Use this function to return XPath referencing the ID for the entry. This ID is used as the reference for the document. Either this function or getEntryId must result in a valid reference. The function is not called if getEntryId has already returned a valid reference.

Inputs: xml (XmlDocument), document (Document)
Outputs: xpath (string)
See also: [prefix_]getEntryId


function myPrefix_getEntryIdXPath(xml, document)
   return "~/atom:id"