Difference between revisions of "XQuery"

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#REDIRECT [[Querying]]
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Welcome to the Query Portal, which is one of the [[Main Page|main]] sections of this documentation. Here you can find more information on performing XPath and XQuery requests. Apart from standard features, BaseX offers numerous extensions, which are listed on this page.
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==XQuery==
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* [[Full-Text]]: full-text features of XQuery
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* [[Update]]: update mechanism of XQuery
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* [[XQuery 3.0]]: supported features of the upcoming [http://www.w3.org/TR/xquery-30/ W3C XQuery 3.0] Recommendation
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* [[Java Bindings]]: how to call Java code from XQuery
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* [[XQuery Errors|Errors]]: errors raised by XQuery expressions
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==XQuery Functions==
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<onlyinclude>
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{| class="wikitable"
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|-
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! Module
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! Description
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! Prefix
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! Namespace URI
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|-
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| [[Database Functions|Database]]
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| Accessing the database and indexes.
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| <code>db</code>
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| <code><nowiki>http://basex.org/db</nowiki></code>
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|-
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| [[Full-Text Functions|Full-Text]]
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| Performing full-text operations.
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| <code>ft</code>
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| <code><nowiki>http://basex.org/ft</nowiki></code>
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|-
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| [[Utility Functions|Utility]]
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| Testing and profiling functions.
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| <code>util</code>
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| <code><nowiki>http://basex.org/util</nowiki></code>
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|-
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| [[File Functions|File]]
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| File handling, inspired by the [http://expath.org/spec/file EXPath File] module.
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| <code>file</code>
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| <code><nowiki>http://basex.org/file</nowiki></code>
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|-
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| [[ZIP Functions|ZIP]]
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| ZIP, based on the [http://expath.org/spec/zip EXPath ZIP] module. <font color="orange">Version 6.5.2</font>
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| <code>zip</code>
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| <code><nowiki>http://expath.org/ns/zip</nowiki></code>
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|-
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| [[HTTP Functions|HTTP]]
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| Sending HTTP requests, based on the [http://expath.org/spec/http-client EXPath HTTP] module.
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| <code>http</code>
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| <code><nowiki>http://expath.org/ns/http-client</nowiki></code>
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|-
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| [[Math Functions|Math]]
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| Mathematical operations, extending the [http://www.w3.org/TR/xpath-functions-30/ W3C Working Draft].
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| <code>math</code>
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| <code><nowiki>http://www.w3.org/2005/xpath-functions/math</nowiki></code>
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|}
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Note that all namespace URIs are statically bound in BaseX, i.e., they need not be declared in the query prolog.
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All XQuery 3.0 functions are listed in the [http://www.w3.org/TR/xpath-functions-30/ XQuery 3.0 Functions and Operators] draft;
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we have added a [[XQuery_3.0#Functions|list of all new functions]] that are already supported by BaseX.
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==Indexes==
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Queries will be analyzed and optimized for index access on the fly.
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*[[Indexes|Overview]]: All indexes and their functionality
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*[[Execution Plan]]: Execution plans of the queries
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[[Category:XQuery]]

Revision as of 01:18, 14 March 2011

Welcome to the Query Portal, which is one of the main sections of this documentation. Here you can find more information on performing XPath and XQuery requests. Apart from standard features, BaseX offers numerous extensions, which are listed on this page.

XQuery

XQuery Functions

Module Description Prefix Namespace URI
Database Accessing the database and indexes. db http://basex.org/db
Full-Text Performing full-text operations. ft http://basex.org/ft
Utility Testing and profiling functions. util http://basex.org/util
File File handling, inspired by the EXPath File module. file http://basex.org/file
ZIP ZIP, based on the EXPath ZIP module. Version 6.5.2 zip http://expath.org/ns/zip
HTTP Sending HTTP requests, based on the EXPath HTTP module. http http://expath.org/ns/http-client
Math Mathematical operations, extending the W3C Working Draft. math http://www.w3.org/2005/xpath-functions/math

Note that all namespace URIs are statically bound in BaseX, i.e., they need not be declared in the query prolog. All XQuery 3.0 functions are listed in the XQuery 3.0 Functions and Operators draft; we have added a list of all new functions that are already supported by BaseX.

Indexes

Queries will be analyzed and optimized for index access on the fly.