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New issue: XML1.1 and WSDL 2.0 schemas

From: Jean-Jacques Moreau <jean-jacques.moreau@crf.canon.fr>
Date: Thu, 06 May 2004 12:28:06 +0200
Message-ID: <409A1336.7040909@crf.canon.fr>
To: www-ws-desc@w3.org
Cc: Yves Lafon <ylafon@w3.org>, Herve Ruellan <herve.ruellan@crf.canon.fr>

We seem to be having the same issue with XML 1.1 that the XMLP WG is 
just facing.

Our WSDL schemas are normative (see quoted text below). However, XML 
Schema is not compatible with XML 1.1 (and may not be for some time to 
come). This means that a WSDL 2.0 document cannot be authored using XML 
1.1, otherwise it would be schema invalid.

There may also be subtle interactions with the <type/> section. Could a 
WSDL 2.0 XML 1.1 document contain (or reference, for that matter), a XML 
Schema 1.0 type description? I have not looked into that issue deeply.

Regarding (at least) the former issue, we seem to be having two options:

1) Don't do anything and accept that WSDL 2.0 documents will never be 
written using XML 1.1 (this may be ok).

2) Make the schemas non-normative and tighten up the spec as 
appropriate, to ensure we provide a similar level of correctness (the 
current infoset description may be ok already).

I don't have any strong preference either way. I just thought the WG 
should be warned before being faced with the difficult position XMLP is 
in now, since SOAP 1.2 is already a Recommendation and can hardly be 



<part1 where="section 1.2">
A normative XML Schema [XML Schema: Structures 
<cid:part1.03040200.01040909@crf.canon.fr>], [XML Schema: Datatypes 
<cid:part2.00050100.02080706@crf.canon.fr>] document for the 
"http://www.w3.org/@@@@/@@/wsdl" namespace can be found at 
http://www.w3.org/@@@@/@@/wsdl. WSDL documents that do NOT conform to 
this schema are not valid WSDL documents. WSDL documents that DO conform 
to this schema and also conform to the other constraints defined in this 
specification are valid WSDL documents.

Yves Lafon wrote:

>  The publication of XML 1.1 in February 2004 started a discussion in
>  the XMLP WG about the meaning of SOAP 1.2 being infoset-based, as
>  well as compatibility on the wire depending on the level of XML used.
>  It has been decided that the current SOAP 1.2 HTTP binding will be
>  restricted to XML 1.0 to ensure maximum compatibility with existing
>  implementation (ie: the one made prior the introduction of XML 1.1),
>  while the core of SOAP 1.2 will continue to allow the whole character
>  range of the Infoset, and let the binding decide what can be
>  serialized or not.
>  As this issue might also have an impact on the WSDL drafts, the XMLP
>  WG decided to notify this group about this issue and the way we
>  resolved this. The list of changes from XML1.0 to XML1.1 can be found
>  at [1] The infoset definition of allowable characters can be found at
>  [2]
>  [1] http://www.w3.org/TR/2004/REC-xml11-20040204/#sec-xml11
 > [2] 
>  Regards,
Received on Thursday, 6 May 2004 06:44:01 UTC

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