about dtd

[hantechs]

I read the html specification and encounter the following dtd for LABEL
element:
<!ELEMENT LABEL - - (%inline* -(LABEL) -- form field label text -->
what's the meaning of these dash? and %inline;? Thanks.

 

[David Dorward]

I read the html specification and encounter the following dtd for LABEL
element:
<!ELEMENT LABEL - - (%inline* -(LABEL) -- form field label text -->
what's the meaning of these dash? and %inline;? Thanks.

http://www.w3.org/TR/html4/intro/sgmltut.html#h-3.3 covers that.

 

[hantechs]

It's very helpful. Thank you.

David Dorward 写é“：

 

[Peter Flynn]

I read the html specification and encounter the following dtd for LABEL
element:
<!ELEMENT LABEL - - (%inline* -(LABEL) -- form field label text -->
what's the meaning of these dash? and %inline;? Thanks.

That's not XML, it's SGML.

The two dashes are minimization indicators for the start-tag and end-tag
respectively (here meaning that both must be present: don't forget that
SGML can allow start-tags and end-tags to be absent-but-implied);

The %inline; is a Parameter Entity: meaning exactlty the same as in XML,
that the parser substitutes the value of the entity declared earlier;

The minus before (LABEL) means it's an exclusion exception: LABEL may
not occur in the content of LABEL even if %inline; says it may (another
SGML feature omitted from XML);

The comment at the end between double dashes is just a comment, but this
syntax is also forbidden in XML.

///Peter