Attribute type NMTOKEN

Chris Maden crism at
Fri May 8 22:27:46 BST 1998

[John E. Simpson]
> As I understand it (would appreciate being corrected if wrong),
> NMTOKEN essentially applies a constraint on the form of the
> attribute's value (i.e.  value must be a valid name token -- start
> with either a letter or an underscore) without constraining the
> *specific* value. So yes, your "open-ended or... too big to list"
> assumption is correct, with the qualification that a type of NMTOKEN
> would not allow a value such as "1ABC," "//ENGLISH," or

A possible misunderstanding here: a NMTOKEN itself can't contain
whitespace, but the attribute value specification, the quoted thing
after the equals sign, can: so
<my-element my-name-token="  WHITESPACE">
*is* a valid NMTOKEN attribute specification.  The NMTOKEN in this
example is only "WHITESPACE", though; the leading (and trailing)
whitespace is trimmed.

<!ENTITY crism PUBLIC "-//O'Reilly//NONSGML Christopher R. Maden//EN"
"<URL> <TEL>+1.617.499.7487
<USMAIL>90 Sherman Street, Cambridge, MA 02140 USA" NDATA SGML.Geek>

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