> > Hyphens are not allowed in variable names.
> 
> Oh yes they are.

Silly me.

"Both xsl:variable and xsl:param have a required name attribute, which
specifies the name of the variable. The value of the name attribute is a
QName, which is expanded as described in [2.4 Qualified Names]."

(QName as defined by XML 1.0):
[6]  QName ::=  (Prefix ':')? LocalPart 
[7]  Prefix ::=  NCName 
[8]  LocalPart ::=  NCName 
[4]  NCName ::=  (Letter | '_') (NCNameChar)* /*  An XML Name, minus the ":"
*/ 

I got this far and stopped reading! Variable names can't start with a
hyphen, but may contain any of them:

[5]  NCNameChar ::=  Letter | Digit | '.' | '-' | '_' | CombiningChar |
Extender 

This makes me want to make a variable named _-._.-._.-._  just for kicks.
Sorry for the misinformation.


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