On WebLogic Server 8.1, opensso-client-jdk14.war configured for ID-WSF returned an error when looking for service.
Workaround. Add following JAR files under weblogic-home/jdk142_08/jre/lib/endorsed:
jax-qname.jar
namespace.jar
relaxngDatatype.jar
xalan.jar
To obtain these JAR files, contact your Sun representative.