XQuery/Registered Modules
Motivation
You want to check to see if an module is loaded in your runtime systems.
Method
Some modules that you may need are not loaded into the runtime engine when the server starts. If this is the case you may have to dynamically load a module.
Listing current modules in the runtime
xquery version "1.0"; let $modules := util:registered-modules() return <results>{ for $module in $modules order by $module return <module>{ $module}</module> } </results>
Sample Results
<results> <module>http://exist-db.org/xquery/compression</module> <module>http://exist-db.org/xquery/datetime</module> <module>http://exist-db.org/xquery/examples</module> <module>http://exist-db.org/xquery/file</module> <module>http://exist-db.org/xquery/httpclient</module> <module>http://exist-db.org/xquery/image</module> <module>http://exist-db.org/xquery/mail</module> <module>http://exist-db.org/xquery/math</module> <module>http://exist-db.org/xquery/ngram</module> <module>http://exist-db.org/xquery/request</module> <module>http://exist-db.org/xquery/response</module> <module>http://exist-db.org/xquery/scheduler</module> <module>http://exist-db.org/xquery/session</module> <module>http://exist-db.org/xquery/sql</module> <module>http://exist-db.org/xquery/system</module> <module>http://exist-db.org/xquery/text</module> <module>http://exist-db.org/xquery/transform</module> <module>http://exist-db.org/xquery/util</module> <module>http://exist-db.org/xquery/validation</module> <module>http://exist-db.org/xquery/xmldb</module> <module>http://exist-db.org/xquery/xmldiff</module> <module>http://www.w3.org/2005/xpath-functions</module> </results>