A RESTful browser for eXist Java-Based Function Modules

http://www.w3.org/2005/xpath-functions
A module with the XQuery/XPath Core Library Functions
empty
empty($items as item()*) xs:boolean
Returns true() if the value of $items is the empty sequence, false() otherwise.
$itemsThe item sequence
Returns true() if the empty sequence, false() otherwise
Return to list of all modules