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
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------