Markup Languages have attained wide popularity in recent years. One type of markup language, Extensible Markup Language (XML), is a universal language that provides a way to identify, exchange, and process various kinds of data. For example, XML is used to create documents that can be utilized by a variety of application programs. Elements of an XML file have an associated namespace and schema.
In XML, a namespace is a unique identifier for a collection of names that are used in XML documents as element types and attribute names. The name of a namespace is commonly used to uniquely identify each class of XML document. The unique namespaces differentiate markup elements that come from different sources and happen to have the same name.
XML Schemata provide a way to describe and validate data in an XML environment. A schema states what elements and attributes are used to describe content in an XML document, where each element is allowed, what types of text contents are allowed within it and which elements can appear within which other elements. The use of schemata ensures that the document is structured in a consistent manner. Schemata may be created by a user and generally supported by an associated markup language, such as XML. By using an XML editor, the user can manipulate the XML file and generate XML documents that adhere to the schema the user has created. XML documents may be created to adhere to one or more schemata.
The XML standard is considered by many as the ASCII format of the future, due to its expected pervasiveness throughout the hi-tech industry in the coming years. Recently, some word-processors have begun producing documents that are somewhat XML compatible. For example, some documents may be parsed using an application that understands XML. However, much of the functionality available in word processor documents is not currently available for XML documents.
The present invention is generally directed towards a method for storing header and footer information in a markup language (ML) document such as an XML document. Headers and footers may be generally understood as simple “mini-documents” that show up at the top and/or bottom of each page in a particular section of a document. Headers and footers simplify functions such as page numbering and template functions for providing a logo on each page of a document.
More particularly, the present invention relates to representing header and footer information in ML so that applications capable of reading a given ML file format, but running in environments where the header and footer generation information has not been installed, are able to still render the header and footer structures. The ML document may be manipulated on a server or anywhere even when the application creating the ML document is not present. Header and footer information (i.e., properties) are saved in a markup language (ML) document without data loss, while allowing the header and footer structures to be parsed by ML-aware applications and to be read by ML programmers.
Throughout the specification and claims, the following terms take the meanings explicitly associated herein, unless the context clearly dictates otherwise.
The terms “markup language” or “ML” refer to a language for special codes within a document that specify how parts of the document are to be interpreted by an application. In a word-processor file, the markup language specifies how the text is to be formatted or laid out, whereas in a particular customer schema, the ML tends to specify the text's meaning according to that customer's wishes (e.g., customerName, address, etc). The ML is typically supported by a word-processor and may adhere to the rules of other markup languages, such as XML, while creating further rules of its own.
The term “element” refers to the basic unit of an ML document. The element may contain attributes, other elements, text, and other building blocks for an ML document.
The term “tag” refers to a command inserted in a document that delineates elements within an ML document. Each element can have no more than two tags: the start tag and the end tag. It is possible to have an empty element (with no content) in which case one tag is allowed.
The content between the tags is considered the element's “children” (or descendants). Hence, other elements embedded in the element's content are called “child elements” or “child nodes” or the element. Text embedded directly in the content of the element is considered the element's “child text nodes”. Together, the child elements and the text within an element constitute that element's “content”.
The term “attribute” refers to an additional property set to a particular value and associated with the element. Elements may have an arbitrary number of attribute settings associated with them, including none. Attributes are used to associate additional information with an element that will not contain additional elements, or be treated as a text node.
Illustrative Operating Environment
With reference to
Computing device 100 may have additional features or functionality. For example, computing device 100 may also include additional data storage devices (removable and/or non-removable) such as, for example, magnetic disks, optical disks, or tape. Such additional storage is illustrated in
Computing device 100 may also contain communication connections 116 that allow the device to communicate with other computing devices 118, such as over a network. Communication connection 116 is one example of communication media. Communication media may typically be embodied by computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and includes any information delivery media. The term “modulated data signal” means a signal that has one or more of its characteristics set or changed in such a manner as to encode information in the signal. By way of example, and not limitation, communication media includes wired media such as a wired network or direct-wired connection, and wireless media such as acoustic, RF, infrared and other wireless media. The term computer readable media as used herein includes both storage media and communication media.
Generally, the present invention is directed at representing header and footer structures in an ML document. The ML document may be read by applications that do not share the same schema that created the document.
In one embodiment, word-processor 120 has its own namespace or namespaces and a schema, or a set of schemas, that is defined for use with documents associated with word-processor 120. The set of tags and attributes defined by the schema for word-processor 120 define the format of a document to such an extent that it is referred to as its own native ML. Word-processor 120 internally validates ML file 210. When validated, the ML elements are examined as to whether they conform to the ML schema 215. A schema states what tags and attributes are used to describe content in an ML document, where each tag is allowed, and which tags can appear within other tags, ensuring that the documentation is structured the same way. Accordingly, ML 210 is valid when structured as set forth in arbitrary ML schema 215.
ML validation engine 225 operates similarly to other available validation engines for ML documents. ML validation engine 225 evaluates ML that is in the format of the ML validation engine 225. For example, XML elements are forwarded to an XML validation engine. In one embodiment, a greater number of validation engines may be associated with word-processor 120 for validating a greater number of ML formats.
Storing Header and Footer Information in a Markup Language Document
The present invention generally provides a method to represent an application's header and footer information in markup language (ML) such as XML. The header and footer structures may be parsed by applications that understand the markup other than the application that generated the ML file.
Headers and footers are used for a number of different applications. In one example, a footer is used to show the page number at the bottom of each page (like in this actual document), the author of the document may choose to create a footer. The footer is a “mini-document” that appears at the bottom of each page. A field is placed in the generated mini-document that instructs the footer to display the current page. With the use of the footer, a single mini-document is generated, but each time the mini-document appears, it shows the page number of that page. In another example, an author chooses to include the language “confidential” at the top of each page. To generate the “confidential” language on each page, a header is generated. The “mini-document” that is the header, therefore includes the text “confidential”. As a result, each page includes a view of this mini-document such that the top of each page reads “confidential”.
Analyzing the example shown in
Headers and footers are specific to a particular section. Many documents only consist of one section, but that is not always the case. Because documents may include more than one section, the header and footer information is stored with the section properties. There are two elements in the section properties tag: <hdr> and <ftr>. These are option elements, and they are each of type hdrElt and ftrElt respectively. In one embodiment, the types of option elements are substantially the same, but the schema defines them separately.
The hdrElt shown in the example ML file includes the following:
In one embodiment, the definitions for the header and footer elements are substantially the same as those of the body element of the document. Accordingly, headers and footers may be described as “mini-documents” due to their similarity to the body element.
In one embodiment, a type attribute is associated with the header or footer. The type attribute provides functionality for multiple headers & footers to be associated with any one section. In one example, the type attribute may be set up such that a header only appears on even pages; only appears on odd pages; or only appears on the first page.
Analyzing the example shown in
The following is an exemplary portion of schema that includes the section properties element as well as the schema for generating the header and footer mini-documents along with the type attribute, in accordance with aspects of the present invention:
At decision block 530, a determination is made whether a mini-document corresponds to a header or a footer. When the mini-document being examined is a header, processing moves to block 540. However, if the mini-document is not a header, the mini-document is a footer and processing moves to block 550. In another embodiment, the mini-document information may describe other structures than headers and footers.
At block 540, the properties of the header (when the mini-document is a header) are mapped into elements, attributes, and values of the ML file. As an example, the header may include a mini-document that displays the text “confidential” at the top of each page. Three elements that may be used in mapping the properties of a header include the cfChunkElt, the pElt, and tblElt elements (see Table 1). The headers and the properties associated with the headers may change from page to page, section to section, chapter to chapter and the like. There may be more than one mapping, therefore, per document. Once the header properties are mapped, or written to the ML file, processing advances to decision block 560.
Returning to block 550, the properties of the footer (when the mini-document is a footer) are mapped into elements, attributes, and values. Exemplary elements used in mapping the properties of a footer include the cfChunkElt, the pElt, and tblElt elements (see Table 1). As previously stated, the footers and the properties associated with the footers may change from page to page, section to section, chapter to chapter and the like. There may be more than one mapping, therefore, per document. After the footer properties are mapped, processing advances to decision block 560.
At decision block 560, a determination is made whether all the mini-documents of the document have had their properties mapped to elements, attributes, and values. If not all of the mini-documents have been processed, processing returns to block 530 where the next mini-document is examined to determine whether the mini-document is a header. However, if all the mini-documents have been processed, then the process then moves to block 570.
At block 570, the properties of the mini-documents are stored in a ML document that may be read by applications that understand the ML. Once the properties are stored, processing moves to end block 580 and returns to processing other actions.
In another embodiment, the properties of each mini-document are mapped to elements, attributes, and values without a distinction being made between headers and footers.
The above specification, examples and data provide a complete description of the manufacture and use of the composition of the invention. Since many embodiments of the invention can be made without departing from the spirit and scope of the invention, the invention resides in the claims hereinafter appended.
This patent application is a continuation-in-part application under 35 United States Code § 120 of U.S. patent application Ser. No. 10/187,060 filed on Jun. 28, 2002 now U.S. Pat. No. 7,523,394, which is incorporated herein by reference. An exemplary schema in accordance with the present invention is disclosed beginning on page 11 in an application entitled “Mixed Content Flexibility,” Ser. No. 10/726,077, filed Dec. 2, 2003, which is hereby incorporated by reference in its entirety.
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Number | Date | Country | |
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Parent | 10187060 | Jun 2002 | US |
Child | 10731242 | US |