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All files in Whenever a RESTXQ URL is requested, the webapp [[Options#RESTXQPATH|RESTXQPATH]] module directory and its sub-directories will be scanned for modules with the extension REST annotations. RESTful functions may occur in library modules (Extension: {{Code|*.xqm}} ) and (since {{Version|7.7}}) main modules (Extension: {{Code|*.xq}} will be parsed for RESTXQ annotations and cached). If the timestamp of a Each function module changes, it will be cached and parsed again. The RESTXQ module directory can be changed via the {{Code|RESTXQPATH}} option (see [[Web Application#Configuration|Web Application: Configuration]] for more details)when its timestamp changes.
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All RESTXQ [[XQuery 3.0#Annotations|annotations]] are assigned to the {{Code|http://exquery.org/ns/restxq}} namespace, which is statically bound to the {{Code|restxq}} prefix. A ''Resource Function'' is an XQuery function that has been marked up with RESTXQ annotations. When an HTTP request comes in, a resource function will be invoked that matches the constraints indicated by its annotations.
A simple RESTXQ module is shown below, it is part of a clean installation and available at http://localhost:8984/restxq/ .
