Pablo Rodriguez schrieb am 20.04.2020 um 18:55:

Dear list,

I have the following sample:

\startbuffer[demo] <doc> <section id="section-i1"> <text>first</text> </section> <section id="section-i2"> <text>second</text> </section>

</doc> \stopbuffer

\startxmlsetups xml:initialize \xmlsetsetup{#1}{doc|section}{xml:*} \stopxmlsetups

\xmlregistersetup{xml:initialize}

\startxmlsetups xml:doc \xmlflush{#1} \stopxmlsetups

\startxmlsetups xml:section \startsection[title={\xmlatt{#1}{id}}, beforesection={\doif{\xmlatt{#1}{id}}{\selectedtopic} {conditional}}] \xmlflush{#1} \doif{\xmlatt{#1}{id}}{\selectedtopic}{conditional} \stopsection \stopxmlsetups

\def\selectedtopic{section-i1}

\starttext \xmlprocessbuffer{main}{demo}{} \stoptext

How can I make the conditional in the beforesection option work?

The argument of the beforesection-key is placed before ConTeXt stores the values of \startsection which means you can do it this way. What you can do here is to put whatever something in a macro before you call \startsection and access the value of this macro with the beforesection-key. You should ensure the content if this temporary macro is cleared when your conditional is false. \setuphead [section] [beforesection=\getvariable{xml}{beforesection}] \startxmlsetups xml:section \doifelse{\xmlatt{#1}{id}}{\selectedtopic} {\setvariable{xml}{beforesection}{conditional}} {\setvariable{xml}{beforesection}{}} \startsection[title={\xmlatt{#1}{id}}] \xmlflush{#1} \stopsection \stopxmlsetups Wolfgang