what is the resource representations to get RDF file for test artifact resources of RQM using OSLC API

This is an example of Test Result RDF document through QM OSLC API.
Make sure you specify this headers to get the content
accept : application/rdf+xml
OSLC-Core-Version: 2.0

<?xml version="1.0" encoding="UTF-8"?>
<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:rqm_auto="http://jazz.net/ns/auto/rqm#"
    xmlns:calm="http://jazz.net/xmlns/prod/jazz/calm/1.0/"
    xmlns:rqm_qm="http://jazz.net/ns/qm/rqm#"
    xmlns:acp="http://jazz.net/ns/acp#"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:oslc_auto="http://open-services.net/ns/auto#"
    xmlns:oslc="http://open-services.net/ns/core#"
    xmlns:oslc_qm="http://open-services.net/ns/qm#"
    xmlns:bp="http://open-services.net/ns/basicProfile#" >
 <rdf:Description rdf:about="https://myrqmserver:9443/qm/oslc_qm/contexts/_0I6VT9HVEeGSWYp6WoHgWA/resources/com.ibm.rqm.execution.ExecutionResult/_hjYFQyRaEeK7qas16_dx7g">
  <oslc:instanceShape rdf:resource="https://myrqmserver:9443/qm/oslc_qm/contexts/_0I6VT9HVEeGSWYp6WoHgWA/shape/resource/com.ibm.rqm.execution.ExecutionResult"/>
  <oslc:serviceProvider rdf:resource="https://myrqmserver:9443/qm/oslc_qm/contexts/_0I6VT9HVEeGSWYp6WoHgWA/services.xml"/>
  <dcterms:title rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Lyo</dcterms:title>
  <oslc_qm:executesTestScript rdf:resource="https://myrqmserver:9443/qm/oslc_qm/contexts/_0I6VT9HVEeGSWYp6WoHgWA/resources/com.ibm.rqm.planning.VersionedExecutionScript/_n7DsYBoPEeKFULkQmjVzFg"/>
  <rqm_qm:verdict rdf:resource="http://jazz.net/ns/qm/rqm#com.ibm.rqm.execution.common.state.passed"/>
  <rdf:type rdf:resource="http://open-services.net/ns/qm#TestResult"/>
  <oslc_qm:producedByTestExecutionRecord rdf:resource="https://myrqmserver:9443/qm/oslc_qm/contexts/_0I6VT9HVEeGSWYp6WoHgWA/resources/com.ibm.rqm.execution.TestcaseExecutionRecord/_sLIr-CRLEeK7qas16_dx7g"/>
  <oslc_qm:reportsOnTestCase rdf:resource="https://myrqmserver:9443/qm/oslc_qm/contexts/_0I6VT9HVEeGSWYp6WoHgWA/resources/com.ibm.rqm.planning.VersionedTestCase/_tK7qkRoPEeKFULkQmjVzFg"/>
  <acp:accessControl rdf:resource="https://myrqmserver:9443/qm/oslc_qm/accessControl/_0I6VT9HVEeGSWYp6WoHgWA"/>
  <dcterms:created rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2012-11-01T19:29:59.188Z</dcterms:created>
  <dcterms:relation rdf:resource="https://myrqmserver:9443/qm/service/com.ibm.rqm.integration.service.IIntegrationService/resources/_0I6VT9HVEeGSWYp6WoHgWA/executionresult/urn:com.ibm.rqm:executionresult:481"/>
  <dcterms:modified rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2012-11-01T19:29:59.266Z</dcterms:modified>
  <dcterms:identifier rdf:datatype="http://www.w3.org/2001/XMLSchema#string">https://myrqmserver:9443/qm/oslc_qm/contexts/_0I6VT9HVEeGSWYp6WoHgWA/resources/com.ibm.rqm.execution.ExecutionResult/_hjYFQyRaEeK7qas16_dx7g</dcterms:identifier>
  <oslc_qm:status rdf:datatype="http://www.w3.org/2001/XMLSchema#string">com.ibm.rqm.execution.common.state.passed</oslc_qm:status>
 </rdf:Description>
</rdf:RDF>

It iis discovery based process, you always starts with rootservices URL and then discover the URLs
e.g.
1. https://myrqm:9443/qm/rootservices
Look for oslc_qm:qmServiceProviders in it to get qm catalog URL
2. Open qm catalog URL e.g. https://myrqm:9443/qm/oslc_qm/catalog
Use header
accept : application/rdf+xml
OSLC-Core-Version: 2.0
3. Response contains a list of service providers, essentially each service provider is a project area. Pick any one, there will be a URL which ends with service.xml
e.g. https://myrqm:9443/qm/oslc_qm/contexts/_0I6VT9HVEeGSWYp6WoHgWA/services.xml
4. Open service URL
You will get URL for all resources, Creation URL, resource shape URL, resource query URL etc..
e.g.

<oslc:queryCapability>
                    <oslc:QueryCapability>
                        <dcterms:title>Default query capability for TestResult</dcterms:title>
                        <oslc:queryBase rdf:resource="https://myrqm:9443/qm/oslc_qm/contexts/_0I6VT9HVEeGSWYp6WoHgWA/resources/com.ibm.rqm.execution.ExecutionResult"/>
                        <oslc:resourceShape rdf:resource="https://myrqm:9443/qm/oslc_qm/contexts/_0I6VT9HVEeGSWYp6WoHgWA/shape/query/com.ibm.rqm.execution.ExecutionResult"/>
                        <oslc:resourceType rdf:resource="http://open-services.net/ns/qm#TestResultQuery"/>
                    </oslc:QueryCapability>
                </oslc:queryCapability>
                <oslc:queryCapability>

I have similar kind of problem.
I have added the header :
accept : application/rdf+xml
OSLC-Core-Version: 2.0

but still its reading it in text/html.

Can anyone help me.