XQuery Extension Modules - eXist: A NoSQL Database and Application Development Platform - page 511

xquery version "1.0" ;
import module namespace md = "http://exist-db.org/metadata" ;
md:document-by-pair ( "roll-number" , "12345" )
Other available functions in the metadata module include md:set-value-by-url ,
md:uuid , md:uuid-by-url , md:document-by-uuid , md:keys-by-url , md:get-value ,
md:get-value-by-url , md:search , and md:delete .
ngram
Description
NGram index-related functions
Namespace
ngram="http://exist-db.org/xquery/ngram"
Type/default status
Java; enabled in $EXIST_HOME/conf.xml
Class
org.exist.xquery.modules.ngram.NGramModule
This module supports using an NGram index in XPath queries. Use of this module is
explained in “Using the NGram Indexes” on page 280 .
repo
Description
Working with the EXPath repository manager
Namespace
repo="http://exist-db.org/xquery/repo"
Type/default status
Java; enabled in $EXIST_HOME/conf.xml
Class
org.exist.xquery.modules.expathrepo.ExpathPackageModule
This module allows you to manage the local EXPath package repository of your eXist
installation. The package repository manages external packages ( .xar archives), which
can include everything from third-party XQuery libraries to full applications or other
XML technology functionality.