Too much latitude in Nmtoken characters?
Eric Baatz - Sun Microsystems Labs BOS
ebaatz at barbaresco.East.Sun.COM
Thu Jul 10 21:46:41 BST 1997
I don't understand why such a wide choice of characters are allowed in
in the June XML Syntax specification.
 Nmtoken ::= (NameChar)+
 NameChar ::= Letter | Digit | MiscName
 MiscName ::= '.' | '-' | '_' | ':' | CombiningChar | Ignorable | Extender
 Ignorable ::= a whole bunch of characters like "zero width non-joiner",
"right-to-left mark", and "zero width no-break space"
This seems to allow Nmtokens that aren't visible to the human eye,
for example, consisting of a single zero width non-joiner.
My limited understanding of SGML suggests that a Nmtoken is more like
a Name rather than a superset of it. For that matter, is "9" a sensible
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