XSD validating value of child reference element

I need to create an XSD that validates the value in a specific compl开发者_高级运维ex type from a different namespace with specific enumerations.

In this specific case the XML will look like this:

            <Format>
                <name>
                    <gco:CharacterString>IMG</gco:CharacterString>
                </name>
                <version>
                    <gco:CharacterString>Version 1.0</gco:CharacterString>
                </version>
            </Format>

It is a requiremement that all values validate as gco:CharacterString referenced from a seperate namespace (this is really a simple xs:string type in the other namespace, but I need to reference it).

I need name and version to validate for specific enumerations of values inside their gco:CharacterString child node. In this case I want to validate that the following enumerations exist and are valid for gco:Characterstring:

name: IMG GEO NIT

version: version 1.0 version 2.0 version 3.0

Adding the enumerations to the referenced gco:Characterstring isn't an option, because I need these to be specific for both version and name. Is this possible to set this up in the XSD?

Not in XML Schema 1.0.

With XML Schema 1.1 - something like:

<assert test="(name/gco:CharacterString eq 'IMG)
              and (version/gco:CharacterString eq 'Version 1.0')"/>

It's not possible in XSD 1.0. There's a built-in assumption in XSD that the rules for validating elements in a namespace are context-free: that is, if one namespace imports another, the rules for elements in the second namespace won't depend on where the elements occur. I would suggest you're not using namespaces "properly".