After some experiments I am now fairly convinced that the entities are substituted BEFORE the typesettting actually starts. And thus changing the entity on the fly will have no effect. Is there a flag that can be set in order to delay the substitution until the actual moment of typesetting that part of the input? I examined files lxml-ent.lua and lxml-tex.lua but could not find how to this.

dr. Hans van der Meer

> On 17 Apr 2023, at 18:11, Hans van der Meer via ntg-context <ntg-context@ntg.nl> wrote:
> 
> I tried 
> \directlua{xml.registerentity("DATE","NEWDATE")}
> 
> but neither does effect a change in the entity.
> 
> Why is that entry not set in the Lua-table entities? (file xml-ent.lua) has as that function:
> 
> function xml.registerentity(key,value)
>     entities[key] = value
>     if trace_entities then
>         report_xml("registering entity %a as %a",key,value)
>     end
> end
> 
> 
>> On 17 Apr 2023, at 12:32, Hans van der Meer <havdmeer@ziggo.nl> wrote:
>> 
>> I would like to change an entity 'on the fly'. Example
>> 
>> \def\DATE{THEDATE}\expanded{\xmlsetentity{DATE}{\DATE}}
>> 
>> \startxmlsetups typ:event
>> 
>> 	\def\DATE{NEWDATE}\expanded{\xmlsetentity{DATE}{\DATE}}
>> 
>> Using &DATE; within the <event>.
>> 
>> \stopxmlsetups
>> 
>> However, using &DATE; inside an <event> always results in THEDATE and never in NEWDATE.
>> 
>> How can I change the value of the entity inside the xmlsetups?
>> 
> 
> dr. Hans van der Meer
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