[antlr-interest] HTML Comments
mike dillon
md5 at embody.org
Sun Jun 9 10:47:27 PDT 2002
begin johnclarke72 quotation:
> What is the best approach to writing a grammar for comments in HTML
> that permits you to add comments in it ? eg :
>
> <!-- <!-- Comment --> -->
FYI: this is not actually allowed with HTML comments; they cannot be
nested. The "outer" comment ends with the *first* "-->".
Excerpt from http://www.w3.org/TR/REC-html40/intro/sgmltut.html#h-3.2.4:
3.2.4 Comments
HTML comments have the following syntax:
<!-- this is a comment -->
<!-- and so is this one,
which occupies more than one line -->
White space is not permitted between the markup declaration open
delimiter("<!") and the comment open delimiter ("--"), but is
permitted between the comment close delimiter ("--") and the
markup declaration close delimiter (">"). A common error is to
include a string of hyphens ("---") within a comment. Authors
should avoid putting two or more adjacent hyphens inside
comments.
Information that appears between comments has no special meaning
(e.g., character references are not interpreted as such).
Note that comments are markup.
-md
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