Oslc - get all project area names and url

Hi All,

i have read the "Open Services for Lifecycle Collaboration Workshop" and used the examples for my own project, but now I have one more question. Beside to get all Names of the project areas, i need in addition the url from the project area (e.g. via REST Client: https://localhost:9443/ccm/process/project-areas/_ZOfGcD3yEea3-J04vnQkIQ)

My actual Steps are:
....
1) Request the Root Services document
...
2) Define the XPath evaluation environment

            XPathFactory factory = XPathFactory.newInstance();
            XPath xpath = factory.newXPath();
            xpath.setNamespaceContext(
                    new NamespaceContextMap(new String[]
                            {    "rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#",
                                "oslc_cm","http://open-services.net/xmlns/cm/1.0/"}));

            String catalogXPath = "/rdf:Description/oslc_cm:cmServiceProviders/@rdf:resource";
            String serviceProviderTitleXPath = "//oslc:ServiceProvider/dcterms:title";

3) Parse the response body to retrieve the catalog URI
....
4) Setup the catalog request
...
5) Access to the Service Providers catalog
...
6) Define the XPath evaluation environment
...

7) Parse the response body to retrieve the Service Provider

source = new InputSource(catalogResponse.getEntity().getContent());
NodeList titleNodes = (NodeList) (xpath2.evaluate(serviceProviderTitleXPath, source, XPathConstants.NODESET));
              
     // Print out the title of each Service Provider
                int length = titleNodes.getLength();
                System.out.println(">> Project Areas:");
                for (int i = 0; i < length; i++) {
                    System.out.println(">> \t - "+ titleNodes.item(i).getTextContent());
                    projectAreaNamesList.add(titleNodes.item(i).getTextContent());
                }

How can i get in addition to the names the URLs from the project area (from the "catalogResponse")? Is that possible to add them? i think i have to define it somewhere in Step 2, "String serviceProviderTitleXPath = "//oslc:ServiceProvider/dcterms:title";  "  ??

Best Regards!