Forrester narrows list of specs for Web services: "Most Web services developers will have to work out a balance between those two extremes, he said. The standards and specifications for conservatives and those for the more aggressive are identified in his Forrester report titled, 'Web Services Specifications: Core Web Services.'
For the conservative developer, the list is short:

SOAP 1.1
WSDL 1.1
SOAP Messages with Attachments
WS-I Basic Profile 1.0
WS-I Basic Profile 1.1
In the report he notes: 'Only SOAP 1.1 and WSDL 1.1 have near-universal support, so ask your vendors before using any other specifications.'
The list for the more aggressive, adds two more specs:

SOAP 1.2
WS-I Attachments Profile 1.0
With this list, Heffner issues the caveat that at the end of 2006 only about half the vendors supported SOAP 1.2 and support for WS-I Attachments Profile 1.0 was less than that."

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