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Lists of NMTOKEN

From: Graham Mann <gmann@adobe.com>
Date: Fri, 11 Jul 2003 14:20:02 +0100
Message-Id: <>
To: xmlschema-dev@w3.org

Given the following schema

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified">
        <xs:element name="TESTING">
                        <xs:attribute name="Name" type="Name" use="required"/>
                        <xs:attribute name="NameList_A" type="NameList" use="required"/>
                        <xs:attribute name="NameList_B" type="NameList" use="required"/>
        <xs:simpleType name="Name">
                <xs:restriction base="xs:NMTOKEN">
                        <xs:enumeration value="Peter"/>
                        <xs:enumeration value="Paul"/>
                        <xs:enumeration value="Mark"/>
                        <xs:enumeration value="John"/>
        <xs:simpleType name="NameList">
                <xs:list itemType="Name"/>

And the following document

<TESTING        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
                xsi:noNamespaceSchemaLocation="D:\JDF\CIP4\jdf\schema\Version_1_2\ListTest.xsd" #
                NameList_A="Mark John"/>

Is NameList_A valid?
I say Yes
Xerces C++ say's Yes
Altova (XML Spy) support say's 
This has been reported to us before but here is our finding on this:

The customer is incorrect in its assessment of the situation. While it
is correct that the datatype NMTOKENS allows for a white-space separated
list of individual NMTOKEN entries, there is nothing in the XML Schema
specification that would support the claim, that the allowed range of
individual values can be specified in an enumeration facet.

The enumeration facet is clearly defined under
http://www.xmlspy.com/specs_schema2.html#rf-enumeration and the
validation rule for this facet is specified as:

    Validation Rule: enumeration valid 

    A value in a *value space* is facet-valid with respect
    to *enumeration* if the value is one of the values specified in

There is no special provision for NMTOKENS in the validation rule for
the enumeration facet, and thus XML Spy correctly flags this as an
error, because the value "A B" does not match any of the enumeration
values in the schema.

Graham Mann
Adobe Systems Europe Ltd.
Received on Friday, 11 July 2003 09:20:56 UTC

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