Web Services: Difference between revisions
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==Web Service Protocols== | ==Web Service Protocols== | ||
[[Image:WS-Stack.jpg|thumb| | [[Image:WS-Stack.jpg|thumb|262px|The Web Services Protocol Stack]] | ||
The '' | The ''vanilla'' XML SOAP+WSDL over HTTP web services implementation can be thought of as the core of an entire stack of protocols relating to web services. | ||
Early visions for web services called for dynamic discovery of, and connection to, web services, details of which were to be located in a [http://en.wikipedia.org/wiki/UDDI UDDI] (Universal Description, Discovery and Integration - see also [http://www.oasis-open.org/committees/tc_home.php?wg_abbrev=uddi-spec]) repository. More recently (as of Nov 2007) however, UDDI has faded from view as it has become increasingly clear that it was somewhat ahead of its time. As the web services environment matures it may re-emerge, or some other discovery mechanism might be implemented to take its place. Currently most web service connections are statically bound, not dynamically discovered. | |||
There are also a whole raft of additional protocols (not all of which are strictly in the same class as formal protocols like SOAP and WSDL), usually beginning "'''WS-'''". Examples are [http://developers.sun.com/sw/platform/technologies/ws-reliability.v1.0.pdf WS-Reliability], [http://download.boulder.ibm.com/ibmdl/pub/software/dw/specs/ws-rm/ws-reliablemessaging200502.pdf WS-ReliableMessaging] (these two are competing standards: the latter, backed by Microsoft and IBM, looks the likely winner), [http://www.ibm.com/developerworks/library/specification/ws-secure/ WS-Security], [http://download.boulder.ibm.com/ibmdl/pub/software/dw/specs/ws-polfram/ws-policy-2006-03-01.pdf WS-Policy], and so on. | |||
Don't worry if you have missed the latest emerging web service standard - there will be another one along in a minute! | |||
==VDF Implementation== | ==VDF Implementation== | ||
