[Tagging] Best practices for creating a categorical key=value

[Marc_marc]

Le 18.01.23 à 16:22, Daniel Bégin a écrit :
> the mapping of a company that produces and installs precast concrete 
> could be tagged as…
> 
> office=construction_company
> 
> construction_company=precast_concrete
> 
> but I have my doubts on the best way to do it. Any suggestion?
> 

tag linking (A=B B=C) is very common and a good pratice
but is precast_concrete a correct 2nd level value ?
does the company manufacture concrete? or concrete elements?
in the 2nd case I would rather choose the type of use (building,
small street cabinet, ...)