Difference between revisions of "Querying"

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Welcome to the Query Portal, which is one of the [[Main Page|Main Sections]] of this documentation. BaseX provides an implementation of the W3 [http://www.w3.org/TR/xpath-30/ XPath] and [http://www.w3.org/TR/xquery-30 XQuery] languages, which are tightly coupled with the underlying database store. High conformance is one of our main objectives, as the results of the [http://dev.w3.org/2006/xquery-test-suite/PublicPagesStagingArea/XQTSReportSimple_XQTS_1_0_2.html XQuery Test Suite] demonstrate. This section contains general information on the query processor and its numerous extensions.
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Welcome to the Query Portal, which is one of the [[Main Page|Main Sections]] of this documentation. BaseX provides an implementation of the W3 [http://www.w3.org/TR/xpath-30/ XPath] and [http://www.w3.org/TR/xquery-30 XQuery] languages, which are tightly coupled with the underlying database store. High conformance with the official specifications is one of our main objectives, as the results of the [http://dev.w3.org/2006/xquery-test-suite/PublicPagesStagingArea/XQTSReportSimple_XQTS_1_0_2.html XQuery Test Suite] demonstrate. This section contains general information on the query processor and its numerous extensions.
  
 
==Features==
 
==Features==

Revision as of 17:00, 28 January 2012

Welcome to the Query Portal, which is one of the Main Sections of this documentation. BaseX provides an implementation of the W3 XPath and XQuery languages, which are tightly coupled with the underlying database store. High conformance with the official specifications is one of our main objectives, as the results of the XQuery Test Suite demonstrate. This section contains general information on the query processor and its numerous extensions.

Features

  • XQuery 3.0: supported features of the upcoming XQuery 3.0 Recommendation
  • Full-Text: XPath/XQuery Full Text extends the language with powerful retrieval features.
  • Updates: Databases can be modified via the XQuery Update extension
  • Java Bindings: described how Java code can be accessed and called from XQuery
  • Packaging: allows to embed external function modules, based on the EXPath Packaging System
  • Errors: errors raised by XQuery expressions
  • Serialization: serialization parameters supported by BaseX

Modules

The namespaces of the following XQuery modules are statically bound in BaseX, i.e., they need not (but may) be declared in the query prolog.

Module Description Prefix Namespace URI
Cryptography Cryptographic functions, based on the EXPath Cryptograhic module. Version 7.0 crypto http://expath.org/ns/crypto
Database Functions for accessing and updating databases. db http://basex.org/modules/db
File File handling, based on the latest draft of the EXPath File module. file http://expath.org/ns/file
Full-Text Functions for performing full-text operations. ft http://basex.org/modules/ft
HTTP Sending HTTP requests, based on the EXPath HTTP module. http http://expath.org/ns/http-client
Index Functions for requesting details on database indexes. Version 7.1 index http://basex.org/modules/index
JSON Parsing and serializing JSON documents. Version 7.0 json http://basex.org/modules/json
Map Functions for handling maps (key/value pairs). map http://www.w3.org/2005/xpath-functions/map
Math Mathematical operations, extending the W3C Working Draft. math http://www.w3.org/2005/xpath-functions/math
Packaging Installing, deleting and listing packages. Version 7.1 pkg http://basex.org/modules/repo
SQL JDBC bridge to access relational databases. Version 7.0 sql http://basex.org/modules/sql
Utility Utility functions, used for data conversions, profiling and dynamic evaluation. util http://basex.org/modules/util
XSLT Stylesheet transformations, based on Java’s and Saxon’s XSLT processor. xslt http://basex.org/modules/xslt
ZIP ZIP functionality, based on the EXPath ZIP module. zip http://expath.org/ns/zip