Multiple attribute values

[Neil Archer <ne...@viewgate.com>]

Hi,

I am relatively new to XML and I am trying to validate documents using XML
schemas.

So far I have used the schema to limit the selections that can be
legitimately used for the values of the attribute, but I can't find a way of
being able to use one or more of values at any one time.

For example, the attribute holds the formats available for a music record,
it can be either on CD, tape or vinyl.  How do I change the schema to allow
the selection of both CD and tape for instance?

So far the schema looks like:

	<xsd:attribute  name="format">
		<xsd:simpleType base="xsd:string">
			<xsd:enumeration value="cd"/>
			<xsd:enumeration value="tape"/>
			<xsd:enumeration value="vinyl"/>
		</xsd:simpleType>
	</xsd:attribute>

I know I can enumerate all possible combinations but this seems a bit like
overkill.

Cheers,
Neil