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different whitespace-collapse behaviour of parsers

From: Dieter Guthmann <mailing-deg@bup-nbg.de>
Date: Thu, 12 Mar 2009 17:35:04 +0100
Message-ID: <49B939B8.1080906@bup-nbg.de>
To: xmlschema-dev@w3.org
Hi,

I've tested a few XML-Parsers/Validators and discovered that the
restriction "whiteSpace=collapse" [1] is interpreted in two different ways.

"Liquid XML Studio 2009" treats a whitespace-only string within a tag
not as trailing/leading whitespace [1]:
"<tag>    \n   </tag>" will be transformed in "<tag> </tag>" before
validation (or it seems so),
whereas the other parsers I've tested (Altova XML Spy, XMLmind XML
Editor, W3C XSV) will transform
"<tag>    \n   </tag>" to "<tag></tag>"

Which behaviour is the correct one? See below for a schema example.

Best Regards,
Dieter Guthmann

[1] <http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/#rf-whiteSpace>

Below an Example:
------- begin mysschema.xsd -------
<?xml version="1.0" encoding="utf-8" ?>
<xs:schema elementFormDefault="qualified"
xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:simpleType name="nocontent">
    <xs:restriction base="xs:string">
      <xs:whiteSpace value="collapse" />
      <xs:pattern value="" />
      <!-- This line above will not work in  Liquid XML... replace
"value" with "[ ]" and it will work -->
    </xs:restriction>
  </xs:simpleType>
  <xs:element name="customerdatabase">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="customer" />
      </xs:sequence>
    </xs:complexType>
  </xs:element>
  <xs:element name="customer">
    <xs:complexType>
      <xs:simpleContent>
        <xs:extension base="nocontent">
          <xs:attribute name="name" type="xs:string" />
        </xs:extension>
      </xs:simpleContent>
    </xs:complexType>
  </xs:element>
</xs:schema>
------- end myschema.xsd -------

------- begin myxmlfile.xml -------
<?xml version="1.0" encoding="UTF-8"?>
<customerdatabase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="myschema.xsd">
  <customer name="test">
  </customer>
</customerdatabase>
------- end myxmlfile.xml -------
Received on Friday, 13 March 2009 01:00:41 GMT

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