hi alisa, thanks for the reply.
could you provide some information what exactly the identifier in quantopian is? i mean is it the exchange ticker (if so it would be useful to provide the exchange information as well), the morningstar ticker, ..... ?
the problem is that it is very likely that for some of the stocks, ofher dataproviders (bloomberg, reuters etc.) have different symbols. so i doubt quantopian could merge this information automatically. therefore i asked whether there is a way to get the isins or cusips for the symbols you use in quantopian. providing this information would make the integration of additional dataproviders much easier. do you see what i mean?