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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