SOAP, UDDI, Web Services, and the Semantic Web Justin R. Erenkrantz ICS 221 December 3rd, 2002

SOAP, UDDI, Web Services, andthe Semantic Web

Justin R. Erenkrantz

ICS 221

December 3rd, 2002

Web Services

• Identified by URI, HTTP, and XML

• Making websites more than content

• Enabling extensible interactions

• Ideally public, perhaps private– Commercial web services

SOAP

• W3C’s Simple Object Access Protocol

• XML-centric middleware data format

• Origins from simpler XML-RPC

• Nodes, roles, faults

• Typically bound to HTTP– Interesting architectural mismatches

UDDI

• Universal Description Discovery and Integration

• Acts as a naming service for Web Services

• Built on top of SOAP

• Distributed repositories

• Publish/subscribe support– SOAP callbacks

Semantic Web

• “Crown Jewel”

• Meaningful interpretation of web content

• Not just interactions, but understanding

• Each semantic web site agrees on meaning

• Effects of non-participation