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In message <9705281416.AA11586@s...> lee@s... writes: > Peter Murray-Rust wrote: > > As far as I can see, in > > validated SGML > > > > <!Doctype A [ > > <!ELEMENT A - o EMPTY> > > ]> > > <A> > > > > and > > > > <!DOCTYPE A [ > > <!element a - - ANY> > > ]> > > <A></A> > > > > both return the same result, > That depends on what you mean by "return". ISO 8879 doesn't say anything > about anyone returning things at all. They are not distinguished in ESIS, > but that's just because ESIS is broken in this regard. Understood. In that case the question might be 'for WF XML documents with no Element declaration, are: <A/> and <A></A> identical? > > > Can attributes have null values? is > > > > B="" the same as omitting B when #IMPLIED? > > No, they are not the same -- an attribute value can be zero characters, > as can an element's content. ^^^^^^^^^ My implication from this is that in my second example, A has a child of unknown type of null content OR that A has a #PCDATA child which a content of "". In which case it could have an effect on (say) counting #PCDATA children. If so, it might need flagging in the draft... P. > > Lee > > > xml-dev: A list for W3C XML Developers > Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ > To unsubscribe, send to majordomo@i... the following message; > unsubscribe xml-dev > List coordinator, Henry Rzepa (rzepa@i...) > > -- Peter Murray-Rust, domestic net connection Virtual School of Molecular Sciences http://www.vsms.nottingham.ac.uk/ xml-dev: A list for W3C XML Developers Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ To unsubscribe, send to majordomo@i... the following message; unsubscribe xml-dev List coordinator, Henry Rzepa (rzepa@i...)
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