Difference between revisions of "Index Module"

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| valign='top' | '''Summary'''
 
| valign='top' | '''Summary'''
|Returns information about possible facets and facet values on a database in document structure format. {{Mono|$db}} may either be a string or a node stored in a database.<br/>If {{Mono|$type}} is specified as {{Mono|flat}}, the function returns this information in a flat summarized version.
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|Returns information about possible facets and facet values on a database in document structure format. {{Mono|$db}} may either be an <code>xs:string</code>, denoting the database name, or a node stored in the database.<br/>If {{Mono|$type}} is specified as {{Mono|flat}}, the function returns this information in a flat summarized version.
 
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| valign='top' | '''Errors'''
 
| valign='top' | '''Errors'''
|<b>[[XQuery Errors#BaseX Errors|BASX0021]]</b> is raised if the index is not available or doesn't have the needed information.<br/>
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|'''[[XQuery Errors#BaseX Errors|BASX0002]]''' is raised if {{Mono|$db}} is a node that is not stored in a database.<br/>'''[[XQuery Errors#BaseX Errors|BASX0003]]''' is raised if the addressed database {{Mono|$db}} cannot be opened.<br/>'''[[XQuery Errors#BaseX Errors|BASX0021]]''' is raised if the index is not available or doesn't have the needed information.<br/>
 
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| valign='top' | '''Examples'''
 
| valign='top' | '''Examples'''

Revision as of 16:00, 27 December 2011

This module is introduced with BaseX Template:Mark and contains XQuery functions for handling informations coming directly from the indexes within XQuery. All functions are introduced with the index: prefix, which is linked to the http://www.basex.org/modules/index namespace.

General Functions

index:facets

Signatures index:facets($db as item()) as xs:string
index:facets($db as item(), $type as xs:string) as xs:string
Summary Returns information about possible facets and facet values on a database in document structure format. $db may either be an xs:string, denoting the database name, or a node stored in the database.
If $type is specified as flat, the function returns this information in a flat summarized version.
Errors BASX0002 is raised if $db is a node that is not stored in a database.
BASX0003 is raised if the addressed database $db cannot be opened.
BASX0021 is raised if the index is not available or doesn't have the needed information.
Examples
  • index:facets("DB") returns information about facets and facet values on the database DB in document structure.
  • index:facets("DB", "flat") returns information about facets and facet values on the database DB in a summarized flat structure.