; Jean R.
    • Wassum; Luke S
    Agents
    • Bingham; Marcel K.
    • Hickman Palermo Truong & Becker LLP
Abstract
A method and apparatus are provided for managing changes to a directory of electronic documents. A custom directory is created and stored based on the contents of a master directory. The master directory comprises a taxonomy of categories. A plurality of electronic documents are classified in one or more of the categories. One or more mappings defines how the documents of categories of the master directory map to categories of the custom directory. Mappings may express merges or splits of categories. One or more judgements may be created and stored in the custom directory in association with documents in the categories of the custom directory. Each judgement expresses whether a document is in or not in a category, or locked out of all categories. Modifications to the master directory are automatically propagated to the custom directory, according to the mapping, but without overriding the judgements in the custom directory.
Description




FIELD OF THE INVENTION




The present invention generally relates to data processing. The invention relates more specifically to managing directories of electronic documents that are used, for example, in a large hypertext document system.




BACKGROUND OF THE INVENTION




Hypertext systems are widely used. One particular hypertext system, the World Wide Web (“Web”), provides global access over public packet-switched networks to a large number of hypertext documents. The Web has grown to contain a staggering number of documents, and the number of documents continues to increase. The Web has been estimated to contain several hundred million pages and is expected to expand rapidly over the foreseeable future.




The number of documents available through the Web is so large that to use the Web in a practical way almost always requires a search service, search engine, or similar service. The search engines use “spider” programs that “crawl” to Web servers around the world, locate documents, index the documents, and follow hyperlinks in those documents to yet other documents. In one mode of operation, a user provides a search query to the search engine, which locates information in the index about responsive documents and displays a set of search results that satisfy the query.




In another mode of operation, the index may be organized in the form of a hierarchical directory that is structured using a taxonomy of categories. The search engine displays a top-level set of categories from the taxonomy. Each category is hyperlinked to one or more subordinate categories that are associated with that category. Each category may also be associated with one or more documents that fall within that category. In that case, the search engine also displays a list of the documents. A user may browse the taxonomy and the underlying directory by selecting successive categories until a category of interest is reached, or may select a document associated with a particular category. This mode of operation is available using the search engine “Disney's Internet Guide” (DIG), which is accessible online at www.dig.com.




In this field, separate enterprises or companies may own and operate the search engine and the technology that is used to create and manage the underlying directory (the “master directory” ). Different search engine operators may wish to provide a taxonomy to their end users that is different from the standard taxonomy that is reflected by the master directory. Also, various search engine operators may wish to classify a particular document in a category that is different from that in which it is classified in the master directory. Thus, there is a need to enable different search engine operators to establish different, customized underlying directories.




A search engine operator with a customized directory, however, normally will still want to receive updates to the master directory issued by the owner of the directory technology. Thus, there is a need to integrate the updates into the customized directory in a way that does not override or disrupt the customizations that are reflected in the customized directory.




There is also a need for a system or mechanism that provides a convenient way to create and store a custom directory based on a master directory, in which the custom directory has a custom taxonomy that is different from the taxonomy of the master directory.




There is also a need for such as system or mechanism in which the custom taxonomy classifies documents in different categories or according to custom judgements that differ from or conflict with corresponding judgements in the master directory.




There is also a need to integrate the updates into the customized directory in a way that does not override or disrupt the custom judgements that are reflected in the customized directory.




SUMMARY OF THE INVENTION




The foregoing needs and objects, and other needs and objects that will become apparent from the following description, are achieved by the present invention, which comprises, in one aspect, a method of managing changes to a directory of electronic documents, comprising the steps of creating and storing a first directory of the electronic documents having a hierarchy of one or more categories into which one or more of the electronic documents are classified; creating and storing a second directory that is based on the first directory, one or more customizations that represent differences between hierarchies of the first directory and the second directory, and one or more judgements that represent whether one or more of the electronic documents are properly classified in the categories; modifying the first directory by changes to one or more of the categories; and automatically propagating the changes to the second directory, without modifying the customizations or the judgements, to thereby create and store a modified second directory.




One feature of the invention involves creating and storing the first directory of the electronic documents that is defined by a hierarchy of one or more categories into which one or more of the electronic documents are classified and by one or more master judgements that represent whether one or more of the electronic documents are properly classified in the categories; modifying the first directory by changes to one or more of the master judgements; and automatically propagating the changes to the second directory, without modifying the customizations or the judgements, to thereby create and store a modified second directory.




Another feature relates to creating and storing one or more judgements of the second directory by the steps of displaying a taxonomy of categories of the second directory; receiving a selection of one of the categories; displaying one or more judgements associated with one of the electronic documents in the selected category; and receiving and storing a quality value that defines how closely the one of the electronic documents matches the selected category. In another feature, creating and storing the second directory includes creating and storing the second directory based on the first directory and one or more customizations that reflect a merge of a plurality of the categories of the first directory to one of the categories of the second directory.




According to another feature, creating and storing the second directory includes the step of creating and storing the second directory based on the first directory and one or more customizations that reflect a split of one of the categories of the first directory into a plurality of the categories of the second directory. A related feature involves creating and storing a new judgement in the second directory, wherein the new judgement indicates that a particular electronic document is in one of the categories of the second directory. Another feature is that the new judgement indicates that a particular electronic document is not in one of the categories of the second directory. Still another feature is that the new judgement indicates that a particular electronic document is locked out of all categories of the second directory.




In another feature, the method comprises marking the new judgement as un-reviewed; and receiving an acceptance signal indicating that the new judgement is accepted, and in response thereto, persistently storing the new judgement in the second directory. A related feature involves receiving a rejection signal indicating that the new judgement is rejected, and in response thereto, modifying the new judgement to indicate that the electronic document is not in the category.




According to still another feature, the method includes integrating the customizations and judgements into the second directory by identifying in the customizations to the first directory, each mapping of a source category of the first directory to a destination category of the second directory; copying each judgement that is in the source category to the destination category; and marking as un-reviewed, each judgement that is copied to the destination category and that originates from a split mapping of the source category.




In another feature, the method marks as un-reviewed, each judgement that is copied to the destination category and that originates from an un-reviewed judgement in the source category.




According to another feature, the method further comprises the step of creating and storing one or more custom judgements that are associated with the second directory, wherein the custom judgements have a judgement type value selected from among “in category,” “not in category,” “exclude from all categories”, and “undo exclude from all categories”; and integrating each of the custom judgements into the second directory by overriding any conflicting judgement originating from the first directory. A related feature is that the integrating is carried out such that: judgements of lower priority cannot affect earlier judgements of higher priority; “in” judgements override previous “in” and “not in” judgements; “not in” judgements override previous “in” and “not in” judgements; “exclude from all categories” judgements override previous “in” judgements; and “undo exclude from all categories” judgements override previous “exclude from all categories” judgements.




The invention also encompasses an apparatus and a computer-readable medium that may be configured to implement the foregoing.











BRIEF DESCRIPTION OF THE DRAWINGS




The present invention is illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar elements and in which:





FIG. 1A

is a block diagram of a search engine system;





FIG. 1B

is a block diagram of a search engine system that supports creation of a customized directory;





FIG. 2A

is a block diagram of judgement functions that may be provided by a directory;





FIG. 2B

is a block diagram of taxonomy mapping functions that may be provided by a directory;





FIG. 2C

is a block diagram of exemplary mappings of categories of taxonomies;





FIG. 3A

is an example of a portion of a display window that includes a category taxonomy;





FIG. 3B

is a diagram of a screen display that is displayed by a directory in response to selection of a category review function;





FIG. 3C

is a diagram of a display window that may be generated by a directory in connection with a document review function;





FIG. 3D

is a diagram of a window showing an example of a category display that may be generated by a directory;





FIG. 4A

is a diagram of a display window that may be generated by a directory in response to selection of a custom taxonomy for editing or re-mapping;





FIG. 4B

is a block diagram of data representation elements that may be used in an embodiment;





FIG. 5

is a flow diagram of an embodiment of a method of populating a custom directory; and





FIG. 6

is a block diagram of a computer system hardware arrangement that may be used to implement aspects of an embodiment.











DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT




A method and apparatus for managing changes to a directory of electronic documents is described. In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to avoid unnecessarily obscuring the present invention.




In still other instances, certain specific terms are used by way of example, but the invention or any particular embodiment is not limited to implementation using structures or functions that are identified by such specific terms. For example, in the following discussion it proves convenient to use the term Universal Resource Locator (URL) to refer to an identifier of an electronic document. However, any identifier of any kind of electronic document may be used, including file names, abstract names, numbers, etc., represented in computer memory or data structures, and the equivalents of any of the foregoing.




OPERATIONAL CONTEXT




An embodiment of the invention may be implemented in the context of a search-and-retrieval system for electronic documents. The preferred embodiment is implemented in the context of a search engine system that forms a part of the World Wide Web.




A search engine may operate in conjunction with a cache. Generally, a Web cache is a software system that attempts to deliver recently visited Web pages from a high-speed memory storage area rather than from the original source of the Web pages, which may be slow, unavailable, or distant. An example of a carrier-class Web cache is Traffic Server, which is commercially available from Inktomi Corporation, San Mateo, Calif. Traffic Server currently is in commercial use by America Online (AOL), which is the largest Internet Service Provider (ISP) in the world.





FIG. 1A

is a block diagram of the general architecture of a hypertext document cache system. Client


100


, which is an end station of a network such as a workstation or personal computer, executes a browser


102


. The browser


102


is a software element that can request hypertext documents from a server, interpret the source language in which the hypertext documents are encoded, and display the hypertext documents. Examples of commercial products that are suitable for use as browser


102


are Netscape Navigator and Microsoft Internet Explorer. Browser


102


is logically coupled to network


104


, which may be a local area network (LAN), wide area network (WAN), an internetwork, or a plurality of any of the foregoing. An origin server


120


, which manages a master copy of a hypertext document


121


, is coupled to network


104


logically opposite from the network.




Proxy server


106


is also coupled to the network


104


and is logically addressable through the network. A cache server


108


is coupled to proxy server


106


. Cache server


108


may comprise a cache engine


116


coupled to a directory


114


and a cache


110


. Cache server


108


generates a log


112


during its operation. Proxy server


106


and cache server


108


may be co-located, for example, at a computing facility of an ISP. The cache server


108


may be implemented using the Traffic Server product identified above.




In operation, browser


102


executes at client


100


. A user of the client


100


, or an agent executing in the client, generates a request to retrieve a hypertext document according to a particular location identifier. For example, a Web browser of the client may request a Web document using its URL, such as “www.inktomi.com”. Browser


102


submits the request to network


104


. Using a domain name service or similar network element, network


104


determines the location of the origin server


120


that contains the requested document. The origin server


120


redirects all incoming requests for hypertext documents to the proxy server


106


. Proxy server


106


redirects all incoming requests to the cache server


108


. The cache server


108


determines whether the requested document is in the cache


110


. If it is, the cache server


108


delivers the requested document to the browser


102


from the cache


110


. Thus, normally, all Web traffic directed at origin server


120


passes through the cache server


108


.




As part of its normal operation, the cache creates and stores one or more logs, including log


112


, which contain a record for each document request. Each log may be implemented as a file stored in a file system on a non-volatile storage file, a list in memory, or any other appropriate data structure or information storage mechanism.




MASTER DIRECTORY AND CUSTOMIZED DIRECTORY




Directory


114


is an index of the documents in the cache


110


. Alternatively, directory


114


indexes all documents that are available using network


104


. Directory


114


may be organized according to a taxonomy of categories that classify electronic documents by subject matter, technical field, etc. An example of a commercial search engine that supports a directory-driven search is the DIG search engine.




The “home page” of the DIG search engine comprises a top-level list of document categories such as “Animals & the Outdoors,” “News & the World,” “Games & Toys,” and others. Each category is represented by a text label that is a hyperlink. When a category is selected, a subordinate list of categories is displayed, in which each sub-category is also a hyperlink. For example, selecting category “Animals & the Outdoors” generates a display of the form shown in Table 1.












TABLE 1









SUB-CATEGORY DIRECTORY DISPLAY






Category: Animals & the Outdoors


























Aquatic Life




Frogs







Beaches




Gardening







Bears




Hiking







Big Cats




Horses







Birds




Mammals







Boating




National Parks







Bugs




Pets







Camping




Primates








Reptiles







Cats




Scouting








Strange Mammals







Dogs




Zoos







Endangered Species







Farm Animals















Each sub-category comprises a text label, which is a hyperlink, followed by a parenthetical value that identifies the number of documents contained within that sub-category. When a lowest-level category is reached, a list of documents within that category is displayed, as shown in Table 2.












TABLE 2









DOCUMENT LIST

























1.







http://www.barbados.org/beachimg.htmhttp://www.barbados.org/beachimg.htm







Barbados beaches - the beaches photo gallery







Photo Gallery of beautiful Barbados beaches. Discover the golden sand beaches of











this Caribbean island!













Category :Animals and the Outdoors:Beaches







2.







http://www.sunsets.com/beaches.htmhttp://www.sunsets.com/beaches.htm







Beaches on Ontario's Lake Huron Shoreline







Lake Huron Shoreline Beaches. Lake Huron, Bruce County, Ontario, Canada. Check











out our spectacular beaches in Kincardine, Port Elgin, Southampton, Sauble Beach and






Paisley!













Category :Animals and the Outdoors:Beaches















Each document in the list includes a hypertext link to the online site of the enterprise that owns the origin copy of the document.




The information in the foregoing displays is derived by the search engine from a master directory of electronic documents that is created, stored, and executed on one or more servers that are associated with the search engine. The master directory comprises a plurality of nodes organized in the form of a hierarchical tree. Each node of the tree represents a category and zero or more electronic documents that are associated with that category. Each node stores: the name of the category associated with the node; a node identifier uniquely associated with the node; a list of one or more subordinate node identifiers that are located below the current category; and a list of one or more document identifiers of electronic documents within the category represented by the current node.




Electronic documents are assigned to categories and nodes in an offline operation, before the directory is available to the search engine. In one embodiment, the master directory is created and populated with electronic documents based on the results of a Web crawler. The owner or operator of the master directory uses a crawler program to continuously re-crawl the Word Wide Web. References to new documents are stored in a list of unclassified documents. Periodically, the list of unclassified documents is scanned, judgements are made about the content of the documents, and the unclassified documents are assigned to categories. Assignment of a document to a category may involve creating a new category in the directory. This process may be carried out by manual scanning and review of the unclassified documents, or by an automatic review process. This process maintains the freshness and quality of the directory.





FIG. 1B

is a block diagram of a search engine system that further comprises a directory server


120


that hosts a master directory


122


, a custom directory


126


, and a directory application


124


. Master directory


122


is a reference version of a directory and may be created by the owner or operator of a search service. Custom directory


126


has the same general structure as the master directory. The structure of customized directory


126


, however, is defined by information defining a mapping of one or more nodes of the master directory to one or more nodes of the customized directory, and by information defining one or more judgements about electronic documents in the directory.




Directory application


124


is used to define and create custom directory


126


based on master directory


122


. Periodically, when custom directory


126


is completed and is ready for online, “live” production use, custom directory


126


may be loaded into cache server


108


by directory loader


118


. This process ensures that custom directory


126


is edited offline and made available for live use in an orderly manner.




Master directory


122


and custom directory


126


each may comprise one or more database tables and a database server. Alternatively, master directory


122


and custom directory


126


may access a common database server. What is important is that master directory


122


and custom directory


126


have access to an organized, persistent storage location for the information that resides within the directories.




DIRECTORY APPLICATION




In one embodiment, custom directory


126


is defined using an administrative client


116


that executes a browser


102


. Directory application


124


is a software element that may be executed by administrative client


116


. In the preferred embodiment, directory application


124


is a Java® program that is communicated from directory server


120


to administrative client


116


. A Java virtual machine integrated into browser


102


may execute directory application


124


. A description of the Java programming language and its uses appears in Arnold & Gosling, “The Java Programming Language” (Reading, Mass.: Addison-Wesley Pub. Co., 1996), and wwwjava.sun.com. Further information on the use of computer program code to implement an embodiment is given below in the section entitled “Hardware Overview.”





FIG. 2A

is a block diagram of functions that may be provided by directory application


124


. To gain access to substantive functions of directory application


124


, a user is required to log in, as indicated by login function


202


. The login function


202


may involve prompting a user for a unique user name and password, and validating the received values against a database of authentic values.




Substantive functions of directory application


124


include a Review Judgements function


204


and a Re-map Taxonomies function


206


. Directory application


124


may display a top-level menu that contains graphical buttons associated with the substantive functions. To activate a function, a user selects the graphical button associated with that function.




PROCESSING JUDGEMENTS




The Review Judgements function


204


provides a way to create, modify, or delete information relating to one or more electronic documents that are indexed in a particular category of the customized directory


126


. This information is called a “judgement” because it reflects a subjective decision by the owner or operator of the customized directory about whether a particular document falls within a particular category.




In the preferred embodiment, each category is a list of electronic documents that are identified by document identifiers, such as Universal Resource Locators (URLs). The owner or operator can manually remove or reorder one or more document identifiers. The owner or operator can add document identifiers for documents that are not present in the master directory. The owner or operator may change attributes that are associated with an electronic document. For example, the owner or operator may change the rankings associated with a particular electronic document so that the document will appear lower in a list of results from the search engine. An attribute may reflect the relevance of a particular document to a particular category, and thus serves as an indication of quality or confidence that the document actually falls in that category.




Each judgement has a judgement type. Valid judgement types include IN, NOT_IN, LOCK_OUT, and NEGATE_LOCK_OUT. The judgement type IN indicates that a document is in the current category. The judgement type NOT_IN indicates that a document is not in the current category. The judgement type LOCK_OUT indicates that a document is not in any category and effectively excludes the document from the custom directory. The judgement type NEGATE_LOCK_OUT is used to “undo” a document that has been locked out.




There can be many judgements for one document. For example, one electronic document could be classified in 10 categories and would have 10 corresponding IN judgements.




Each judgement is defined by stored information. For example, the custom directory


126


may comprise a file or database table of judgement records. Each judgement record may store information identifying who created the record; information identifying when the record was made; an identifier of a source node in the customized directory; an identifier of a document in that node; and a flag indicating whether that document is in the node or not in the node.




A priority value may be stored in association with each judgement. A judgement created by the owner or operator of master directory


122


may have one pre-determined priority value. A judgement created by the owner or operator of custom directory


126


may have a different, higher priority value. Higher priorities override lower priorities. Therefore, within the custom directory


126


, judgements created by the owner or operator of the custom directory will override judgements associated with the master directory when documents are mapped from the master directory to the custom directory. Within the master directory, the conflicting judgements that have been overridden are not affected.




Use of priority values in combination with the judgement type of “not in this category” provides a useful way to exclude a class of content from the custom directory


126


. For example, assume that the master directory


122


includes electronic documents that include adult-oriented content. Assume further that the owner or creator of the custom directory


126


wishes to exclude all adult-oriented content from the custom directory. A user may select a category of the master directory


122


that contains such documents and create a judgement that each document of that category is not in any category of the custom directory


126


. Because each such judgement is created by a user of the custom directory


126


, each such judgement has a higher priority value than any conflicting judgement in the master directory. Accordingly, the user's judgements will override the judgements in the master directory, effectively removing all adult-oriented content from the custom directory


126


.




When the Review Judgements function


204


is selected, directory application


124


provides two sub-functions, namely Administer Judgements function


208


and Review Judgements function


210


.




Administer Judgements function


208


enables a user to carry out miscellaneous administrative functions relating to judgements. For example, an administrative user can set permissions of other users by designating which users can modify judgements. In the preferred embodiment, each user is classified according to one of three access levels. The first access level provides read-only access to judgements. The second level provides read/write access to judgements. The third level provides read/write access to judgements and administrative privileges. In an alternate embodiments, each access level also may be set for each category as well as each user. For example, there might be one user who is authorized to modify judgements only for the Travel category and all its sub-categories, another user who exclusively handles the Business category, etc.




When the Review Judgements function


210


is selected, directory application


124


displays a list of judgement collections that have been created and stored. Preferably, the list is displayed in the form of a pull-down menu that is labeled with a unique number and name for each judgement collection. A user may proceed to substantive judgement review functions by selecting one of the judgement collections. Substantive judgement review functions associated with the Review Judgements function


210


may include a Browse Categories sub-function


212


, Review Category sub-function


214


, and Review URL sub-function


216


.




BROWSE CATEGORIES SUB-FUNCTION




The Browse Categories sub-function


212


provides a rapid way for a user to review the structure of the current taxonomy of categories of custom directory


126


. When the Browse Categories sub-function


212


is selected, directory application


124


displays a list of categories that are currently stored in the custom directory


126


. Preferably, indentation or tabulation is used to indicate the hierarchical relationship of the taxonomy.





FIG. 3A

is an example of a portion of a display window


300


that includes a category taxonomy


308


. Window


300


comprises a Browse Categories tab


302


, Review Category tab


304


, and Review URL tab


306


, which correspond to Browse Categories sub-function


212


, Review Category sub-function


214


, and Review URL sub-function


216


, respectively. A sub-function may be activated by selecting the corresponding tab.




The taxonomy


308


is a hierarchical list of one or more categories


308




a


,


308




b


,


308




c


, etc. There may be any number of categories. Each category further includes an expansion icon


316


, a folder icon


318


, and an alphanumeric name. The expansion icon


316


indicates whether the corresponding category is displayed in expanded form, with all its child categories shown, or collapsed with all its child categories hidden. When a category is expanded, the expansion icon is displayed in expanded form, as indicated by expansion icon


316




a


. When a category is collapsed, the expansion icon is displayed in collapsed form, as indicated by expansion icon


316




b.






Folder icon


318


is synonymous with the associated category. The folder icons provide a convenient way for a user to re-order categories. A category may be moved by dragging and dropping its associated folder icon.




Each category may also include a status tag


320


, which indicates the current status of the associated category. For example, status tag


320


may have the form “P,” which indicates that the associated category is “pending.” A pending category is a category for which all judgements are not yet reviewed or approved.




Each taxonomy


308


may include two (2) principal nodes, which may be called the “special_root” node and the “master_directory” node. The special_root node is a root node for several special categories. The special categories serve as temporary storage locations for electronic documents that have been removed from a substantive category of the directory for various reasons. For example, the special categories may comprise a “spam” category that stores identifiers of electronic documents that have been determined to be “spam,” that is, material created for advertising purposes to be classified into as many categories as possible without regard to whether the documents are appropriate to the categories; a “broken_link” category that stores identifiers of electronic documents that have been renamed by the user; identifiers of electronic documents that are invalid or contain erroneous hyperlinks; and a “server_down” category that stores identifiers of electronic documents that cannot be loaded because the associated origin server


120


is unavailable.




The master_directory node is the root node of the substantive directory. Each child node of master_directory is a category of the taxonomy represented in the directory.




The user may select any category that is displayed in the list by choosing it with a pointing device such as a mouse.




Window


300


further includes a Review Selected Category button


310


, a Pick A Category For Me button


312


, and Exit button


314


. A user may jump to the Review Category tab


304


and Review Category function


214


by selecting a category in taxonomy


308


and selecting the Review Selected Category button


310


. When the Pick A Category For Me button


312


is selected, directory application


124


may automatically, randomly select a pending category and transfer control to the Review Category function


214


. Alternatively, directory application


124


automatically selects the next pending category and transfers control to the Review Category function


214


.




A user may discontinue working in the Review Judgements function


210


and close window


300


by selecting the Exit button


314


.




REVIEW CATEGORY SUB-FUNCTION




The Review Category sub-function


214


enables a user to display, re-order, and modify attributes of electronic documents that are classified in a particular category.





FIG. 3B

is a diagram of a screen display


330


that is displayed by directory application


124


in response to selection of the Review Category sub-function


214


. Generally, screen display


330


includes a category name field


332


, document list


334


, and new document pane


336


.




The category name field


332


displays the name of the current category. The name of the current category corresponds to the category that was selected by the user using the Browse Categories sub-function


212


. Document list


334


comprises information about zero or more electronic documents that are classified in the current category.




For each electronic document, list


334


includes status information, as indicated by status column


306


. The status information comprises a graphical indication of the current status of the corresponding electronic document. For example, the status information may be “P” which indicates that judgements about a particular electronic document are pending.




List


334


also includes a link


322


and an identifier


340




a


,


340




b


. Each link


322


is a link to the associated electronic document identified by identifier


340




a


,


340




b


. Thus, a user may load and display any electronic document by selecting its link


322


. In response, directory application


124


loads the associated electronic document from cache


110


or origin server


120


and redirects browser


102


to the document.




Each identifier


340




a


,


340




b


may be a URL. Each electronic document in list


334


may be selected for further operations by pointing to it using a pointing device, such as a mouse.




Screen display


300


also includes an Accept button


310


and a Reject button


312


. The Accept button


310


is used to accept the information that is displayed for the currently selected electronic document. Conceptually, selecting the Accept button


310


means, for a particular electronic document, “this document belongs in this category and its judgement information is correct.” The Reject button


312


is used to reject the information that is displayed for the currently selected electronic document and to enter modified information pertaining to that document. This process is described further below in the section entitled “Review URL Sub-Function.”




The New URL pane


314


comprises an identifier field


342


, a judgement type field


344


, a category field


346


, a judgement quality field


348


, and an Add button


350


. The New URL pane is used to add a new electronic document and associated judgement information to the list


334


. In the preferred embodiment, the user selects the identifier field


342


, for example, by clicking in the field with a mouse. The user types an identifier of the electronic document, such as a URL. The current category name from category name field


322


is automatically displayed in category field


346


and stored in association with the new identifier.




The user may then select a judgement type for judgement type field


344


. The default judgement type is IN, which indicates that the new electronic document is “in” the current category. The user may change the judgement type to another valid judgement type (NOT_IN, LOCK_OUT, NEGATE_LOCK_OUT) by selecting judgement type field


344


.




A default quality value of “3” or “Good” is automatically displayed in quality field


348


and stored in association with the new electronic document identifier. The user may change the quality value by selecting a different valid quality value by pulling down a menu in quality field


348


and selecting the value.




When the foregoing information is entered for a new electronic document, the user may store the information by selecting Add button


350


.




Window


330


further includes a Review URL button


352


and Exit Category button


354


. The Review URL button


352


provides a fast way for the user to jump to the Review URL sub-function


216


for a document that was newly entered in pane


336


, or any selected document in list


334


, without having to select the Review URL tab


306


. When the Review URL button


352


is selected, directory application


124


transfers control to the Review URL sub-function


216


, which is described below. The user may discontinue processing documents in the current category, and return to Browse Categories function


312


, by selecting the Exit Category button


354


.




Documents may be re-ordered, as described further below.




REVIEW URL SUB-FUNCTION





FIG. 3C

is a diagram of a display window


360


that may be displayed by directory application


124


in connection with Review URL function


216


. Generally, window


360


comprises a document name field


362


, Priority Judgements pane


364


, Pending Judgements pane


366


, Finished Judgements pane


368


, New Judgements pane


370


, Special Categories pane


372


, and Rename URL pane


374


.




Document name field


362


displays the name or identifier of one electronic document for which judgements are to be reviewed, modified, or created (the “current document”).




If there are judgements stored in the master directory


122


for the current document, information describing such judgements is displayed in the Priority Judgements pane


364


. For each judgement, the information includes: type (IN, NOT_IN, LOCK_OUT, NEGATE_LOCK_OUT); category that the current document is in, not in, or locked out of; quality of the judgement (e.g., Perfect, Excellent, Good, Fair, Poor); username of the user who entered the judgement; date and time at which the judgement was entered; one or more tag values; and priority level. The tag values may be used to store information about the origin of a judgement, or identify a judgement as belonging to a particular sub-type. For example, tag values may include “P” (indicating that the judgement is not yet reviewed or “pending”), or “S” (indicating that the judgement originated through a split mapping). Since the Priority Judgement information is obtained from the master directory, the user is permitted to review it but there are no modification functions provided.




The Pending Judgements pane


366


displays information about zero or more unapproved judgements that relate to the current document. Preferably, the information includes: type (IN, NOT_IN, LOCK_OUT, NEGATE_LOCK_OUT); category that the current document is in, not in, or locked out of; quality of the judgement (e.g., Perfect, Excellent, Good, Fair, Poor); username of the user who entered the judgement; date and time at which the judgement was entered; and one or more tag values. The user may modify information for a pending judgement at any time.




An Accept button


376


and a Reject button


378


are also displayed in association with each line of pending judgement information. The user may approve and accept the associated judgement information by selecting the Accept button


376


. In response, directory application


124


marks the judgement information as accepted or finished, and re-displays the judgement information in the Finished Judgements pane


368


.




The judgement information is stored in memory of administrative client


116


. To persistently store the judgement information, the Submit URL button


399


of

FIG. 3D

is activated. In response, directory application


124


transfers the judgement information to directory server


120


and stores the judgement information in custom directory


126


. Details of an embodiment of a specific data representation are described below.




The user may also reject the judgement information by selecting the Reject button


378


. In response, directory application


124


changes the current judgement type value to NOT_IN, and temporarily stores the modified judgement in memory. If the user subsequently activates the Submit URL button


399


, then at directory server


120


, directory application


124


removes, from custom directory


126


, any previous IN judgement for the current document and the current category and having a priority value that is equal to or lower than the priority value of the NOT_IN judgement. At directory server


120


, directory application


124


broadcasts the change to all clients that are working on the current taxonomy. Thus, a REJECT operation will override any lower priority mapping that indicates that the current URL is IN the current category.




A document may be moved to one of the special categories (renamed_urls, spam, broken_link, server_down) using tools provided in the Special Categories pane


372


. The user selects one of the special categories by selecting the Select Special Category title bar


380


and choosing one of the categories from an associated pull-down menu


382


. After selecting the special category, the user selects the Move To Special & Submit button


384


. In response, directory application


124


stores information about the current document, including any judgement information, in the special category and removes the same information from any regular categories the document was in.




The New Judgements pane


370


may be used to enter a new judgement in the custom directory


126


for the current document. The user selects a judgement type from pull-down menu


384


. The user indicates which category the current document is IN by selecting a category button


386


. In response, directory application


124


provides a display of categories in the current custom directory.





FIG. 3D

is a diagram of window


360


showing an example of a category window


392


that may be generated by directory application


124


in response to selection of the category button


386


. Category window


392


displays the current taxonomy


308


in the same general form as shown in

FIG. 3A. A

user may select a category for the new judgement that is being defined by selecting the name of the category in window


392


. In one embodiment, placing a mouse cursor on a category in window


392


and double-clicking a mouse button causes the selected category to appear in the New Judgements pane


370


, and closes window


392


. Alternatively, window


392


may be closed manually by selecting Close button


394


.




Referring again to

FIG. 3D

, Rename URL pane


374


includes a URL name field


396


and a Rename URL button


398


. To rename the current electronic document, the user enters the new name in the URL name field


396


, and selects the Rename URL button


398


. In response, directory application


124


stores a copy of the current judgement information, and information about the associated electronic document, in the renamed_urls category of the special_root node of the custom directory


126


.




In the preferred embodiment, the foregoing functions cause judgement information to be stored temporarily in the custom directory


126


or in other temporary storage areas in memory or in non-volatile storage. To store the information persistently, the Submit URL button


399


is selected. In response, directory application


124


stores the updated judgement information shown in window


360


in the custom directory


126


.




PROCESSING MAPPINGS




A mapping of the taxonomy of the master directory


122


to the taxonomy of the custom directory


126


is stored in the form of a file containing one or more sequential records. Each record stores: information identifying who created the record; information identifying when the record was made; an identifier of the source node; and an identifier of the destination node. The information identifying who created the record may comprise a user name. Other identifying information, such as an Internet Protocol (IP) address or account information associated with the server that hosts the customized directory, or the equivalent, could be used. The information identifying when the record was made may comprise a time stamp or the equivalent. The source node identifier indicates one of the nodes of the master directory. The destination node identifier indicates one of the nodes of the customized directory. Further information on data representation of mappings is given below in the section entitled “Data Representation.”




A mapping of the master directory to the customized directory may reflect any change with respect to the master directory that is useful or desirable to the owner or operator of the customized directory. For example, the owner or operator of the customized directory can change the taxonomy of the master directory by renaming a node, moving a node to a different hierarchical location, adding one or more new nodes, or deleting one or more nodes. A mapping may reference any node of the master directory and any node in the customized directory or taxonomy.




A mapping may comprise a split, a one-to-one mapping, or a merge. A split occurs when one source category is mapped to multiple destination categories. A one-to-one mapping occurs when one source category has exactly one destination category, and the converse is also true. A merge occurs when multiple source categories are mapped to a single destination category. Combinations of these mappings may occur.





FIG. 2C

is an example of a combination of mappings involving source taxonomy categories A, B, and C and destination taxonomy categories


1


,


2


, and


3


. Category A is involved in a split between destination category


1


and destination category


2


. Category A is also involved in a merge between categories A, B and C directed to destination category


2


. Category B is involved in the merge between categories A, B and C directed to destination category


2


. Category C is also involved in the merge between categories A, B and C directed to destination category


2


. Destination category


3


has no corresponding source category. Therefore: category


1


will contain the electronic documents that are found in master directory category A; category


2


will contain all electronic documents that are found in master directory categories A, B, and C; category


3


will contain the same population of electronic documents as the master directory.




Directory mapping enables a user to customize the master directory by adding nodes, deleting nodes, renaming nodes, and moving nodes around. These operations may enable the user to improve the quality of the master directory.





FIG. 2B

is a block diagram of functions available when the Re-Map Taxonomies function


206


is selected. Generally, there may be two sub-functions. An Administration of Taxonomies sub-function


220


enables the user to carry out administrative functions relating to directory application


124


, such as setting permissions relating to creation and modification of taxonomy mappings. In one embodiment, a Re-Map Taxonomies sub-function


218


provides a way for a user to select one of several custom directories or taxonomies and then carry out work on the selected directory or taxonomy. When the Re-Map Taxonomies function is selected, in response, directory application


124


displays a pull-down menu that lists one or more mappings that have been previously created. The user selects one of the custom mappings. In response, directory application


124


displays a window containing tools for working with that mapping.




Names of the mappings that are displayed in the pull-down menu are obtained from a file stored at directory server


120


. Each mapping has a unique identifier. In one embodiment, directory application


124


at administrative client


116


asks directory server


120


what to put in the pull-down menu. Directory server


120


reads a file that contains a list of valid mappings. One or more permission values are stored in the list in association with the names of mappings. Directory application


124


displays only those mappings that the current user has permission to read, read/write, or administer.




To create a new mapping, an administrative user may create a new, empty mapping log file; create or obtain a source taxonomy; add the name of the source taxonomy to a taxonomy info file; and add the name of the new mapping to a mapping info file. Details of the formats of these and other files are described further below.





FIG. 4A

is a diagram of a display window


420


that may be generated by directory application


124


in response to selection of a custom taxonomy. Window


420


includes tools, buttons, and functions that implement further sub-functions that may include Re-Map sub-function


222


, Undo sub-function


224


, Re-Do sub-function


226


, Submit Edits sub-function


228


, and Show Unmapped sub-function


230


.




Re-Map sub-function


222


is carried out by graphically creating mappings using window


420


. Master taxonomy pane


422


of window


420


displays the taxonomy of master directory


122


. Custom taxonomy pane


424


displays the taxonomy of custom directory


126


. Mappings are graphically created and indicated in mapping area


426


. Each mapping is graphically represented by a line extending from a terminal icon associated with a category of the master directory to a terminal icon associated with a category of the custom directory. For example,

FIG. 4A

shows a first mapping


428


that expresses a one-to-one mapping of the “education” category of the master directory to the “education” category of the custom directory.




When the source category or the destination category of a mapping is displayed in collapsed form within one of the taxonomy panes


422


,


424


, a hidden mapping icon indicates that a portion of the mapping is hidden in the current display. For example, in

FIG. 4A

, a second mapping


430


expresses either a one-to-one mapping or a split mapping of the category “government and politics” of the master directory to one or more child nodes or sub-categories of the “government and politics” category of the custom directory. The exact mapping cannot be determined visually from the display of

FIG. 4A

because the “government and politics” category of the custom directory is collapsed.




A mapping may express a merge or a split. For example, a third mapping


432


expresses a merge of a plurality of categories


434


of the master directory to the “home_family_and_lifestyles” category of the custom directory. A plurality of source terminal nodes


438


and associated lines are directed from the master taxonomy and converge at a single destination terminal node


440


of the custom taxonomy.




When a taxonomy becomes large, it may be difficult for a user to locate a particular source category in the master directory to set up a new mapping. In addition, in one embodiment, directory application


124


may be configured to support multiple simultaneous users or administrative clients


116


. Accordingly, category searching and locking functions may be provided. In the preferred embodiment, a user may access the category searching and locking functions by selecting a category in the custom taxonomy and pressing a mouse button. In response, directory application


124


displays a special function menu


480


over window


420


.




Menu


480


includes a Search Source option


482


, Lock Category option


484


, and Lock Subtree option


486


. Selecting Search Source option


482


causes directory application


124


to search the taxonomy of the master directory to identify a category that matches the current category of the custom directory. If a matching category is found, that category and surrounding categories are displayed in pane


422


. The user may then create a mapping by dragging a link from the source terminal icon associated with the matching category to a desired destination terminal node of a category in the custom taxonomy.




The Lock Category option


484


sets a lock on the current selected category so that no other user can modify its mappings. The Lock Subtree option


486


sets a lock on the current selected category, and all its child categories.




In an alternate embodiment, menu


480


also includes a New Peer option and a New Child option. When the New Peer option is selected, directory application


124


inserts a new category at the same level of the taxonomy as the current category, and prompts the user to enter a name for the new peer category. When the New Child option is selected, directory application


124


inserts a new category one level below the current category, and prompts the user to enter its name.




When a new mapping is created, directory application


124


requires the user to lock the destination category in the custom taxonomy. If a mapping is attempted without initially setting a lock, directory application


124


displays a lock warning dialog box


470


over window


420


. In the example of

FIG. 4A

, the user is creating the second mapping


430


, which terminates at the category “government_and_politics/civic_participation”; however, that category is not locked. Accordingly, dialog box


470


prompts the user to set a lock. If no lock is set, the user cannot create a new mapping.




Color may be used to assist the user in creating valid mappings. In the preferred embodiment, each terminal icon may have no color or may be colored yellow, green, red, or blue. A terminal icon with no color has no mapping associated with it. When a new mapping is created, a destination terminal icon changes to red while the user is hovering the mouse cursor over that icon, if the user is not permitted to make a mapping terminating at that icon. For example, attempting to create a mapping from one category of a directory to another category of the same directory causes the second terminal icon to change to red, and a mapping cannot be created. If the user is permitted to make a mapping terminating at a particular icon, then that icon turns yellow when the mouse cursor hovers over it. A green terminal icon indicates that a valid one-to-one mapping terminates at that icon. A blue terminal icon indicates that a valid mapping terminates at that icon and that the icon is part of a multiple mapping such as a split or merge.




Automatic merge mappings may be created. In an embodiment, an automatic merge mapping may be created by selecting a category of the master directory that has child categories, pressing a control key of the keyboard, or the equivalent, and moving the mouse cursor to a category of the custom directory. When the mouse is released, in response, directory application


124


maps all the child categories of the master directory category to the selected category of the custom directory, creates and stores associated mapping information, and displays graphical lines that indicate the multiple mapping.




Window


420


also includes a Start button


452


, Forward button


454


, and Reverse button


456


associated with each pane


422


,


424


. A user may select the first category of a taxonomy by pressing the Start button


452


associated with the pane


422


,


424


in which the taxonomy is displayed. The user may advance to the next category by selecting the Forward button


454


and may move to the preceding category using the Reverse button


456


. Thus, using these buttons, a user may select a first category and then step through each successive category in a rapid, orderly manner. This facilitates creating or reviewing a mapping of a complete taxonomy and ensures that no child category is overlooked in the process.




Window


420


further includes an Exit button


458


, Undo button


460


, and Redo button


462


. A user may discontinue working with a mapping by selecting the Exit button


458


. In response, directory application


124


returns control to Re-Map Taxonomies function


206


. A user may remove the most recently created mapping by selecting the Undo button


460


. In response, directory application


124


deletes the most recently stored mapping record from the mapping log file. The user may restore the most recently deleted mapping


462


by selecting the Redo button


462


.




The Undo and Redo operations are supported by information and structures in memory at the administrative client


116


that comprise a log of operations carried out by the user. When information is submitted to directory server


120


using the Submit URL button


399


, the client cannot Undo or Redo the changes that are submitted.




MODIFYING THE MASTER DIRECTORY




In one embodiment, the owner or operator of the master directory may also modify the master directory to create a new master directory, and create a mapping between the old master directory and the new master directory that reflects the modifications. The customized directory, which is based on a mapping to the old master directory, still can be updated. Thus, subsequent modifications or updates to the master directory may be automatically integrated into the custom directory.




When the master directory is modified, the owner or operator of the master directory carries out the modification by creating one or more mappings of a first version of the master directory to a second version of the master directory. The second version is the modified master directory. To propagate such modifications to the custom directory, the mapping of the first version of the master directory to the custom directory is modified to express it in terms of the second version of the master directory.




DATA REPRESENTATION





FIG. 4B

is a block diagram of data representation elements that may be used in an embodiment. Generally, directory application


124


may interact with user data


402


, group data


404


, judgement list information


406


, taxonomy information


408


, mapping information


410


, taxonomy log


412


, judgement block file


414


, judgement log


416


, and mapping log


418


.




For convenience, the terms “log,” “file,” and similar terms may be used to identify the foregoing elements. However, any form of data representation may be used to store the information that is described in connection with these elements. Use of files is not required. Linked lists, stacks, database tables, and other forms of data storage may be used.




User data


402


stores and specifies information about usernames that directory application


124


will recognize as valid during login function


202


. The information in User data


402


is reread every time a new user authentication is attempted. Each record in user data


402


comprises a username, password, and priority value. Preferably, usernames and passwords are case-sensitive. The priority value, which may be an integer value, is used in the Review URL sub-function. The category number value is ignored for LOCK_OUT and NEGATE_LOCK_OUT entries. The following rules are observed with respect to priority of judgements:




1. Judgements of lower priority cannot affect earlier judgements of higher priority.




2. IN judgements override previous IN and NOT_IN judgements.




3. NOT_IN judgements override previous IN and NOT_IN judgements.




4. LOCK_OUT judgements override previous IN judgements.




5. NEGATE_LOCK OUT judgements override previous LOCK_OUT judgements. However, the IN judgements that the previous LOCK_OUT judgement overrode are still overridden.




Group data


404


stores and specifies information about groups for the system. Group names are case-sensitive, and may comprise alphanumeric characters. Group data


404


is reread every time a new user authentication is attempted.




Preferably, group data


404


stores information in the following format: <groupname> <# admin groups><admin groupname> . . . <# admin users><admin username> . . . <# member groups><member groupname> . . . <# member users><member username> . . .




Judgement list info


406


specifies what judgement lists are available. Every judgement list is specified by a block file, which has only IN judgements in a more compact format, and a judgement list. Every judgement list has an associated taxonomy and a description string. The judgement list must have a unique integer tag.




Preferably, judgement list info


406


stores information in the following format: <j


1


num><assoc tax num><block filename><judgement log filename><text description><# admin groups><groupname> . . . <# admin users><username> . . . <#read-write groups><groupname> . . . <# read-write users><username> . . . <#read-only groups><groupname> . . . <# read-only users><username> . . .




Every judgement list number must be unique. The block files are opened in read only mode, but the judgement logs are read and then appended to. Two judgement lists could have the same block file. Two judgement lists may not have the same judgement log files, or they will both be appended to simultaneously, which is undesirable.




Taxonomy info


408


specifies what taxonomies are available. Every taxonomy is specified by a taxonomy log


412


, and has a unique integer number. A Based On value identifies the taxonomy number of another taxonomy from which the current taxonomy was originally copied. The Based On value may be used when small modifications are made to pre-existing taxonomies, and it is desired to save a trail back to the original taxonomies. A flag value such as “−1” may indicate that a taxonomy is not based on another one.




Preferably, taxonomy info


408


is stored in the following format: <taxonomy number><taxonomy log filename><based on number><writable flag><string description><# admin groups><groupname> . . . <# admin users><username> . . . <#read-write groups><groupname> . . . <# read-write users><username> . . . <#read-only groups><groupname> . . . <# read-only users><username> . . .




Every taxonomy number must be unique. Multiple taxonomies can be based on the same taxonomy. Taxonomies can be opened in both read-only mode and read-write mode. More than one taxonomy may not use the same taxonomy log. The taxonomy log will never be opened for writing if the writable flag is set.




Mapping info


410


stores information identifying existing mappings. A mapping is made between two taxonomies, both of which must be identified in the taxonomy info


408


. Preferably, mapping info


410


stores information in the following format:




<source taxonomy number><destination taxonomy number><mapping log file><string description><Boolean lock sources><# admin groups><groupname> . . . <# admin users><username> . . . <#read-write groups><groupname> . . . <# read-write users><username> . . . <#read-only groups><groupname> . . . <# read-only users><username> . . .




The source taxonomy log is opened in read-only mode, and the destination taxonomy log is opened in read-write mode. The mapping log is opened in read-write mode. The Boolean value identifies whether source or destination categories need to be locked to submit new mappings.




A taxonomy log


412


stores information that defines and specifies a taxonomy. Preferably, taxonomy log


412


comprises a plurality of taxonomy log records or lines, each having the format: <identifier number><category number><parent number><category name><type><user><date><index><number of tags><tag> . . .




Each entry in the taxonomy log specifies an action to the taxonomy. The valid values for the <type>field are “0”, “1”, and “2”, which respectively identify CREATE, REMOVE, and MODIFY actions.




Each identifier number is unique; every line in a taxonomy log has a different identifier number. Each category number is unique and not reused; preferably, category numbers are positive integers. For every category number, there must either be no lines in a taxonomy log, or first a CREATE record, then zero or more MODIFY records, then one or zero REMOVE records. It is an error to CREATE the same category number twice, or to MODIFY or REMOVE it before it is CREATEd, or to MODIFY a category number before it is CREATEd or after it is REMOVEd.




For REMOVE records, only the category number is used to identify the category to be removed. The name or index need not match the previous item(s).




For any record, the parent number must be a valid category number, that is, a number of a category that has been CREATE'd and not REMOVE'd. Root level categories use a category number of −1. The username need not be a valid username according to the user data file. The date is stored in the format YYYYMMDDhhmm where YYYY is a year value, MM is a month value, DD is a day value, hh is an hour value, and mm is a minute value.




The index field specifies into which child of a parent a category should be inserted. For example, in the line:




9 40 28 “new child” 0 ssuchter 199903261358 2 2 “hello world” xyz The new category number is “40,” the parent number is “28.” Category number “28” must already exist. The new category “40” will have a name of “new child” (without the quotes) and two string tags of “hello world” and xyz. The index field is set to “2.” Category number “28” must have at least two children already. If category number “28” has exactly two children, category number “40” will be the third child of category number “28.” If category number “28” has more than two children, category number “40” will be inserted into the child list of category number “28” as the third child.




For MODIFY records, the index specifies the new position of the MODIFIED category after it has been removed from the old parent category.




Judgement block file


414


provides a compact way to store and specify many IN judgements. An IN judgement is a judgement that specifies that a URL is within or “in” a specific category. A block file stores one or more chunks of IN judgements that have like attributes. Each chunk is stored in the format:




<number of urls><quality value><top 10 number value><confidence value><weight value>




<priority value><username><date><pending flag><number of tags value><tag> . . .




<url><cat num> . . .




<url><cat num> . . .




. . .




Any number of such chunks can be stored in the judgement block file


414


. If a particular mapping of a URL to a category number exists twice, then the later attributes are used.




The weight and confidence values provide feedback for use in training, or may serve as inputs to an automatic document classifier. The confidence value defines how sure a user is that a judgement quality value is correct. Typically, a confidence value would be entered by a manager of the user who created the associated quality value. For example, if a user enters a series of judgements with quality values, and a manager later determines that the user is incompetent, the manager may assign a low confidence value to the judgements. When the information is read later by an automatic document classifier and used to carry out automatic classification of electronic documents, the classifier will rely less on judgements with low confidence values. The weight value how important the current document is to the training process. For example, a document may be highly relevant to a particular category, but may have little use in training due to unusual internal links or other factors. The weight value for such a document would be low.




The weight value and the confidence value may be stored in the form of floating point numbers. In an alternate embodiment, the weight value and the confidence value could be generated automatically by the classifier.




If a category number is invalid, then a judgement is not made. A category number is invalid if it is not a valid category number for the taxonomy with which the current judgement list is associated.




Judgement log file


416


stores judgement information. In the preferred embodiment, as each judgement is created, a new judgement entry is appended to the judgement log file


416


. The valid types of judgements are IN, NOT_IN, LOCK_OUT, and NEGATE_LOCK_OUT, which may be represented, respectively, by different integer values.




Preferably, judgement log file stores one or more lines in the following format:




<identifier number><category number><URL><quality><top 10 number><confidence><weight><priority>




<type><username><date><pending><number of tags><tag> . . .




. . .




Each identifier number is a unique, positive value.




Mapping log file


418


specifies mappings and consists of lines of the form:




<id><source cnum><dest cnum><type><username><date><# tags><tag> . . .




The id field is a unique non-negative integer that uniquely identifies each line. The source cnum value is a category number in the source taxonomy. Lines that contain invalid source cnum values are ignored. The dest cnum value is a category number in the destination taxonomy. Lines that contain invalid dest cnum values are ignored. The destination taxonomy and the source taxonomy must be two separate taxonomies, although they can have the same data. While in the mapping mode, the destination taxonomy can be editable. (But the changes are saved in the taxonomy log, not the mapping log).




The type value is either “0”, “1”, or “2” . A value of “0” means to create a mapping between the specified categories. A value of “1” means to remove an existing mapping, and “2” means to modify an existing mapping by changing the username, date, or tags. For every pair of category number values, it is an error to have anything but a type


0


record first. If another type


0


record occurs before a type


1


record, for those categories, that is also an error. After a type


1


record occurs for a particular pair, a type


0


record can occur again, re-creating the mapping. Type


2


records can only appear after type


0


records, but before type


2


records.




The username field is the name of the user that created, modified, or removed the mapping. One user can create a mapping and another user can remove it. The username field is a string that generally is a valid username.




The date field is of the form YYYYMMDDhhmm. The date field is used to enable a user to track how or when mappings are created. The tag values are string values that may store any useful information. Any number of tag values may be used.




ORDERING DOCUMENTS AND INTEGRATING ORDER MODIFICATIONS




Referring again to

FIG. 3B

, an order value is stored in association with the information that identifies a document. Documents are displayed in list


334


according to the order values in ascending order. Documents in list


334


may be re-ordered by selecting an identifier of a document, such as its URL, and dragging it into a new location in the list. In response, directory application


124


locks the current category and modifies the order value to reflect the new order.




The order value is associated exclusively with the custom directory. If the master directory is modified such that a particular document is moved to a new ordinal location in a corresponding category, the new order value of that document in the master directory is not transferred to the document in the custom directory. Generally, the order value of the document in the custom directory always takes precedence. Documents that do not have an order value specified in the custom directory, but do have an order value specified in the master directory, are processed specially. Such documents are placed, in the custom directory, lower in order than documents in the custom directory that have an order value, but higher in order than un-ordered documents of the custom directory.




In an embodiment, re-ordering may be carried out as in several different cases.




To calculate the order of judgements within a category, the directory application


124


may sort the IN judgements for a particular category first according to their order number, with higher orders first, then by their quality, with higher quality first, and then by their document identifier or URL, in alphabetic order with earlier URLs first.




When a user is re-ordering documents using directory application


124


at one of the clients, which may be done using the Review Category sub-function


214


, the following process is carried out to integrate the re-ordered documents.




1. The user reorders some documents in a category and clicks on a “Submit Reorder” button.




2. Directory application


124


calculates N, where N is the number of documents starting at the top of the category which are out of order by their quality or document identifier value. The order number value is not considered for this step.




3. Directory application


124


assigns the value “0” to the order fields of all documents after point N.




4. Directory application


124


starts at the Nth document and assigns it an order number of “1”. The value “1” is also assigned to a Current Order value. The directory application


124


works upwards through the list, assigning the Current Order value to every document, and incrementing the Current Order value every time a document and the document preceding it are out of order according to their quality or document identifier value. In the worst case, the Current Order value is incremented once for every document and the top document is assigned an order value of N.




When directory application


124


is mapping judgements from a master directory to a custom directory, the following process is used.




1. For every custom directory category, calculate the list of all of the judgements which are placed in that directory category.




2. Calculate the maximum value of the order field for all those judgements. Subtract the maximum value +1 from every order field, so that the highest order number from a mapped judgement is “−1”.




3. Accordingly, when these judgements are considered in conjunction with the custom judgements, all of the custom judgements' order numbers will be higher than the mapped judgements, so they will be placed on top.




AUTOMATICALLY POPULATING A CUSTOM DIRECTORY




After the mappings are created and stored, the master directory may use the mappings to automatically add electronic documents (“populate”) to categories of the customized directory. Generally, a process of automatically populating a custom directory is carried out based on the mappings of the master directory to the custom directory. The mappings may be used to transfer identifiers of electronic documents from nodes of the master directory to nodes in the custom directory. In this manner, a custom directory is created that has a different look and feel than the master directory.




In one embodiment, a populating mechanism periodically reads the stored mapping information and judgement information, and creates and stores the custom directory based on it. Thus, populating the custom directory is carried out in an offline or batch mode. Alternatively, the populating mechanism may be integrated into directory application


124


, and the populating operation may be carried out in real time as a user creates or modifies mappings.





FIG. 5

is a flow diagram of an embodiment of a process of populating a custom directory. A populating mechanism may populate a custom directory by carrying out the steps of FIG.


5


.




In block


502


, the process reads taxonomy information. In one embodiment, the populating mechanism sequentially reads each taxonomy record from the taxonomy file into memory. The populating mechanism builds a list of valid category numbers based on the taxonomy file records. This enables the mechanism to determine what category numbers are valid.




In block


504


, the process reads the mapping of a source directory or taxonomy to a destination directory or taxonomy, and builds an image of the mapping. For example, the mapping log file is read and one or more objects or other data structures are created and stored in memory, thereby building a memory image of the mapping between the taxonomies. This may involve identifying the source node in the current mapping record, locating the corresponding node in the source directory, and locating its list of subordinate categories and its list of electronic documents (one or both of which may have a null value).




In block


506


, all the judgements of the source taxonomy are read. In one embodiment, the populating mechanism reads all the judgements for the source taxonomy into memory from the judgement block file associated with the source directory, which is normally the master directory. If this information exceeds available memory, known memory management techniques may be used to keep needed information available in memory.




A mapping of a source category to a destination category is identified, as shown in block


508


. For example, for each category of the source taxonomy, the populating mechanism determines the destination category to which the source category is mapped. A mapping involving a category having one or more child categories is not automatically propagated to the child categories.




In block


510


, electronic documents that are in the current source category are copied to the destination category of the custom taxonomy. In one embodiment, the populating mechanism then copies each IN judgement for the source category into the destination category of the custom directory, in memory. Generally, all values of a source judgement are carried over into the custom directory, including priority values, etc.




Merge mappings are processed. Preferably, a Merge mapping is handled like a plurality of one-to-one mappings.




Split mappings are also processed, as shown by block


512


. For example, if a Split mapping is encountered, the populating mechanism marks each destination judgement with an “S” tag by storing the value “S” in one of the tag fields. This informs the user that the judgement in the custom directory resulted from a split, to enable the user to review the appropriateness of that judgement.




In block


514


, un-reviewed judgements are processed. In one embodiment, if a judgement in a source category is marked “Pending,” for example, using a “P” tag value, several different operations can be carried out. In one embodiment, each such judgement is not marked pending in the destination category. Alternatively, the tag value is left unchanged, so that all Pending tags pass through to the destination category.




In another alternative, when a source category is not marked “Pending,” and is involved in a Split mapping, the judgement is always marked “Pending” in the destination categories. This indicates to the user that the judgement should be reviewed to ensure the split is appropriate.




When a judgement type value of LOCK_OUT is encountered, in response, the populating mechanism removes the document associated with that judgement from any category that the document is in, except for any such category that contains an IN judgement for the same document having a higher priority value than the priority value of the LOCK_OUT judgement. In client, a complementary IN judgement is concurrently submitted for one of the special categories so that a user can see a trace of what happened in processing the LOCK_OUT judgement.




The judgements that have been added to the destination taxonomy are stored, as shown in block


516


. For example, the populating mechanism stores a copy of all the judgements of the destination categories in a judgement block file that is associated with the custom directory. As described above, the judgement block file stores only IN judgements and thus has a more compact format.




In block


518


, custom judgements associated with the destination taxonomy are read and integrated with the destination taxonomy. As an example, the populating mechanism reads the judgement log file associated with the custom directory. As described above, the judgement log file stores judgements that have been entered by a user of the custom directory and that represent modifications to the master directory. Each judgement in the custom judgement log file is read and applied to the judgements that are currently stored in memory. This step enables the populating mechanism to override judgements of the master directory with conflicting judgements of the custom directory.




This step may involve testing the priority value associated with each judgement, determining whether it is greater than the priority value of any conflicting judgement from the master directory, and overriding the master directory judgement only when the priority value is greater.




The judgement information may be stored, as shown by block


520


. For example, the populating mechanism creates a new judgement block file, stores all the current judgements associated with the custom directory in the new judgement block file, and deletes the old version of the custom directory judgement block file.




Accordingly, the owner or operator of a search engine can customize its directory and still receive and integrate updates from the master directory into the customized directory. The search engine operator can re-map categories of the master directory, and changes to the categories of the master directory are automatically propagated to the customized directory. The operator of the master directory can insert judgements about electronic documents that are indexed in the directory, and its judgements will be entered in the customized directory only when they have less precedence than judgements entered by the owner or operator of the customized directory.




When the custom directory is created, documents associated with each category of the master directory will propagate automatically into the customized directory. Accordingly, separate customized and master directories may be maintained and improved, and the improvements automatically propagate.




When a custom directory is created from each mapping and judgement, the mappings and judgements take precedence over any changes to the master directory.




Advantageously, this system keeps track of who made every mapping and judgement. Thus, the customized directory is dynamic, rather than static. In a static directory, the directory comprises identifiers of electronic documents organized in categories, but there is no stored information that indicates how an electronic document got placed in a category keeps track of how the directory was created, not just its current state.




HARDWARE OVERVIEW





FIG. 6

is a block diagram that illustrates a computer system


600


upon which an embodiment of the invention may be implemented.




Computer system


600


includes a bus


602


or other communication mechanism for communicating information, and a processor


604


coupled with bus


602


for processing information. Computer system


600


also includes a main memory


606


, such as a random access memory (RAM) or other dynamic storage device, coupled to bus


602


for storing information and instructions to be executed by processor


604


. Main memory


606


also may be used for storing temporary variables or other intermediate information during execution of instructions to be executed by processor


604


. Computer system


600


further includes a read only memory (ROM)


608


or other static storage device coupled to bus


602


for storing static information and instructions for processor


604


. A storage device


610


, such as a magnetic disk or optical disk, is provided and coupled to bus


602


for storing information and instructions.




Computer system


600


may be coupled via bus


602


to a display


612


, such as a cathode ray tube (CRT), for displaying information to a computer user. An input device


614


, including alphanumeric and other keys, is coupled to bus


602


for communicating information and command selections to processor


604


. Another type of user input device is cursor control


616


, such as a mouse, a trackball, or cursor direction keys for communicating direction information and command selections to processor


604


and for controlling cursor movement on display


612


. This input device typically has two degrees of freedom in two axes, a first axis (e.g., x) and a second axis (e.g., y), that allows the device to specify positions in a plane.




The invention is related to the use of computer system


600


for managing changes to a directory of electronic documents. According to one embodiment of the invention, managing changes to a directory of electronic documents is provided by computer system


600


in response to processor


604


executing one or more sequences of one or more instructions contained in main memory


606


. Such instructions may be read into main memory


606


from another computer-readable medium, such as storage device


610


. Execution of the sequences of instructions contained in main memory


606


causes processor


604


to perform the process steps described herein. In alternative embodiments, hard-wired circuitry may be used in place of or in combination with software instructions to implement the invention. Thus, embodiments of the invention are not limited to any specific combination of hardware circuitry and software.




The term “computer-readable medium” as used herein refers to any medium that participates in providing instructions to processor


604


for execution. Such a medium may take many forms, including but not limited to, non-volatile media, volatile media, and transmission media. Non-volatile media includes, for example, optical or magnetic disks, such as storage device


610


. Volatile media includes dynamic memory, such as main memory


606


. Transmission media includes coaxial cables, copper wire and fiber optics, including the wires that comprise bus


602


. Transmission media can also take the form of acoustic or light waves, such as those generated during radio-wave and infra-red data communications.




Common forms of computer-readable media include, for example, a floppy disk, a flexible disk, hard disk, magnetic tape, or any other magnetic medium, a CD-ROM, any other optical medium, punch cards, paper tape, any other physical medium with patterns of holes, a RAM, a PROM, and EPROM, a FLASH-EPROM, any other memory chip or cartridge, a carrier wave as described hereinafter, or any other medium from which a computer can read.




Various forms of computer readable media may be involved in carrying one or more sequences of one or more instructions to processor


604


for execution. For example, the instructions may initially be carried on a magnetic disk of a remote computer. The remote computer can load the instructions into its dynamic memory and send the instructions over a telephone line using a modem. A modem local to computer system


600


can receive the data on the telephone line and use an infra-red transmitter to convert the data to an infra-red signal. An infra-red detector can receive the data carried in the infra-red signal and appropriate circuitry can place the data on bus


602


. Bus


602


carries the data to main memory


606


, from which processor


604


retrieves and executes the instructions. The instructions received by main memory


606


may optionally be stored on storage device


610


either before or after execution by processor


604


.




Computer system


600


also includes a communication interface


618


coupled to bus


602


. Communication interface


618


provides a two-way data communication coupling to a network link


620


that is connected to a local network


622


. For example, communication interface


618


may be an integrated services digital network (ISDN) card or a modem to provide a data communication connection to a corresponding type of telephone line. As another example, communication interface


618


may be a local area network (LAN) card to provide a data communication connection to a compatible LAN. Wireless links may also be implemented. In any such implementation, communication interface


618


sends and receives electrical, electromagnetic or optical signals that carry digital data streams representing various types of information.




Network link


620


typically provides data communication through one or more networks to other data devices. For example, network link


620


may provide a connection through local network


622


to a host computer


624


or to data equipment operated by an Internet Service Provider (ISP)


626


. ISP


626


in turn provides data communication services through the world wide packet data communication network now commonly referred to as the “Internet”


628


. Local network


622


and Internet


628


both use electrical, electromagnetic or optical signals that carry digital data streams. The signals through the various networks and the signals on network link


620


and through communication interface


618


, which carry the digital data to and from computer system


600


, are exemplary forms of carrier waves transporting the information.




Computer system


600


can send messages and receive data, including program code, through the network(s), network link


620


and communication interface


618


. In the Internet example, a server


630


might transmit a requested code for an application program through Internet


628


, ISP


626


, local network


622


and communication interface


618


. In accordance with the invention, one such downloaded application provides for managing changes to a directory of electronic documents as described herein.




The received code may be executed by processor


604


as it is received, and/or stored in storage device


610


, or other non-volatile storage for later execution. In this manner, computer system


600


may obtain application code in the form of a carrier wave.




In the foregoing specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.



Claims
  • 1. A method of providing electronic documents, the method comprising the steps of:creating a second directory by mapping the second directory from at least a portion of a first directory of the electronic documents, wherein the first directory has a hierarchy of a first set of one or more categories into which one or more electronic documents are classified, and wherein the second directory has a hierarchy of a second set of one or more categories; associating, with the second directory, one or more customizations that represent differences between the hierarchy of the first directory and the hierarchy of the second directory; and associating, with the second directory, one or more judgements that indicate whether one or more of the electronic documents are properly classified in the second set of categories; in response to the first directory being modified by changes to one or more of the first set of categories, automatically modifying the second directory by using at least some of the changes to the one or more categories of the first set of categories, without modifying the customizations or the judgements.
  • 2. A method as recited in claim 1, wherein creating a second directory includes:identifying or more master judgements that indicate whether one or more of the electronic documents are properly classified in the first set of categories; in response to the first directory being modified by changes to one or more of the master judgements, automatically propagating the changes to the second directory, without modifying the customizations or the judgements, to create a modified second directory.
  • 3. A method as recited in claim 1, further comprising the steps of:displaying a taxonomy of the second set of categories of the second directory; receiving a selection of one of the second set of categories; displaying one or more judgements associated with one of the electronic documents in the selected category; and receiving and storing a quality value that indicates how closely the one of the electronic documents matches the selected category.
  • 4. A method as recited in claim 1, wherein the step of creating a second directory includes the step of creating the second directory based at least partially on one or more customizations that reflect a merge of a plurality of the categories of the first set of categories of the first directory to one of the second set of categories of the second directory.
  • 5. A method as recited in claim 1, wherein the step of creating a second directory includes the step of creating the second directory based at least partially on one or more customizations that reflect a split of one of the first set of categories of the first directory into a plurality of categories of the second set of categories of the second directory.
  • 6. A method as recited in claim 1, further comprising:creating a new judgement for the second directory, wherein the new judgement indicates that a particular electronic document is in one of the second set of categories of the second directory.
  • 7. A method as recited in claim 6, further comprising the steps of:marking the new judgement as un-reviewed; and receiving an acceptance signal indicating that the new judgement is accepted, and in response thereto, persistently storing the new judgement in the second directory.
  • 8. A method as recited in claim 6, further comprising the steps of:marking the new judgement as un-reviewed; and receiving a rejection signal indicating that the new judgement is rejected, and in response thereto, modifying the new judgement to indicate that the electronic document is not in the category.
  • 9. A method as recited in claim 1, further comprising:creating a new judgement for the second directory, wherein the new judgement indicates that a particular electronic document is not in one of the second set of categories of the second directory.
  • 10. A method as recited in claim 1, further comprising:creating a new judgement for the second directory, wherein the new judgement indicates that a particular electronic document is locked out of all categories of the second directory.
  • 11. A method as recited in claim 1, further comprising the step of integrating the customizations and judgements into the second directory by performing the steps of:identifying each mapping of a source category in the first set of categories of the first directory to a destination category in the second set of categories of the second directory; using the mapping to copy each judgement that is in the source category to the destination category; and marking as un-reviewed, each judgement that is copied to the destination category and that originates from a split mapping of the source category.
  • 12. A method as recited in claim 11, further comprising the step of:marking as un-reviewed, each judgement that is copied to the destination category and that originates from an un-reviewed judgement in the source category.
  • 13. A method as recited in claim 11, further comprising.creating one or more custom judgements that are associated with the second directory; and integrating each of the custom judgements into the second directory by overriding any conflicting judgement originating from the first directory.
  • 14. A method as recited in claim 11, further comprising the step of:creating one or more custom judgements that are associated with the second directory, wherein the custom judgements have a judgement type value selected from among “in category,” “not in category,” “exclude from all categories”, and “undo exclude from all categories”; and integrating each of the custom judgements into the second directory by overriding any conflicting judgement originating from the first directory.
  • 15. A method as recited in claim 11, further comprising the step of:creating one or more custom judgements that are associated with the second directory, wherein the custom judgements have a judgement type value selected from among “in category,” “not in category,” “exclude from all categories”, and “undo exclude from all categories”; and integrating each of the custom judgements into the second directory by overriding any conflicting judgement originating from the first directory, wherein the integrating is carried out such that: judgements of lower priority cannot affect earlier judgements of higher priority; “in” judgements override previous “in” and “not in” judgements; “not in” judgements override previous “in” and “not in” judgements; “exclude from all categories” judgements override previous “in” judgements; and “undo exclude from all categories” judgements override previous “exclude from all categories” judgements.
  • 16. A method of providing electronic documents, the method comprising:creating a customized directory by mapping at least a portion of a master directory of the electronic documents into at least a portion of the customized directory, wherein the master directory is defined by a hierarchical taxonomy of a first set of categories into which one or more of the electronic documents are classified, and wherein the customized directory has a second set of categories; associating, with the customized directory, one or more customizations that reflect differences between the master directory and the customized directory; associating, with the customized directory, one or more judgements that indicate whether one or more of the electronic documents are properly classified in the second set of categories; in response to the master directory being modified by changes to one or more of the categories, automatically propagating the changes in the master directory to the customized directory, without overriding the customizations or judgements of the customized directory.
  • 17. A method as recited in claim 16, further comprising the steps of:identifying one or more master judgements that represent whether one or more of the electronic documents are properly classified in the first set of categories; in response to the master directory being modified by changes to one or more of the master judgements, automatically propagating the changes to the customized directory, without modifying the customizations or the judgements, to create a modified customized directory.
  • 18. A method as recited in claim 16, further comprising the steps of creating and storing one or more judgements of the customized directory by the steps of:displaying a taxonomy of the second set of categories of the customized directory; receiving a selection of one of the second set of categories; displaying one or more judgements associated with one of the electronic documents in the selected category; and receiving and storing a quality value that indicates how closely the one of the electronic documents matches the selected category.
  • 19. A method as recited in claim 16, wherein the step of creating the customized directory includes the step of creating the customized directory based at least partially on one or more customizations that reflect a merge of a plurality of the first set of categories of the master directory to one of the second set of categories of the customized directory.
  • 20. A method as recited in claim 16, wherein the step of creating the customized directory includes the step of creating the customized directory based at least partially on one or more customizations that reflect a split of one of the first set of categories of the master directory into a plurality of categories in the second set of categories of the customized directory.
  • 21. A method as recited in claim 16, further comprisingcreating a new judgement for the customized directory, wherein the new judgement indicates that a particular electronic document is in one of the second set of categories of the customized directory.
  • 22. A method as recited in claim 16, further comprising:creating a new judgement for the customized directory, wherein the new judgement indicates that a particular electronic document is not in one of the second set of categories of the customized directory.
  • 23. A method as recited in claim 16, further comprising:creating a new judgement for the customized directory, wherein the new judgement indicates that a particular electronic document is locked out of all categories of the customized directory.
  • 24. A method as recited in claim 23, further comprising the steps of:marking the new judgement as un-reviewed; and receiving an acceptance signal indicating that the new judgement is accepted, and in response thereto, persistently storing the new judgement in the customized directory.
  • 25. A method as recited in claim 23, further comprising the steps of:marking the new judgement as un-reviewed; and receiving a rejection signal indicating that the new judgement is rejected, and in response thereto, modifying the new judgement to indicate that the electronic document is not in the category.
  • 26. A method as recited in claim 16, further comprising the step of integrating the customizations and judgements into the customized directory by performing the steps of:identifying each mapping of a source category in the first set of categories of the master directory to a destination category in the second set of categories of the customized directory; using the mapping to copy each judgement that is in the source category to the destination category; and marking as un-reviewed, each judgement that is copied to the destination category and that originates from a split mapping of the source category.
  • 27. A method as recited in claim 26, further comprising the step of:marking as un-reviewed, each judgement that is copied to the destination category and that originates from an un-reviewed judgement in the source category.
  • 28. A method as recited in claim 27, further comprising:creating one or more custom judgements that are associated with the customized directory; and integrating each of the custom judgements into the customized directory by overriding any conflicting judgement originating from the master directory.
  • 29. An apparatus for providing electronic documents, comprising:a second directory of the electronic documents that is based on a first directory of the electronic documents, wherein the first directory is at least partially defined by a hierarchy of a first set of one or more categories into which one or more of the electronic documents are classified, wherein the second directory has a hierarchy of a second set of one or more categories; wherein the second directory is associated with one or more customizations that indicate differences between the first directory and the second directory, and with one or more judgements that indicate whether one or more of the electronic documents are properly classified in the second set of categories; and a directory application software element that is capable of performing the steps of modifying the first directory by changes to one or more of the categories; and automatically propagating the changes to the second directory, without modifying the customizations or the judgements, to create and store a modified second directory.
  • 30. A computer-readable medium carrying one or more sequences of instructions for providing electronic documents, wherein execution of the one or more sequences of instructions by one or more processors causes the one or more processors to perform the steps of:creating a second directory by mapping at least a portion of a first directory of the electronic documents into at least a portion of the second directory, wherein the first directory has a hierarchy of a first set of categories into which one or more of the electronic documents are classified, and wherein the second directory has a hierarchy of a second set of categories; associating, with the second directory, one or more customizations that indicate differences between the first directory and the second directory; associating, with the second directory, one or more judgements that indicate whether one or more of the electronic documents are properly classified in the second set of categories; in response to the first directory being modified by changes to one or more of the first set of categories, automatically propagating the changes to the second directory, without modifying the customizations or the judgements, to create a modified second directory.
  • 31. A computer-implemented method for re-categorizing documents that have been categorized in a first directory based on a first hierarchy of categories, the method comprising the steps of:associating judgement data with sets of one or more of said documents; wherein said judgement data represents whether said sets of one or more of said documents are properly classified within a second hierarchy of categories; generating a second directory based on the first directory; wherein the second directory categorizes said documents based on the second hierarchy of categories; and wherein the step of generating said second directory based on said first directory is performed based on: a mapping between the documents and the categories of the second hierarchy of categories, and said judgement data.
  • 32. The method of claim 31, further comprising the step of, after generating the second directory, automatically propagating a change to one or more of the categories in the first hierarchy to the second hierarchy.
  • 33. The method of claim 32, wherein propagating a change includes propagating the change without modifying said judgement data.
  • 34. The method of claim 31, wherein associating judgement data with sets of one or more of said documents includes associating a first judgement data that indicates the one or more documents belong to a category in at least one of the first hierarchy and the second hierarchy.
  • 35. The method of claim 31, wherein associating judgement data with sets of one or more of said documents includes associating a first judgement data that indicates the one or more documents do not belong to a category in at least one of the first hierarchy and the second hierarchy.
  • 36. The method of claim 31, wherein associating judgement data with sets of one or more of said documents includes associating a first judgement data that indicates the one or more documents do not belong to any category in at least one of the first hierarchy and the second hierarchy.
  • 37. The method of claim 31, wherein associating judgement data with sets of one or more of said documents includes associating a first judgement data with a first set of one or more documents in the first directory, and associating a second judgement data with a second set of one or more documents in the second directory, wherein the first judgement data is different than the second judgement data.
  • 38. The method of claim 37, wherein the step of generating said second directory is performed at least in part by mapping one or more documents to categories in said second hierarchy based, at least in part, on said second judgement data when said second judgement data conflicts with said first judgement data for said one or more documents.
  • 39. The method of claim 31, further comprising the step of assigning a priority value to at least some of said judgement data that is assigned to different documents.
  • 40. The method of claim 39, wherein the step of associating judgement data with sets of one or more of said documents includes selecting a first judgement data over a second judgement data to be associated with one of said sets based on the priority value of the first judgement data relative to the second judgement data.
  • 41. The method of claim 31, further comprising:generating a third directory created based on the first directory; wherein the third directory categorizes said documents based on a third hierarchy of categories; and wherein the step of generating said third directory based on the first directory is performed by mapping said documents to categories in said third hierarchy based, at least in part, on said judgement data; wherein the judgement data for generating said third directory is different than the judgement data for generating said second directory.
  • 42. The method of claim 41, wherein in response one or more changes being made to the first directory, the method further comprises automatically propagating said changes from the first directory to the second directory and to the third directory.
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Entry
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