XSD restrictions - both string and numerical

[voorth]

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 -->

 

[Martin Honnen]

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>

 

[usenet]

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

 

[usenet]

...

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

 

[voorth]

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