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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. ==Overview==* [[XQuery 3.0]]: supported features of the upcoming [http://www.w3.org/TR/xquery-30/ XQuery 3.0] and [http://www.w3.org/TR/xpath20/ XPath 2.0] Recommendations* [[Packaging]]: Based on the [http://expath.org/modules/pkg/ EXPath Packaging System]* [[Full-Text]]: full-text features of XQuery* [[Update]]: update mechanism of XQuery* [[Java Bindings]]: how to call Java code from XQuery* [[XQuery Errors|Errors]]: errors raised by XQuery expressions ==XQuery Functions== <onlyinclude>{| class="wikitable sortable"|-! Module! Description! Prefix! Namespace URI|-| [[Database Functions|Database]]| Accessing the database and indexes.| <code>db</code>| <code><nowiki>http://basex.org/db</nowiki></code>|-| [[File Functions|File]]| File handling, based on the upcoming new version of the [http://expath.org/spec/file EXPath File] module.| <code>file</code>| <code><nowiki>http://expath.org/ns/file</nowiki></code>|-| [[Full-Text Functions|Full-Text]]| Functions for performing full-text operations.| <code>ft</code>| <code><nowiki>http://basex.org/ft</nowiki></code>|-| [[HTTP Functions|HTTP]]| Sending HTTP requests, based on the [http://expath.org/spec/http-client EXPath HTTP] module.| <code>http</code>| <code><nowiki>http://expath.org/ns/http-client</nowiki></code>|-| [[JSON Functions|JSON]]| Parsing and serializing [http://www.json.org JSON documents]. <font color='orangered'>Version 6.8</font>| <code>json</code>| <code><nowiki>http://basex.org/json</nowiki></code>|-| [[Map Functions|Map]]| Handling of map structures, based on a preliminary W3C Working Draft.| <code>map</code>| <code><nowiki>http://www.w3.org/2005/xpath-functions/map</nowiki></code>|-| [[Math Functions|Math]]| Mathematical operations, extending the [http://www.w3.org/TR/xpath-functions-30/ W3C Working Draft].| <code>math</code>| <code><nowiki>http://www.w3.org/2005/xpath-functions/math</nowiki></code>|-| [[SQL Functions|SQL]]| JDBC bridge to access relational databases. <font color='orangered'>Version 6.8</font>| <code>sql</code>| <code><nowiki>http://basex.org/sql</nowiki></code>|-| [[Utility Functions|Utility]]| Utility functions, used for data conversions, profiling and dynamic evaluation.| <code>eval</code>| <code><nowiki>http://basex.org/util</nowiki></code>|-| [[XSLT Functions|XSLT]]| Stylesheet transformations, based on Java’s and Saxon’s XSLT processor.| <code>xslt</code>| <code><nowiki>http://basex.org/xslt</nowiki></code>|-| [[ZIP Functions|ZIP]]| ZIP functionality, based on the [http://expath.org/spec/zip EXPath ZIP] module.| <code>zip</code>| <code><nowiki>http://expath.org/ns/zip</nowiki></code>|} 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 [http://www.w3.org/TR/xpath-functions-30/ XQuery 3.0 Functions and Operators] draft; they are [[XQuery_3.0#REDIRECT Functions|all supported by BaseX]]. ==Indexes==Queries will be analyzed and optimized for index access on the fly. *[[Indexes|Overview]]: All indexes and their functionality*[[Execution Plan]]: Execution plans of the queries [[Category:XQuery]]
