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Subject: Re: DOCBOOK: ELEMENT declaration in DTD
mike@sojurn.lns.pa.us said: > Everywhere in the DocBook DTD files one sees lines like: > <!ELEMENT foobar - - ((some|stuff)*)> or > <!ELEMENT foobar - O ((some|stuff)*)> > What are the '-' and 'O' doing in there? A case of virtual beer if > you include an XML Spec. section citation. :-) I've answered my own question. The '- -' and '- O' indicate 'Required'/'Optional' begin and end tags. And (this is where my confusion lay), it is allowed in the more general SGML and _not_ in XML. BTW, discovered this by looking at the source of a dtd2html PERL script. I love Open Source. :-) Thanks anyway. -- Mike Sangrey mike@sojurn.lns.pa.us Landisburg, Pa. There is no 'do' in faith, everywhere present within it is 'done'.
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