SV: Comparing lists to singletons

>For the purpose of XML Schema identity constraints (for example key/keyref),
>is the NMTOKENS value "x" equal to the NMTOKEN value "x"?

>It depends on the definition of "equal" in XML Schema Part 2 section 4.2.1.
>But the definitions there don't shed much light: they discuss union types
>but not list types. It comes down to whether a sequence whose only item is
>the string "x" is the same value (=value-space member) as the string "x",
>and I don't see a statement on that anywhere.

I'd suppose not equal, wouldn't that follow XSD's vision of Typing better?

Cheers,
Bryan Rasmussen