Hi Thomas.
I'm not sure about the code, sorry, but I do know that an XML document
can't have two IDs of the same value. Typically you would use a linkend
attribute on the element which is referencing an id (in this case the
topics, I think).
Probably doesn't help with your problem, but it's likely a prerequisite for
it to work.
Bests,
Duncan
On Wed, 16 Nov 2022 at 16:11, Thomas A. Schmitz via ntg-context <
ntg-context@ntg.nl> wrote:
> Hi all,
>
> I thought this was easy, but I overestimated my competence… I want to
> filter xml elements via their attributes and retrieve and typeset parts
> belonging together. Here is a small test file that explains what I’m trying:
>
> \startbuffer[test]
> <document>
> <topics>
> <topic id="test1">
> <title>This is the first test</title>
> <date>22/11/16</date>
> </topic>
> <topic id="test2">
> <title>This is the second test</title>
> <date>22/11/17</date>
> </topic>
> </topics>
> <chapters>
> <chapter id="test1">
> <content>
> This will be the content of the <emph>first</emph> chapter.
> </content>
> </chapter>
> <chapter id="test2">
> <content>
> This will be the content of the <emph>second</emph> chapter.
> </content>
> </chapter>
> </chapters>
> </document>
> \stopbuffer
>
> \startxmlsetups xml:testsetups
> \xmlsetsetup{#1}{*}{-}
> \xmlsetsetup{#1}{document|chapters|chapter|content|emph}{xml:*}
> \stopxmlsetups
>
> \xmlregistersetup{xml:testsetups}
>
> \startxmlsetups xml:document
> \xmlflush{#1}
> \stopxmlsetups
>
> \startxmlsetups xml:chapters
> \xmlflush{#1}
> \stopxmlsetups
>
> \startxmlsetups xml:chapter
> \xmlfunction {#1} {chapter}
> \xmlflush {#1}
> \stopxmlsetups
>
> \startxmlsetups xml:chapter:content
> \xmltext {#1} {content}
> \stopxmlsetups
>
> \startxmlsetups xml:emph
> {\em \xmlflush {#1}}
> \stopxmlsetups
>
> \startluacode
> function xml.functions.chapter (t)
> local ch_id = t.at.id
> local metadata = xml.filter (root,
> '../../topics/topic[@id=="%s"]', ch_id)
> print (inspect(metadata))
> lxml.command(t, ".", "xml:chapter:content")
> context.par ()
> context (ch_id)
> context.par ()
> end
> \stopluacode
>
> \starttext
> \xmlprocessbuffer{main}{test}{}
> \stoptext
>
> The line with xml.filter does not work as I expected. How can I walk the
> tree, find the “topic” element with the same “id” attribute as the chapter
> I’m currently in, and then typeset the different children of the topic
> element?
>
> Thanks a lot and all best
>
> Thomas
>
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to
> the Wiki!
>
> maillist : ntg-context@ntg.nl /
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>
> ___________________________________________________________________________________
>
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context
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archive : https://bitbucket.org/phg/context-mirror/commits/
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