Gerben Wierda via ntg-context schrieb am 03.06.2022 um 00:57:
>> On 19 May 2022, at 18:22, Wolfgang Schuster via ntg-context 
>> <ntg-context@ntg.nl <mailto:ntg-context@ntg.nl>> wrote:
>>
>> You have to provide a minimal example, in the following the example 
>> the text within the frame isn't indented.
>
> I cannot always provide a minimal example (how much I would like to) 
> as my TeX is produced in a pipeline from 5600 lines of lua and 
> METAPOST code.
>
> But luckily, in this case I can, the one using \phrasetext is 
> indented, the other one is not.:
>
> \setuplanguage[en][patterns={en}]\mainlanguage[en]
>
> \definelabelclass[phrase]
>
> \setupphrasetext[en][metamodelexplanation=  {...}]

The space in your text comes from the space between the = and { when you 
set the text for metamodelexplanation.

Wolfgang