Have you checked out this link?
http://sleroyblog.wordpress.com/2013/04/09/querying-rqm-40-through-oslc-and-rest-api/#cs_create_thru_rest

Hi Lakshmanan,

Below is the syntax for Execution Result xml. You can even run a testcase and create execution result in RQM UI. Then do a GET of that execution result. This will give you the xml syntax. We also have a java based open source utility which you can refer. You can get it in https://jazz.net/wiki/bin/view/Main/RqmApi#RQM_API_Utility

<?xml version="1.0" encoding="UTF-8"?>
<ns2:executionresult xmlns:ns2="http://jazz.net/xmlns/alm/qm/v0.1/" xmlns:ns1="http://schema.ibm.com/vega/2008/" xmlns:ns3="http://purl.org/dc/elements/1.1/" xmlns:ns4="http://jazz.net/xmlns/prod/jazz/process/0.6/" xmlns:ns5="http://jazz.net/xmlns/alm/v0.1/" xmlns:ns6="http://purl.org/dc/terms/" xmlns:ns7="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:ns8="http://jazz.net/xmlns/alm/qm/v0.1/tsl/v0.1/" xmlns:ns9="http://jazz.net/xmlns/alm/qm/v0.1/testscript/v0.1/" xmlns:ns10="http://jazz.net/xmlns/alm/qm/qmadapter/task/v0.1" xmlns:ns11="http://jazz.net/xmlns/alm/qm/qmadapter/v0.1" xmlns:ns12="http://jazz.net/xmlns/alm/qm/v0.1/executionworkitem/v0.1" xmlns:ns13="http://open-services.net/ns/core#" xmlns:ns14="http://open-services.net/ns/qm#" xmlns:ns15="http://jazz.net/xmlns/prod/jazz/rqm/process/1.0/" xmlns:ns16="http://jazz.net/xmlns/alm/qm/v0.1/executionresult/v0.1" xmlns:ns17="http://jazz.net/xmlns/alm/qm/v0.1/catalog/v0.1" xmlns:ns19="http://jazz.net/xmlns/alm/qm/styleinfo/v0.1/" xmlns:ns20="http://www.w3.org/1999/XSL/Transform">
  <ns2:projectArea alias="JKE+Banking+%28Quality+Management%29" href="https://rqmx64d.rtp.raleigh.ibm.com:9444/qm/resource/itemOid/com.ibm.team.process.ProjectArea/_0I6VT9HVEeGSWYp6WoHgWA"/>
 
  <ns3:title>Allocate_Dividends_to_a_Single_Cause_InternetExplorer_DB2_WAS_Windows_S1</ns3:title>
 
  <ns5:state>com.ibm.rqm.execution.common.state.pass</ns5:state>

  <ns2:variables/>


  <ns16:weight>125</ns16:weight>
  <ns16:pointspassed>125</ns16:pointspassed>
  <ns16:pointsfailed>0</ns16:pointsfailed>
  <ns16:pointsattempted>125</ns16:pointsattempted>
  <ns16:pointsblocked>0</ns16:pointsblocked>
  <ns16:pointsinconclusive>0</ns16:pointsinconclusive>
  <ns2:pointspermfailed>0</ns2:pointspermfailed>
  <ns2:pointsdeferred>0</ns2:pointsdeferred>

  <ns16:stepResults>
    <ns16:stepResult ns1:id="_90YfgtHWEeGSWYp6WoHgWA" stepIndex="1" href="https://localhost:9444/qm/service/com.ibm.rqm.integration.service.IIntegrationService/resources/JKE+Banking+%28Quality+Management%29/executionelementresult/_90YfgtHWEeGSWYp6WoHgWA" result="com.ibm.rqm.execution.common.state.pass">
      <ns16:result>com.ibm.rqm.execution.common.state.pass</ns16:result>
      <ns16:description>
        <div:div xmlns:div="http://www.w3.org/1999/xhtml" xmlns="http://www.w3.org/1999/xhtml">
          <div xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:w="urn:schemas-microsoft-com:office:word">JKE Login</div>
        </div:div>
      </ns16:description>
      <ns16:stepType>com.ibm.rqm.execution.common.elementtype.keyword</ns16:stepType>
      <ns16:comment/>
      <ns16:compare/>
      <ns16:stepResults>
        <ns16:stepResult ns1:id="_90YfjNHWEeGSWYp6WoHgWA" stepIndex="1" href="https://localhost:9444/qm/service/com.ibm.rqm.integration.service.IIntegrationService/resources/JKE+Banking+%28Quality+Management%29/executionelementresult/_90YfjNHWEeGSWYp6WoHgWA" endTime="2012-07-19T19:22:16.194Z" result="com.ibm.rqm.execution.common.state.passed" startTime="2012-07-19T19:21:40.194Z">
          <ns16:result>com.ibm.rqm.execution.common.state.passed</ns16:result>
          <ns16:expectedResult>
            <div:div xmlns:div="http://www.w3.org/1999/xhtml" xmlns="http://www.w3.org/1999/xhtml">Accounts Overview screen appears <br/>
              <a href="https://localhost:9444/qm/service/com.ibm.rqm.planning.service.internal.rest.IAttachmentRestService/_4tv84dHWEeGSWYp6WoHgWA">
                <img src="https://localhost:9444/qm/service/com.ibm.rqm.planning.service.internal.rest.IAttachmentRestService/_4tv84dHWEeGSWYp6WoHgWA" alt="1b_Accounts_Overview.png" border="0" id="_4tv84dHWEeGSWYp6WoHgWA"/>
              </a> </div:div>
          </ns16:expectedResult>
          <ns16:actualResult>
            <div:div xmlns:div="http://www.w3.org/1999/xhtml" xmlns="http://www.w3.org/1999/xhtml">User logged in successfully.</div:div>
          </ns16:actualResult>
          <ns16:description>
            <div:div xmlns:div="http://www.w3.org/1999/xhtml" xmlns="http://www.w3.org/1999/xhtml">Log into JKE Banking with <b>username</b> jbrown and <b>password</b> jbrown. </div:div>
          </ns16:description>
          <ns16:stepType>com.ibm.rqm.execution.common.elementtype.execution</ns16:stepType>
          <ns16:comment/>
        </ns16:stepResult>
      </ns16:stepResults>
    </ns16:stepResult>
    <ns16:stepResult ns1:id="_90YfmNHWEeGSWYp6WoHgWA" stepIndex="2" href="https://localhost:9444/qm/service/com.ibm.rqm.integration.service.IIntegrationService/resources/JKE+Banking+%28Quality+Management%29/executionelementresult/_90YfmNHWEeGSWYp6WoHgWA" endTime="2012-07-19T19:22:57.194Z" result="com.ibm.rqm.execution.common.state.passed" startTime="2012-07-19T19:22:16.194Z">
     
      <ns16:result>com.ibm.rqm.execution.common.state.passed</ns16:result>
      <ns16:expectedResult>
        <div:div xmlns:div="http://www.w3.org/1999/xhtml" xmlns="http://www.w3.org/1999/xhtml">
          <b>Account Details screen</b> appears </div:div>
      </ns16:expectedResult>
      <ns16:actualResult>
        <div:div xmlns:div="http://www.w3.org/1999/xhtml" xmlns="http://www.w3.org/1999/xhtml">Account Details screen appeared.</div:div>
      </ns16:actualResult>
      <ns16:description>
        <div:div xmlns:div="http://www.w3.org/1999/xhtml" xmlns="http://www.w3.org/1999/xhtml">Select <b>Money Market Savings Account</b>
          <br/>
           </div:div>
      </ns16:description>
      <ns16:stepType>com.ibm.rqm.execution.common.elementtype.execution</ns16:stepType>
      <ns16:comment/>
    </ns16:stepResult>
    </ns16:stepResults>
  <ns2:testcase href="https://localhost:9444/qm/service/com.ibm.rqm.integration.service.IIntegrationService/resources/JKE+Banking+%28Quality+Management%29/testcase/urn:com.ibm.rqm:testcase:19"/>
  <ns2:testscript href="https://localhost:9444/qm/service/com.ibm.rqm.integration.service.IIntegrationService/resources/JKE+Banking+%28Quality+Management%29/testscript/urn:com.ibm.rqm:testscript:20"/>
  <ns2:executionworkitem href="https://localhost:9444/qm/service/com.ibm.rqm.integration.service.IIntegrationService/resources/JKE+Banking+%28Quality+Management%29/executionworkitem/urn:com.ibm.rqm:executionworkitem:3"/>
 
</ns2:executionresult>