On 11/16/22 19:56, mf via ntg-context wrote:
local ch_id = t.at["ch:id"]
You're right, of course, using a colon was a stupid idea. When I replace it with an underscore, you can see that both are in fact identical: \startbuffer[test] <document> <topics> <topic t_id="test1"> <title>This is the first test</title> <date>22/11/16</date> </topic> <topic t_id="test2"> <title>This is the second test</title> <date>22/11/17</date> </topic> </topics> <chapters> <chapter ch_id="test1"> <content> This will be the content of the <emph>first</emph> chapter. </content> </chapter> <chapter ch_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 chapter_id = t.at.ch_id local other_chapter_id = t.at["ch_id"] context (chapter_id) context.par () context (other_chapter_id) context.par () local metadata = xml.filter (t, '../../topics/topic[@t:id=="%s"]', ch_id) print (inspect(metadata)) lxml.command(t, ".", "xml:chapter:content") context.par () end \stopluacode \starttext \xmlprocessbuffer{main}{test}{} \stoptext