Hi, I started to write an xquery module that performs basic operations over instances of XSD schemes. My needs are basics, I would like to list groups and abstract classes, or define automatic predicat like declare variable $XSD_scheme := doc("my_schem.xsd") declare function IsNodeOfGroup($node, $group as element(xsd:group)) as xs:boolean {..} declare function ListAbstractClassesOf($node as element()) as element(xsd:complexType)* {..} However, I guess that I am reinventing the wheel and such a module surely exists already. Has anybody heard about such a module ? Thanks, Jean-Marc