Re: [xml] XML Schema 'any' element support

[Kasimier Buchcik <kbuchcik 4commerce de>]

On Tue, 2005-06-07 at 19:19 +0200, Martijn Faassen wrote:
> Hi there,
>
> I'm getting some validation errors with an XML schema containing the 
> following:
>
>        <any namespace="##other" processContents="strict"/>
>
> The errors are along these lines:
>
> test.xml:25: element rfc1807: Schemas validity error : Element 'rfc1807' 
> [strict wildcard]: No matching global declaration available.
> test.xml:40: element dc: Schemas validity error : Element 'oai_dc:dc' 
> [strict wildcard]: No matching global declaration available.
>
> Verifying this against another validator (Xerces C, Xerces Java), the 
> example does validate against the schema. This was to be expected, as 
> the example I used is from the OAI-PMH spec (ListRecords, first example) 
> and I'm using the XML Schema for OAI-PMH, see, www.openarchives.org, in 
> particular:
>
> http://www.openarchives.org/OAI/openarchivesprotocol.html
>
> http://www.openarchives.org/OAI/openarchivesprotocol.html#ListRecords
>
> http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd
>
> libxml2 schemas seems to fail against it though.
>
> Is this a known limitation? The closest error I found in bugzilla 
> appears to be this one:
>
> http://bugzilla.gnome.org/show_bug.cgi?id=172215

Yes, this is the known bug.

> I tried various varieties for any, such as:
>
>        <any namespace="##other" />
>
> but this seemed to have no effect on the error.

It has no effect, since the default value for processContents
is "strict"; so it's the same as in your first example.

<any> with a namespace specifier of ##other does really not work
yet :-( It renders many schemata useless, since it lets through
_all_ elements, whatever namespace they are in; if maxOccurs is
e.g. 5, it will let through the next 5 elements and apply the
processContents constraints on them. I'll try to commit a new
version of xmlschemas.c today, which is able to workaround such
a case if minOccurs and maxOccurs are both 1.

Regards,

Kasimier