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Is enumeration valid for NMTOKENS?

From: Siva Dirisala <siva@dirisala.net>
Date: Sun, 30 Mar 2008 02:03:40 -0700
Message-ID: <8125054d0803300203n16229f14h4178eca78d2e83c6@mail.gmail.com>
To: xmlschema-dev@w3.org
I came across a schema definition where the attribute type is defined as

<xs:simpleType name="someType">
   <xs:restriction base="xs:NMTOKENS">
      <!-- bunch of xs:enumeration elements -->

I am not sure if the intent is that someType should be a list of values
where each value can be one of the enumerated values. Or it could be a
mistake and the base type should have been xs:NMTOKEN. I looked at the XML
Schema specification, but couldn't find any restriction in using a list type
as the base type for enumeration.

If the intent is to allow multiple values, then personally I would prefer
defining a type for the list elements and then another type that explicitly
uses the list and itemType to define a list of that restricted type. I would
like to know if the above definition is correct or it should be the way I

Received on Sunday, 30 March 2008 09:05:40 UTC

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