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You might accept making only the metadata and identifier elements have its
own namespace. Then you could put any of your main namespace's elements into
the "bag".
-tor
-----Original Message-----
From: Hess Yvan [mailto:yvan.hess@imtf.ch]
Sent: Friday, March 12, 2004 10:29 AM
To: 'Chiusano Joseph'
Cc: 'xml-dev@lists.xml.org'
Subject: RE: [xml-dev] Problem designing complexType accepting a specified
element and allowing any others.
Thanks for your answer. The XML document for which I have to write the
schema have all the elements under the section metadata as illustrated in my
sample and should accept any others element from the same namespace or from
a other name space. I can not change this requierement.
In general manner, I would like to define a kind of bag element ("metadata")
where the order of the elements is not important, that contains predefined
elements that must occurs with a given occurrences (min and max) and that
also accepts any king of others elements (same or others namespaces). I
don't know if a reach a limitation of the W3C recommendation, but from my
point of view this use case is a real concrete use case that should be
supported by W3C XML schema recommendation.
More idea how to implement it?
Yvan
-----Original Message-----
From: Chiusano Joseph [mailto:chiusano_joseph@bah.com]
Sent: jeudi, 11. mars 2004 22:20
To: Hess Yvan
Cc: 'xml-dev@lists.xml.org'
Subject: Re: [xml-dev] Problem designing complexType accepting a specified
element and allowing any others.
You are running into an issue called "non-determinism", because the schema
processor cannot discern - when a "choice" compositor is used - if an
element named "identifier" should be considered to be the "identifier"
element that is declared in the content model, or an element that is
supplied as a wildcard (the xs:any element).
You have not provided a "namespace" attribute to the xs:any element -
therefore, an element in that place in an XML instance document conforming
to the schema to which that content model belongs (long sentence, I know but
trying to be precise) can be in any namespace.
If you were to add a "namespace" attribute to the xs:any element that is
more "strict" with the namespace - e.g. "##other", which means that the
element must be from a namespace other than the target namespace of the
schema - then this will solve the problem because the schema processor will
be able to handle such an element in a deterministic manner.
Hope that helps.
Kind Regards,
Joe Chiusano
Booz | Allen | Hamilton
Strategy and Technology Consultants to the World
Hess Yvan wrote:
>
> I want to design a complexType named "metadata" that forces the
> presence
of
> an "identifier" element and allows any others elements not predefined.
> Moreover the "identifier" and the others elements can appear in any
> order into the "metadata" element. Here are examples of valid xml
instances:
>
> <metadata xmlns="http://www.imtf.com/test";>
> <identifier>urn:hsc:1234</identifier>
> <name>Hess Yvan</name>
> </metadata>
>
> <metadata xmlns="http://www.imtf.com/test";>
> <subject>This is the subject</subject>
> <identifier>urn:hsc:1234</identifier>
> <title>This is the title</title>
> </metadata>
>
> I implemented the following xml schema complexType but it doesn't work:
>
> <xs:element name="metadata">
> <xs:complexType>
> <xs:choice minOccurs="0" maxOccurs="unbounded">
> <xs:element name="identifier" type="xs:string"/>
> <xs:any processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
> </xs:choice>
> </xs:complexType>
> </xs:element>
>
> I get the following error with Xerces validation and a similar one
> with
XSV
> (it seems I violate the "Unique Particle Attribution").
>
> [Error] choice.xsd:4:23: cos-nonambig:
"http://www.imtf.com/test":identifier
> and
> WC[##any] (or elements from their substitution group) violate "Unique
> Particle Attribution". During validation against this schema,
> ambiguity would be created for those two particles.
> choice.xml: 571 ms (3 elems, 1 attrs, 0 spaces, 30 chars)
>
> If I change my xml schema using sequence instead of choice as follow:
>
> <xs:element name="metadata">
> <xs:complexType>
> <xs:sequence>
> <xs:element name="identifier" type="xs:string"/>
> <xs:any processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
> </xs:sequence>
> </xs:complexType>
> </xs:element>
>
> it works but in this case the "identifier" element must be at the
> FIRST position and I don't want that !!!
>
> Please can you help me to solve this problem. I have no idea how to
> solve
it
> !!!
>
> Regards. Yvan Hess
>
> --------------------------------------------------------
> XML file:
>
> <?xml version="1.0" encoding="UTF-8"?> <metadata
> xmlns="http://www.imtf.com/test";
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xsi:schemaLocation="http://www.imtf.com/test choice.xsd">
> <identifier>urn:hsc:1234</identifier>
> <name>Hess Yvan</name>
> </metadata>
>
> --------------------------------------------------------
> XML schema file:
>
> <?xml version="1.0" encoding="UTF-8"?> <xs:schema
> targetNamespace="http://www.imtf.com/test";
> xmlns="http://www.imtf.com/test";
xmlns:xs="http://www.w3.org/2001/XMLSchema";
> elementFormDefault="qualified" attributeFormDefault="unqualified">
> <xs:element name="metadata">
> <xs:complexType>
> <xs:choice minOccurs="0" maxOccurs="unbounded">
> <xs:element name="identifier" type="xs:string"/>
> <xs:any processContents="lax" minOccurs="0"
> maxOccurs="unbounded"/>
> </xs:choice>
> </xs:complexType>
> </xs:element>
> </xs:schema>
>
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