[xsl] List of illegal characters for element, attribute, and variable names.

[cknell@xxxxxxxxxx]

I'm preparing some training materials for a group without much exposure to XML. I started to write about what form a name (for an element, attribute, or variable) can take. Specifically, what characters are not permitted. It was easy at first, but then I realized I should find an authoritative source. I googled, but came up empty. Either I asked for the wrong thing, or I couldn't recognize the right thing when I saw it. Can someone point me to a resource? Thanks.

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Charles Knell
cknell@xxxxxxxxxx - email