Re: Question

[William F H. <ge...@gm...>]

On Sat, Feb 12, 2022 at 1:58 PM Chris Moller <mo...@mo...> wrote:

> I have a document writth in SGML Docbook and I'm trying to convert it to
> XML Docbook, but
>
> docbook2pdf tryit.xml
>
> comes up with a bunch of lines like
>
> jade:/usr/share/sgml/docbook/xml-dtd-4.5/ent/isogrk4.ent:42:30:E: "1D6C2"
> is not a character number in the document character set
>
> I assume I'm missing a font or something, but it's not clear how to fix
> this.  Any help would be appreciated.
>
>
> Linux hpbox 5.14.18-100.fc33.x86_64 #1 SMP
>
> Thanks,
> Chris Moller
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Curious.  It looks like something of an anachronism in that  U+1D6C2 is
plane 1 Unicode and, the last time I checked, jade was not handling
anything beyond plane 0.

I do not have anything called "docbook2pdf" handy here.  Apparently it is
calling openjade.  I believe that OpenJade and OpenSP work with XML
document types as SGML document types under an "SGML declaration for XML".
My guess is that the SGML declaration for XML *that you are using *does not
allow characters beyond plane 0.  You could probably eliminate *this *complaint
about  U+1D6C2 (mathematical bold small alpha) simply by a fairly simple
editing of the SGML declaration for XML.  But, the last time I checked,
OpenSP was not parsing plane 1 characters correctly.  I complained about
this in a talk I gave at TUG2020.  BTW, the copy of ISOgrk4.ent that I have
resolves "b.alpha" to "&#x03B1;", the XML CDATA reference for U+03B1 (greek
small letter alpha).
If that has been updated in a way that is compatible with openjade, then
maybe the version of openjade underneath docbook2pdf has been fixed.

Good luck.

William F Hammond
Email: ge...@gm...
https://www.facebook.com/william.f.hammond
http://www.albany.edu/~hammond/

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