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XML::XQL::Tutorial 0.68

  Date Added: July 01, 2010  |  Visits: 834

XML::XQL::Tutorial

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XML::XQL::Tutorial is a Perl module that describes the XQL query syntax. This document describes basic the features of the XML Query Language (XQL.) A proposal for the XML Query Language (XQL) specification was submitted to the XSL Working Group in September 1998. The spec can be found at http://www.w3.org/TandS/QL/QL98/pp/xql.html. Since it is only a proposal at this point, things may change, but it is very likely that the final version will be close to the proposal. Most of this document was copied straight from the spec. See also the XML::XQL man page. XQL (XML Query Language) provides a natural extension to the XSL pattern language. It builds upon the capabilities XSL provides for identifying classes of nodes, by adding Boolean logic, filters, indexing into collections of nodes, and more. XQL is designed specifically for XML documents. It is a general purpose query language, providing a single syntax that can be used for queries, addressing, and patterns. XQL is concise, simple, and powerful. XQL is designed to be used in many contexts. Although it is a superset of XSL patterns, it is also applicable to providing links to nodes, for searching repositories, and for many other applications. Note that the term XQL is a working term for the language described in this proposal. It is not their intent that this term be used permanently. Also, beware that another query language exists called XML-QL, which uses a syntax very similar to SQL. The XML::XQL module has added functionality to the XQL spec, called XQL+. To allow only XQL functionality as described in the spec, use the XML::XQL::Strict module. Note that the XQL spec makes the distinction between core XQL and XQL extensions. This implementation makes no distinction and the Strict module, therefore, implements everything described in the XQL spec. See the XML::XQL man page for more information about the Strict module. This tutorial will clearly indicate when referring to XQL+..

Requirements: No special requirements
Platforms: Linux
Keyword: Describes Language Libraries Module Perl Perl Module Query Query Language Spec Xml Xml Query Language Xmlxqltutorial Xql Query Xsl
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License: Freeware Size: 112.64 KB
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