XQuery Extension Modules - eXist: A NoSQL Database and Application Development Platform - page 505

Class
org.exist.xquery.modules.image.ImageModule
This module has functions for performing various operations on images stored in
eXist, like requesting their metadata, width, and height. It can also crop and scale
images and do bulk thumbnail conversions.
Most functions take the image as xs:base64Binary for input. Converting is easy: use
the util:binary-doc function. The following example tells you the height of an
image stored in eXist:
let $ image-uri as xs:anyURI := xs:anyURI ( '/db/some/path/to/an/image/file' )
return
image:get-height ( util:binary-doc ( $ image-uri ))
There is also an example of using this module in “RESTXQ” on page 353 .
inspect
Description
Retrieving xqDoc information from XQuery modules
Namespace
inspect="http://exist-db.org/xquery/inspection"
Type/default status
Java; enabled in $EXIST_HOME/conf.xml
Class
org.exist.xquery.functions.inspect.InspectionModule
This module allows you to inspect XQuery modules and their xqDoc documentation.
More about this can be found in “XQuery Documentation with xqDoc” on page 125 .
jfreechart
Description
Generating charts using the JFreeChart library
Namespace
jfreechart="http://exist-db.org/xquery/jfreechart"
Type/default status
Java; enabled in $EXIST_HOME/conf.xml ; enabled in $EXIST_HOME/extensions/
build.properties