Blank value in attribute list

Richard Tobin richard at
Mon Jun 28 15:21:00 BST 1999

> How does one specify in the DTD so that the attribute
> is required and is one of the values of the possible
> values.

You can't do this.  The allowed values for an enumeration type are
NMTOKENs, and the empty string is not an NMTOKEN.

-- Richard

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