Invalid? docbook5 export of de/Presentations/Beamer.lyx

[Thibaut Cuvelier]

On Sat, 25 Jul 2020 at 18:59, Richard Kimberly Heck <rikiheck at lyx.org>
wrote:

> On 7/25/20 12:19 PM, Kornel Benko wrote:
> > Export to docbook5 --> OK
> > Check the exported with xmllint
> >
> >       $ xmllint --valid -sax Beamer.xml
> > ...
> > SAX.startElementNs(Subsection, NULL, 'http://docbook.org/ns/docbook',
> 0, 0, 0)
> > SAX.characters(Basic Ideas for Proofs/Impleme, 38)
> > SAX.endElementNs(Subsection, NULL, 'http://docbook.org/ns/docbook')
> > SAX.characters(
> > , 1)
> > SAX.error: error parsing attribute name
> > SAX.error: attributes construct error
> > SAX.error: Couldn't find end of Start Tag Section line 199
> > SAX.characters(*>Summary, 9)
> > SAX.error: expected '>'
> > SAX.error: Opening and ending tag mismatch: section line 197 and Section
> > ...
> > SAX.error: error parsing attribute name
> > SAX.error: attributes construct error
> > SAX.error: Couldn't find end of Start Tag Subsection line 231
> > SAX.characters(*>For Further Reading, 21)
> > SAX.error: expected '>'
> > SAX.error: Opening and ending tag mismatch: section line 162 and
> Subsection
> > ...
> > SAX.error: Opening and ending tag mismatch: article line 4 and section
> > SAX.error: Extra content at the end of the document
>
> Knowing roughly how this works, I expect that getting beamer files to
> export properly may be something of a challenge.
>

Maybe a challenge on the LyX side, but at least also on the DocBook side:
there is a schema customisation for presentations, DocBook Slides (
https://docbook.org/schemas/5x-custom.html#slides). I have never used it,
so I don'treally know how complex it will be to support it.

For now, it's very low priority for me, there is still enough work to do on
articles and books :). (By the way, the only known issue right now: nested
lists do not always work. I have not yet started to work on this.)
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