Re: [NTG-context] dealing with the lang attribute in XML

6 Jan 2015

      On 1/6/2015 10:12 PM, Pablo Rodriguez wrote:
...
Dear list,
I’m trying to write an environment to typeset HTML generated by pandoc
with ConTeXt MkIV.
One of the issues I’m experiencing is dealing with the lang attribute.
The required sample:
\startbuffer[demo]
<doc lang="en">
<p>This is an English paragraph.</p>
<p lang="de">Aber dieser Absatz ist auf Deutsch und enthält Spanisch
   (<span lang="es-ES">prueba</span>).</p>
</doc>
\stopbuffer
\starttext
\hsize\zeropoint
\startxmlsetups xml:initialize
      \xmlsetsetup{#1}{p|doc|span}{xml:*}
\stopxmlsetups
\xmlregistersetup{xml:initialize}
\startxmlsetups xml:doc
     \mainlanguage[\xmlatt{#1}{lang}]
     \xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:p
      \begingroup\language[\xmlatt{#1}{lang}]\xmlflush{#1}\endgroup\par
\stopxmlsetups
\startxmlsetups xml:span
      \begingroup\language[\xmlatt{#1}{lang}]\xmlflush{#1}\endgroup
\stopxmlsetups
\xmlprocessbuffer{main}{demo}{}
\stoptext
The question is how to deal with the lang attribute in a single
xmlsetup (at least for p and span [not all those elements might have a
lang attribute, they can inherit it]).
And a second question would be: how can I deal with language values in
XML and ConTeXt? A \processaction command?
there is \xmlval cum suis for mapping attributes but in this case you 
can just use \language and define language synomyms if needed
...
Many thanks for your help,
\startxmlsetups xml:initialize
      \xmlsetsetup{#1}{*}{xml:*}
      \xmlsetsetup{#1}{(p|span)[@lang]}{xml:lang}
\stopxmlsetups

\xmlregistersetup{xml:initialize}

\startxmlsetups xml:lang
     \begingroup
         \language[\xmlatt{#1}{lang}]
         \xmlsetup{#1}{xml:\xmltag{#1}}
     \endgroup
\stopxmlsetups

\startxmlsetups xml:doc
     \mainlanguage[\xmlatt{#1}{lang}]
     \xmlflush{#1}
\stopxmlsetups

\startxmlsetups xml:p
      \xmlflush{#1}
      \par
\stopxmlsetups

\startxmlsetups xml:span
      \xmlflush{#1}
\stopxmlsetups

Here is a solution that can save you some time:

\usemodule[html]

\startxmlsetups xml:initialize
     \xmlsetup{#1}{xml:html:basics}
     \xmlsetup{#1}{xml:html:tables}
     \xmlsetsetup{#1}{(p|span)[@lang]}{xml:lang}
\stopxmlsetups

\xmlregistersetup{xml:initialize}

\startxmlsetups xml:lang
     \begingroup
         \language[\xmlatt{#1}{lang}]
         \xmlsetup{#1}{xml:html:\xmltag{#1}}
     \endgroup
\stopxmlsetups

(some reasonable defaults)

Hans

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