From: Hans Hagen <pragma@wxs.nl>
To: ntg-context@ntg.nl
Subject: Re: xml in lua: how to say "ancestor"?
Date: Sat, 25 Feb 2017 19:30:08 +0100 [thread overview]
Message-ID: <3009791c-6b1b-1451-c27d-5b67355945d1@wxs.nl> (raw)
In-Reply-To: <701bd314-f844-9f05-9baa-22599287c258@uni-bonn.de>
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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next prev parent reply other threads:[~2017-02-25 18:30 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-25 16:18 Thomas A. Schmitz
2017-02-25 18:30 ` Hans Hagen [this message]
2017-02-25 19:24 ` Thomas A. Schmitz
2017-02-25 20:10 ` Hans Hagen
2017-02-25 20:35 ` Thomas A. Schmitz
2017-02-25 20:49 ` Hans Hagen
2017-02-25 21:15 ` Thomas A. Schmitz
2017-03-03 16:47 ` Thomas A. Schmitz
2017-03-04 9:37 ` Hans Hagen
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