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On Thu, 2010-12-16 at 19:23 -0500, Liam R E Quin wrote:
> On Thu, 2010-12-16 at 15:38 -0800, Henri Sivonen wrote:
> > On Dec 16, 2010, at 14:13, Liam R E Quin wrote:
> >
> > > This <syntax /> came from SGML and was already legal in HTML from a
> > > formal standards perspective.
> >
> > My understanding is that Annex K was added to SGML in late 1997 for
> > the specific purpose of making XML 1.0 a subset of SGML. This was
> > after HTML had been deployed.
>
> Yes. But the net syntax was already in SGML:1986.
To clarify (thanks to David Carlisle for pointing this out),
(1) HTML did enable NET tags (so Henri was mistaken in
saying it didn't...) but...
(2) HTML did not change the NET delimiter to "/>" but kept the
default value of "/"
(3) as a result, <br/ was legal HTML, as was <i/content here/, and
was generally implemented by at least some of the SGML-based HTML
tools and programs;
(4) the xml variant, <br/>, is based on changing NET to "/>", and
although any SGML document (and hence any HTML document before
HTML 5) can change the SGML declaration to allow />, the default
was <br/ and not <br/>
(I'd forgotten that change, so I was mistaken too)
Liam
--
Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/
Pictures from old books: http://fromoldbooks.org/
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