On 2/25/2017 5:18 PM, Thomas A. Schmitz wrote:
Hi all,
no real example, just snippets, sorry: I need to process xml documents
in lua (because I want to collect information in tables). The structure
is a bit irregular:
<document>
<chapter title="One">
<section title="One">
<subsection title="One">
Text
</subsection>
</section>
</chapter>
<chapter title="Two">
<subsection title="One">
Text
</subsection>
</chapter>
</document>
So chapters may or may not have sections. If, on the level of my
subscetions, I want to extract the information of the chapter title, in
a ConTeXt environment, I could say
\xmlattribute{#1}{ancestor::chapter}{title}. How could I do the same in
lua? I have something like
xml.attribute(e, "../../chapter", "title", "")
but that only works for the first case, not the second one. I tried to
understand the lpegs in lxml-lpt.lua, but didn't succeed.
Thanks, and best wishes
\starttext
\startbuffer[test]
<document>
<chapter title="OneC">
<section title="OneS">
<subsection title="OneSS">
Text
</subsection>
</section>
</chapter>
<chapter title="TwoC">
<subsection title="OneSS">
Text
</subsection>
</chapter>
</document>
\stopbuffer
\startxmlsetups xml:test:setups
\xmlsetsetup{\xmldocument}{*}{xml:*}
\stopxmlsetups
\xmlregistersetup{xml:test:setups}
\startxmlsetups xml:document
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:chapter
\blank[2*big] CHAPTER: \xmlattribute{#1}{.}{title}\blank
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:section
\blank SECTION: \xmlattribute{#1}{.}{title} \blank\relax
(previous:\xmlattribute{#1}{..[tag()='chapter']}{title})
\blank
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:subsection
\blank SUBSECTION: \xmlattribute{#1}{.}{title} \blank\relax
\blank
(previous:\xmlattribute{#1}{..[tag()='section' or
tag()='chapter']}{title})
\blank
\xmlflush{#1}
\stopxmlsetups
\xmlprocessbuffer{main}{test}{}
\stoptext
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