[Q] How to declare xml:lang attribute in a schema?

[Andreas Junghans <an...@isb-ka.de>]

Hi there!

Does anyone know how I can declare the xml:lang attribute in a schema?
I've tried several ways and ended up with one I _think_ should be
accepted by Xerces:

-- test_xmlns.xsd
<?xml version="1.0" encoding="ISO-8859-1"?>
<schema
 xmlns="http://www.w3.org/1999/XMLSchema"
 xmlns:tst="test"
 targetNamespace="test"
 elementFormDefault="qualified"
>
    <complexType name="test" content="empty">
        <anyAttribute namespace="http://www.w3.org/XML/1998/namespace"/>
    </complexType>
    <element name="test" type="tst:test"/>
</schema>

-- test_xmlns.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<test
 xmlns="test"
 xmlns:xsi="http://www.w3.org/1999/XMLSchema-instance"
 xsi:schemaLocation="test test_xmlns.xsd"
 xml:lang="en"
/>

--

Xerces-J 1.1.3 produces the following exception:

org.xml.sax.SAXParseException: Attribute "ANY---xml:lang" must be
declared for e
lement type "test".

If I change the namespace for anyAttribute to something else I get this
exception (which is perfectly acceptable):

org.xml.sax.SAXParseException: Attribute "xml:lang" must be declared for
element
 type "test".

The different exceptions show that Xerces seems to recognize the XML
namespace, but still doesn't accept the lang attribute. I've taken a
look at the schema for schemas to see how they declare xml:lang for
documentation elements. What I've found looks most strange to me (and
doesn't work with Xerces):

<element name="documentation"
xmlns:x="http://www.w3.org/XML/1998/namespace">
    <complexType content="mixed">
        <any minOccurs="0" maxOccurs="unbounded" processContents="lax"/>
        <attribute name="source" type="uriReference"/>
        <attributeGroup ref="x:specialAttrs"/>
    </complexType>
</element>

Any ideas? Maybe I'm doing something wrong?

TIA

  Andreas


PS It doesn't change anything if I put the complex type definition
inside the element definition. It also doesn't work to use ##any for the
namespace of anyAttribute.

-- 
Andreas Junghans
- Anwendungsentwickler -

ISB GmbH           Tel: +49 (0)721/82800-0
Karlstraße 52-54   Fax: +49 (0)721/82800-82
76133 Karlsruhe    mailto:andreas.junghans@isb-ka.de
Germany            http://www.isb-ka.de