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Is enumeration valid for NMTOKENS?

From: "Siva Dirisala" <siva@--------.--->
To: xmlschema-dev@--.---
Date: 3/29/2008 6:04:00 PM
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 -->
   </xs:restriction>
</xs:simpleType>

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
prefer.

thanks,
Siva


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