From: Hans Hagen via ntg-context <ntg-context@ntg.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Cc: Hans Hagen <j.hagen@xs4all.nl>
Subject: Re: Dynamic document variables from metadata
Date: Sun, 2 Jan 2022 12:11:32 +0100 [thread overview]
Message-ID: <84b1ed66-d8ae-7571-6f0f-7fa099061540@xs4all.nl> (raw)
In-Reply-To: <CAANrE7rWY5SCSazHYPxOX6+KOJfgHag4ZFUHvoeMTAkmZW416A@mail.gmail.com>
On 1/2/2022 2:54 AM, Thangalin via ntg-context wrote:
> Happy New Year!
>
> How would you implement a mechanism that takes arbitrary XHTML <meta>
> tags and produces document variables? Consider:
>
> <meta name="journal" content="Nature" />
>
> After running XML setups, the following would write "Nature":
>
> \documentvariable{journal}
>
> The tricky part is doing this without pre-defining them. Here's a short,
> self-contained example to help demonstrate:
>
> |\startbuffer[xdoc] <html> <head> <meta content="Milena Marić Einstein"
> name="author"/> <meta content="Annalen der Physik" name="journal"/>
> </head> <body> </body> </html> \stopbuffer \startxmlsetups xml:xhtml
> \xmlsetsetup{\xmldocument}{*}{-}
> \xmlsetsetup{\xmldocument}{html|body}{xml:*}
> \xmlsetsetup{\xmldocument}{head}{xml:meta} \stopxmlsetups
> \xmlregistersetup{xml:xhtml} \startxmlsetups xml:html
> % "author" is a special setup, not generalized
> \xmlfilter{#1}{/head/meta[@name='author']/command(xml:author)} % What
> goes here to make this dynamic?
> %\xmlfilter{#1}{/head/meta[@name='journal']/command(xml:journal)}
> \xmlflush{#1} \stopxmlsetups \startxmlsetups xml:author
> \setupdocument[author={\xmlatt{#1}{content}}]
> \setupdocument[metadata:author={\xmlatt{#1}{content}}]
> \setupinteraction[author={\documentvariable{author}}] \stopxmlsetups %
> How can this be generalized? %\startxmlsetups xml:journal
> %\setupdocument[journal={\xmlatt{#1}{content}}] %\stopxmlsetups
> \startxmlsetups xml:body \startdocument Author:
> \documentvariable{author} \par Journal: \documentvariable{journal}
> \stopdocument \stopxmlsetups \xmlprocessbuffer{main}{xdoc}{}|
\startxmlsetups xml:setdocumentvariable
\setupdocument[\xmlatt{#1}{name}={\xmlatt{#1}{content}}]
\stopxmlsetups
\startxmlsetups xml:author
\setupdocument[author={\xmlatt{#1}{content}}]
\setupdocument[metadata:author={\xmlatt{#1}{content}}]
\setupinteraction[author={\documentvariable{author}}]
\stopxmlsetups
\startxmlsetups xml:html
\xmlfilter{#1}{/head/meta/command(xml:setdocumentvariable)}
\xmlfilter{#1}{/head/meta[@name='author']/command(xml:author)}
\startdocument
\xmlflush{#1}
\stopdocument
\stopxmlsetups
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next prev parent reply other threads:[~2022-01-02 11:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-02 1:54 Thangalin via ntg-context
2022-01-02 11:11 ` Hans Hagen via ntg-context [this message]
2022-01-02 19:15 ` Thangalin via ntg-context
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