Maintaining namespace for attribute type

[Garagan, Sean]

Hi Martin,

Thanks, that was something I missed (a lot of docs to sift through when learning XQuery!)  Unfortunately, my implementation (in BEA ALSB 2.6) does not support that declaration.  However, the in-scope-prefixes() function does work so I will try to use that to add the namespaces and hope that they do not get re-removed.

Sean

SAS Platform Team
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-----Original Message-----
From: Martin Probst [mailto:http://x-query.com/mailman/listinfo/talk] 
Sent: March 10, 2010 9:25 AM
To: Garagan, Sean
Cc: http://x-query.com/mailman/listinfo/talk
Subject: Re:  Maintaining namespace for attribute type

Hi,

did you find the copy-namespaces declaration?

See here:
http://www.w3.org/TR/xquery/#id-copy-namespaces-decl
http://www.w3.org/TR/xquery/#id-element-constructor

So I think if you declare copy-namespaces preserve, inherit; your
namespace bindings should survive. If your implementation doesn't
support that, you might achieve a similar effect with the function
in-scope-prefixes.

Regards
Martin

On Wed, Mar 10, 2010 at 14:07, Garagan, Sean <http://x-query.com/mailman/listinfo/talk> wrote:
> Good day,
>
>
>
> I have been looking at this for a few days now and I cannot seem to figure
> out a proper way via XQuery to maintain the namespace used in an xsi:type
> when the namespace is not used with an element or an attribute.  For
> example:
>
>
>
> <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
>
>             <soap:Header
> xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> </soap:Header>
>
>             <soapenv:Body>
>
>                         <abc:a
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>
> xmlns:abc="http://demo/xml/abc"
>
> xmlns:xyz="http://demo/xml/xyz">
>
>                                     <!--Zero or more repetitions:-->
>
>                                     <abc:b>
>
>                                                 <!--Zero or more
> repetitions:-->
>
>                                                 <abc:c
> xsi:type="xyz:EType">simpleType</abc:c>
>
>                                     </abc:b>
>
>                         </abc:a>
>
>             </soapenv:Body>
>
> </soapenv:Envelope>
>
>
>
> In this case, the inner <abc:c> has a type in the schema of anyType and in
> this case has been typed as "xyz:EType".  When this goes through an XQuery
> transformation, the namespace declaration in the root of the message is lost
> in the output.  The transformations tend to be generic as these messages can
> be many different types; this is for a message router in an ESB.  My read of
> the spec shows that the XQuery engine can remove namespaces not used in
> elements or attributes and is allowed to ignore content.  To me, the value
> of xsi:type is not content but critical information (although yes, strictly
> it is content).  This gap in the spec suggests that XQuery cannot handle
> dynamic typing and allow messages of anyType to be handled.
>
>
>
> Some additional information, these messages and schemas are externally
> defined and cannot be changed so we need to handle these as-is.  My question
> is, is there a way to maintain the namespace or even retrieve the namespace
> and insert it later via XQuery or do I need to update this elsewhere (such
> as via Java code to re-insert the missing declaration)?
>
>
>
> Thanks in advance,
>
> Sean
>
>
>
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