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. 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. | 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. | ||
| − | == | + | ==Features== |
* [[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 | * [[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] | * [[Packaging]]: Based on the [http://expath.org/modules/pkg/ EXPath Packaging System] | ||
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* [[Java Bindings]]: how to call Java code from XQuery | * [[Java Bindings]]: how to call Java code from XQuery | ||
* [[XQuery Errors|Errors]]: errors raised by XQuery expressions | * [[XQuery Errors|Errors]]: errors raised by XQuery expressions | ||
| + | * [[Indexes|Overview]]: Index structures utilized by the XQuery optimizer | ||
| + | * [[Execution Plan]]: Examplary query execution plans | ||
==XQuery Functions== | ==XQuery Functions== | ||
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[http://www.w3.org/TR/xpath-functions-30/ XQuery 3.0 Functions and Operators] draft. | [http://www.w3.org/TR/xpath-functions-30/ XQuery 3.0 Functions and Operators] draft. | ||
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| <code><nowiki>http://expath.org/ns/zip</nowiki></code> | | <code><nowiki>http://expath.org/ns/zip</nowiki></code> | ||
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[[Category:XQuery]] | [[Category:XQuery]] | ||
Revision as of 07:09, 22 September 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.
Features
- XQuery 3.0: supported features of the upcoming XQuery 3.0 and XPath 2.0 Recommendations
- Packaging: Based on the EXPath Packaging System
- Full-Text: full-text features of XQuery
- Update: update mechanism of XQuery
- Java Bindings: how to call Java code from XQuery
- Errors: errors raised by XQuery expressions
- Overview: Index structures utilized by the XQuery optimizer
- Execution Plan: Examplary query execution plans
XQuery Functions
The namespaces of the following function sets are statically bound in BaseX, i.e., they need not (but may) be declared in the query prolog. All new XQuery 3.0 functions are all supported by BaseX. They are listed in the XQuery 3.0 Functions and Operators draft.
| Module | Description | Prefix | Namespace URI |
|---|---|---|---|
| Database | Accessing the database and indexes. | db
|
http://basex.org/db
|
| File | File handling, based on the upcoming new version of the EXPath File module. | file
|
http://expath.org/ns/file
|
| Full-Text | Functions for performing full-text operations. | ft
|
http://basex.org/ft
|
| HTTP | Sending HTTP requests, based on the EXPath HTTP module. | http
|
http://expath.org/ns/http-client
|
| JSON | Parsing and serializing JSON documents. Version 6.8 | json
|
http://basex.org/json
|
| Map | Handling of map structures, based on a preliminary W3C Working Draft. | 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
|
| SQL | JDBC bridge to access relational databases. Version 6.8 | sql
|
http://basex.org/sql
|
| Utility | Utility functions, used for data conversions, profiling and dynamic evaluation. | eval
|
http://basex.org/util
|
| XSLT | Stylesheet transformations, based on Java’s and Saxon’s XSLT processor. | xslt
|
http://basex.org/xslt
|
| ZIP | ZIP functionality, based on the EXPath ZIP module. | zip
|
http://expath.org/ns/zip
|
