Subject: [KEYPROV] Web Service Description Language

From: "Hallam-Baker, Phillip" <[email-masked]>
Date: Tue, 10 Jul 2007 09:14:31 -0700

<hat mode="personal">
 
I spent this morning looking into some changes that have been made to WSDL since the original scheme. I think they might have a significant effect on how we might want to approach the specification of HTTP and SOAP bindings.
 
In the past the general approach has been to regard the WSDL document as an afterthought, something that is thrown together at the last minute and at best put in an appendix to the main spec, or circulated as a Samizdat file.
 
WSDL 2.0 has an adjunct that specifies an HTTP binding.
http://www.w3.org/TR/wsdl20-adjuncts/#http-binding
 
This creates a rather interesting option: use WSDL in conjunction with XML schema to structure the presentation of the protocol document.
 
The basic mechanics of using WSDL are that you define a series of messages, group the messages together as 'ports' which in our case correspond to request/response pairs and finaly apply a binding which may be SOAP or HTTP.
 
We already have much of the structure required in the DSKPP draft.
 
</hat>
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