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I was wondering if it is possible to define an restricted attribute
such that the following forms are both valid:

<myElement value="hi"/> <!-- value should be "hi" or "lo" -->
<myElement value="100"/><!-- value should be between 50-150 -->

voorth wrote:
> I was wondering if it is possible to define an restricted attribute
> such that the following forms are both valid:
>
> <myElement value="hi"/> <!-- value should be "hi" or "lo" -->
> <myElement value="100"/><!-- value should be between 50-150 -->

You can define a union type of two simple types:

<xs:attribute name="value">
<xs:simpleType>
<xs:union>
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="hi"/>
<xs:enumeration value="lo"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType>
<xs:restriction base="xs:int">
<xs:minInclusive value="50"/>
<xs:maxInclusive value="100"/>
</xs:restriction>
</xs:simpleType>
</xs:union>
</xs:simpleType>
</xs:attribute>

See section "2.5.1.3 Union datatypes" in
<URL:http://www.w3.org/TR/xmlschema-2/#datatype-dichotomies>
--

Martin Honnen
http://JavaScript.FAQTs.com/

On 12 Feb, 11:33, voorth <voo...@xs4all.nl> wrote:
> I was wondering if it is possible to define an restricted attribute
> such that the following forms are both valid:
>
> <myElement value="hi"/> <!-- value should be "hi" or "lo" -->
> <myElement value="100"/><!-- value should be between 50-150 -->

You can use XML schema xs:union construct to do this. Something along
the lines of:

<xs:attribute name="value">
<xs:simpleType>
<xs:union>
<xs:simpleType>
<xs:restriction base="xs:int">
<xs:minInclusive value="50"/>
<xs:maxInclusive value="150"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="hi"/>
</xs:restriction>
</xs:simpleType>
</xs:union>
</xs:simpleType>
</xs:attribute>

Although you probably don't want the string part as restricted as
this!

HTH,

Pete Cordell
Codalogic
Visit http://www.codalogic.com/lmx/ for XML C++ data binding

On 12 Feb, 12:41, use...@tech-know-ware.com wrote:
> On 12 Feb, 11:33, voorth <voo...@xs4all.nl> wrote:
>
> > I was wondering if it is possible to define an restricted attribute
> > such that the following forms are both valid:
>
> ...
>
> Although you probably don't want the string part as restricted as
> this!

Ooops, missed the 'lo' part. See Martin's answer for that. He must
type faster than me!

HTH,

Pete Cordell
Codalogic
Visit http://www.codalogic.com/lmx/ for XML C++ data binding

Thanks, guys, that was just what I was looking for.