I found a workaround for anyone interested:


\setupinteraction[state=start,focus=standard]

\starttext

\startplaceformula[title=$\alpha$,reference=alpha]

\startformula

1 + 1 = 2

\stopformula

\stopplaceformula

\dorecurse{20}{\samplefile{knuth}}

I'm in \in{$\alpha$}[alpha] %so the reference is now visible

\stoptext

However, one has to manually write a label and a title independently, so
I'm not sure that's a clean solution...

Best regards,

Jairo

El lun, 22 de feb. de 2021 a la(s) 23:28, Jairo A. del Rio (
jairoadelrio6@gmail.com) escribió:

> Hi again. The following doesn't work (the tag is missing):
>
> \startTEXpage[offset=2bp]
> \startplaceformula[title=A,reference=alpha]
>      \startformula
>          1 + 1 = 2
>      \stopformula
> \stopplaceformula
> I'm in \in[alpha]
> \stopTEXpage
>
> Jairo
>
> El lun, 22 de feb. de 2021 a la(s) 09:00, Jairo A. del Rio (
> jairoadelrio6@gmail.com) escribió:
>
>> Oh, dumb me, sorry for the noise and thank you very much. Not every day
>> is a good one, sorry again.
>>
>> Jairo.
>>
>> El lun, 22 de feb. de 2021 a la(s) 08:51, Hans Hagen (j.hagen@xs4all.nl)
>> escribió:
>>
>>> On 2/22/2021 2:05 PM, Jairo A. del Rio wrote:
>>> > Hi. list.
>>> > Is it possible to assign an arbitrary equation tag in ConTeXt? I've
>>> seen
>>> > solutions here;
>>> >
>>> >
>>> https://tex.stackexchange.com/questions/400257/tag-equation-in-context-with-arbitrary-text
>>> > <
>>> https://tex.stackexchange.com/questions/400257/tag-equation-in-context-with-arbitrary-text
>>> >
>>> >
>>> > but none of them works as expected (either the formula counter is
>>> still
>>> > incrementing with arbitrary conversions or cross-references don't
>>> work).
>>>
>>> Define 'expected' ... \eqno is something low level (a primitive) and we
>>> have that nilled at the user level and only use it deep down. It was
>>> never meant as user command.
>>>
>>> > I imagine some things have changed in 2021 and I hope a better
>>> solution
>>> > is feasible nowadays.
>>>
>>> \startTEXpage[offset=2bp]
>>> \startplaceformula[title=A]
>>>      \startformula
>>>          1 + 1 = 2
>>>      \stopformula
>>> \stopplaceformula
>>> \stopTEXpage
>>>
>>> Hans
>>>
>>> -----------------------------------------------------------------
>>>                                            Hans Hagen | PRAGMA ADE
>>>                Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>>>         tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
>>> -----------------------------------------------------------------
>>>
>>