Is there an XML Schema 1.0 datatype for [the names of] all XML Schema 1.0 datatypes?

Question

By XML Schema datatype, I mean any datatype that would be found in the schema for schemas.

Does anyone know of such a type? [That is, a type which accepts the names of the XSD 1.0 datatypes, and nothing else.]

Edit: Example:

XML:

<table name="my_name">
    <column name="col1" type="BOOLEAN">
    <column name="col2" type="INT"/>
</table>

So the goal is the validate the type attribute for element column. The type attribute would ideally validate only valid XML datatypes, such as int, boolean, or string.

Answer 1

I think you haven't expressed yourself clearly: I suspect that what you want is a type whose value space is the set of names of built-in simple types.

The names of built-in simple types are all QNames, so your type should be a restriction of xs:QName, restricted with an enumeration to constrain it to the built-in types:

<xs:simpleType name="builtInTypeName">
  <xs:restriction base="xs:QName">
    <xs:enumeration value="xs:decimal"/>
    <xs:enumeration value="xs:boolean"/>
    etc
  </xs:restriction>
</xs:simpleType>

At least, I think that's what you want - but I'm guessing. The fact that you haven't used the XSD type names like xs:boolean and xs:integer, but your own type names BOOLEAN and INT, makes me suspect I haven't quite grasped what you are after.

Answer 2

You may be looking for xs:anyType, or maybe xs:anySimpleType.