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- From: Chris Maden <email@example.com>
- To: firstname.lastname@example.org
- Date: Fri, 17 Jul 1998 12:16:42 -0400 (EDT)
> Although the XML specification makes clear that "--" is not allowed
> in comments, there is another case that is less clear. Can the body
> of a comment end in a single hyphen, that is, is a comment like
> "<--A+, A or A--->" legal? There is no explicit mention of this in
> the text of the specification, but a careful read of the grammar
> does not allow it.
Correct. The production reflects the SGML reality that -- ends a
comment. In SGML terms:
'<!' starts the comment declaration in your example.
'--' starts the comment.
'A+, A or A' is the content of the comment.
'--' ends the comment.
'-' is an error.
'>' could be considered to end the comment declaration, but
we're now in error-recovery mode, and outside the scope
of the specification.
<!--A+, A or A- --> is a legal comment.
<!NOTATION SGML.Geek PUBLIC "-//Anonymous//NOTATION SGML Geek//EN">
<!ENTITY crism PUBLIC "-//O'Reilly//NONSGML Christopher R. Maden//EN"
<USMAIL>90 Sherman Street, Cambridge, MA 02140 USA" NDATA SGML.Geek>
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