
dls:document-purge( $uri as xs:string, $delete as xs:boolean, $retain-history as xs:boolean ) as xs:string*
This function deletes all numbered versions of the specified
   managed document and its referenced documents, as specified by the retention 
   policies set by 
   dls:retention-rule
   
   .  The document versions are
   deleted if they
   have no retention rule causing them to be kept and if they are not included 
   by documents that cannot yet be deleted. If $delete is 
   false, the document's versions are not actually deleted and instead 
   a list of the documents that would have been deleted is returned. 
   
$retain-history to true, you can use 
   xdmp:document-properties 
    
   to view the deleted document's properties
   fragment in the database. 
  dls-user role is required to run 
    this function, or the privilege:http://marklogic.com/xdmp/privileges/dls-user
    
  xquery version "1.0-ml";
  import module namespace dls = "http://marklogic.com/xdmp/dls" 
      at "/MarkLogic/dls.xqy";
  dls:document-purge("/foo/bar/baz.xml", fn:false(), fn:true())
  (: Returns the versions of the 'baz.xml' document and its referenced 
     documents, as specified by the retention policy. :)