SOAP, UDDI, Web Services, and the Semantic Web - Justin Erenkrantz

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SOAP, UDDI, Web Services, and

the 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