Thank you all for the patience. (I also used the waiting time to assure no huge change to the API and SPI)
A Reference Implementation is now available at http://issues.apache.org/jira/secure/attachment/12341070/registry4.zip for JIRA http://issues.apache.org/jira/browse/TUSCANY-677 The implementation has a JavaDoc at impl/SPI/doc and please try the live demo at impl/API/src/test/java/org/apache/tuscany/registry/test demonstrating using SPI to register Locator and loader and using API to get symbol on demand. A WSDL Reference Implementation will be provided next time. -- Yang ZHONG
