xml-dev - Re: Commercial job postings?

[Peter@ursus.demon.co.uk (Peter Murray-Rust)]

In message <9705281416.AA11586@sqrex.sq.com> lee@sq.com 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
> 
> 
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-- 
Peter Murray-Rust, domestic net connection
Virtual School of Molecular Sciences
http://www.vsms.nottingham.ac.uk/

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