UDDI

UDDI (Universal Description, Discovery, and Integration) is an XML-based registry for Web services on the Internet. A UDDI registry service is a Web service that manages information about service providers, service implementations, and service metadata. Service providers can use UDDI to advertise the services they offer. Service consumers can use UDDI to find out services that suit their requirements and to obtain the service metadata needed to consume those services.

UDDI uses World Wide Web Consortium (W3C) and Internet Engineering Task Force (IETF) Internet standards such as XML, HTTP, and DNS protocols. It also uses WSDL to describe interfaces to web services.

 A UDDI business registration consists of three components:

• White Pages — For address, contact, and known identifiers;
• Yellow Pages — For industrial categorizations based on standard taxonomies;
• Green Pages — For technical information about services exposed by the business.

UDDI is a cross-industry endeavor driven by all major platform and software providers like Dell, Fujitsu, HP, Hitachi, IBM, Intel, Microsoft, Oracle, SAP, and Sun, as well as a large community of marketplace operators, and e-business leaders.