Hi Indrajeect, Your $params variable is an element (the serialization of a map), not a map. You can use the map constructor function to convert the XML serialization of a map to map:
return map:keys(map:map($params)) Thanks. -jb From: Indrajeet Verma <[email protected]<mailto:[email protected]>> Reply-To: MarkLogic Developer Discussion <[email protected]<mailto:[email protected]>> Date: Tuesday, April 28, 2015 at 3:05 PM To: MarkLogic Developer Discussion <[email protected]<mailto:[email protected]>> Subject: [MarkLogic Dev General] Error in getting map keys in ML8 Hi, Could somebody help me what I am missing in below query. I am using this code in ML8 let $params := <map:map xmlns:map="http://marklogic.com/xdmp/map"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xmlns:xs="http://www.w3.org/2001/XMLSchema";> <map:entry key="USERSESSION:483d4d2f1a54a7f0eb42f6f1dfa6518c|4/29/2015 3:41:5 AM"> <map:value> <map:map> <map:entry key="user"> <map:value> <user-profile wk-pid="USR-b740cbc5-5e27-8b1c-d97a-1329625f6b39"> <docType>Users</docType> <username type="string" >USR-b740cbc5-5e27-8b1c-d97a-1329625f6b39</username> </user-profile> </map:value> </map:entry> <map:entry key="session"> <map:value> <session wk-pid="483d4d2f1a54a7f0eb42f6f1dfa6518c|4/29/2015 3:41:5 AM"> <username>USR-b740cbc5-5e27-8b1c-d97a-1329625f6b39</username> <created>2015-04-28T23:41:05.172+05:30</created> </session> </map:value> </map:entry> </map:map> </map:value> </map:entry> </map:map> return map:keys($params) Error that I am seeing, [1.0-ml] XDMP-ARGTYPE: (err:XPTY0004) map:keys(<map:map xmlns:xs="http://www.w3.org/2001/XMLSchema"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xmlns:map="http://marklogic.com/xdmp/map";><map:entry key="USERSESSION:483d4d2f1a54a7f0eb42f6f1dfa6518c|4/2...</map:map>) -- arg1 is not of type map:map
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