[SOLVED] XML Schema Case Insensitive Enumeration of Simple Type String

XML Schema Case Insensitive Enumeration of Simple Type String

I am in need of a case insensitive string enumeration type in my XML schema (.xsd) file. I can get case insensitive by doing the following.

<xs:simpleType name="setDigitalPointType">
    <xs:restriction base="xs:string">
        <xs:pattern value="[Oo][Nn]" />
        <xs:pattern value="[Oo][Ff][Ff]" />
    </xs:restriction>
</xs:simpleType>

The only problem is that I get no enumeration values. I will not get the nice intellesense when using Visual Studio to write my XML. The following will give me enumerations but it is case sensitive.

<xs:simpleType name="setDigitalPointType">
    <xs:restriction base="xs:string">
        <xs:enumeration value="on" />
        <xs:enumeration value="off" />
    </xs:restriction>
</xs:simpleType>

This will give me my enumerations but if I ever receive a value of "On", "ON", or "oN" it will fail verification.

I want enumeration of "on", "off" and allow entry of case insensitive versions.

Solution

IBM developerWorks has an article on how to use XSLT to perform the construction of the full set of enumeration alternatives in an automated fashion. It is presented as a workaround to the lack of case-insensitive enumerations.