Re: [PATCH] asciidoctor-extensions: provide `<refmiscinfo/>`

> On Tue, Mar 26, 2019 at 09:06:03PM -0400, Todd Zullinger wrote:
>> There's still the matter of 2.0 dropping docbook45.  I'll
>> try to get around to testing 1.5.x releases with docbook5 to
>> see if they work reasonably well.  If not, we can add a
>> version check and set ASCIIDOC_DOCBOOK appropriately.
>> 
>> One other issue that crops up with docbook5 is that the
>> xmlto toolchain now outputs:
>> 
>>     Note: namesp. cut : stripped namespace before processing
>> 
>> as documented at
>> 
>>     https://docbook.org/docs/howto/howto.html#dbxsl
>> 
>> It's mostly an annoyance which we either want to strip out,
>> or pass an alternate docbook5 xsl, I think.  But I'm not
>> very familiar with the guts of the xml/docbook toolchains.
> 
> I'm quite familiar with this area, because I used DocBook and its
> stylesheets for my college papers. There are two sets of stylesheets,
> the namespaced ones (for DocBook 5) and the non-namespaced ones (for
> DocBook 4). They can be distinguished because the URLs (and typically
> the paths) use "xsl" (for non-namespaced) or "xsl-ns" (for namespaced).
> 
> xmlto by default uses the older ones, and assuming you have a reasonably
> capable XSLT processor, either set of stylesheets can be used, since
> they simply transform the document into the right type (although with a
> warning, as you've noticed).
> 
> Unfortunately, xmlto is hard-coded to use the non-namespaced stylesheets
> with no option to specify which to use, and it doesn't appear to be
> actively developed. There's an option to specify the stylesheet (-x),
> but it can't take a URL, since xmlto "helpfully" fully qualifies the
> path. That means we'd need to know the location on disk of those
> stylesheets in order to use them, since we can't rely on catalog
> resolution.