sharing datatypes : best practice ?

[Taesch, Luc]

i ve developped a datatype in a module P, and another module will use it, and most probably a few others, and its quite central to the apps Im building.

what is the best organisation ?

-import module P everywhere
- isolate this datatype in a module, which would be imported everywhere ?(very "include like")
- merging the module around this datatype ?

this last option  is not a good option here as :
- this would be too big
- P is generated by Happy.

this look very much like a OO/non OO debate, which I dont want to spawn again. 

I can suppose its a FAQ like  question. any good pointer ?

whats the best practice around ?

thanks
Luc

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