Question of wsrf example-2

Hi,

I modified the WsrfTestClient.java as following:
public static void main(String[] args)
{
...
            ServiceGroupClient sg = new ServiceGroupClient(epr);
           
            sg.setTrace(true);
            //
            // ping SG, wait a few seconds, then check for members
            // that were added by the simulation factory
            //
            System.out.println("Pinging Muse to initialize the endpoint...");
           // sg.getResourcePropertyDocument();
            System.out.println("Waiting 10 seconds while simulation creates WS-resources...");
            Thread.currentThread().sleep(10000);
            System.out.println("Done waiting - reading service group entries...");
            //cyl
            sg.getResourcePropertyDocument();

...
}

I get SOAP response as following:

<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope">
    <soap:Header>
        <wsa:To xmlns:wsa="http://www.w3.org/2005/08/addressing">http://www.w3.org/2005/08/addressing/role/anonymous</wsa:To>
        <wsa:Action xmlns:wsa="http://www.w3.org/2005/08/addressing">http://docs.oasis-open.org/wsrf/rpw-2/GetResourcePropertyDocument/GetResourcePropertyDocumentResponse</wsa:Action>
        <wsa:MessageID xmlns:wsa="http://www.w3.org/2005/08/addressing">uuid:19e241b2-ff2f-3c6e-3dce-09300caee841</wsa:MessageID>
        <wsa:RelatesTo RelationshipType="wsa:Reply" xmlns:wsa="http://www.w3.org/2005/08/addressing">uuid:87802452-409c-4d08-47ef-4616534d4972</wsa:RelatesTo>
        <wsa:From xmlns:wsa="http://www.w3.org/2005/08/addressing">
            <wsa:Address>http://127.0.0.1:8086/wsrf/services/ServiceGroup</wsa:Address>
        </wsa:From>
    </soap:Header>
    <soap:Body>
        <wsrf-rp:GetResourcePropertyDocumentResponse xmlns:wsrf-rp="http://docs.oasis-open.org/wsrf/rp-2">
            <wsrf-sg:ServiceGroupRP xmlns:wsrf-sg="http://docs.oasis-open.org/wsrf/sg-2">
                <wsrf-rp:QueryExpressionDialect>http://www.w3.org/TR/1999/REC-xpath-19991116</wsrf-rp:QueryExpressionDialect>
                <wsrf-sg:Entry>
                    <wsrf-sg:ServiceGroupEntryEPR>
                        <wsa:Address xmlns:wsa="http://www.w3.org/2005/08/addressing">http://127.0.0.1:8086/wsrf/services/ServiceGroupEntry</wsa:Address>
                        <wsa:ReferenceParameters xmlns:wsa="http://www.w3.org/2005/08/addressing">
                            <muse-wsa:ResourceId xmlns:muse-wsa="http://ws.apache.org/muse/addressing">uuid:1df59833-3259-7a6c-3c3c-37a25e875e86</muse-wsa:ResourceId>
                        </wsa:ReferenceParameters>
                    </wsrf-sg:ServiceGroupEntryEPR>
                    <wsrf-sg:MemberServiceEPR>
                        <wsa:Address xmlns:wsa="http://www.w3.org/2005/08/addressing">http://127.0.0.1:8086/wsrf/services/WsResource</wsa:Address>
                        <wsa:ReferenceParameters xmlns:wsa="http://www.w3.org/2005/08/addressing">
                            <muse-wsa:ResourceId xmlns:muse-wsa="http://ws.apache.org/muse/addressing">uuid:bc2c6c6a-6557-a152-a6bd-b1fc164e31c2</muse-wsa:ResourceId>
                        </wsa:ReferenceParameters>
                    </wsrf-sg:MemberServiceEPR>
                    <wsrf-sg:Content>
                        <myns:MyProperty xmlns:myns="http://ws.apache.org/muse/test/wsrf">This is the FIRST initial value</myns:MyProperty>
                        <myns:MyProperty xmlns:myns="http://ws.apache.org/muse/test/wsrf">This is the SECOND initial value</myns:MyProperty>
                    </wsrf-sg:Content>
                </wsrf-sg:Entry>
                <wsrf-sg:MembershipContentRule
                    ContentElements="myns:MyProperty" xmlns:myns="http://ws.apache.org/muse/test/wsrf"/>
            </wsrf-sg:ServiceGroupRP>
        </wsrf-rp:GetResourcePropertyDocumentResponse>
    </soap:Body>
</soap:Envelope>

My question is MyFactoryImpl.java only creates "WsResource" in the run body, how is ServiceGroupEntry created and what does it stand for?

Thanks.

Sara