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UDDI registration center provides a set of management mechanism for Web services providers to publish their Web service and for Web service consumers to inquire what they needs. It solves the problem of Web service description, discovery and Integration. Web services graph is the semantic index established on the UDDI registration center according to the logical relations between web services [1,2]. It can enhance the Web service discovery efficiency. jUDDI is an open source Java implementation of UDDI specification for Web Services. Based on the research on UDDI and Web service graph, this article takes jUDDI as an example to show how the traditional UDDI registry center can be extended so as to supporting Web service graph.