The use case is I have a product lookup with a key called "model". Each product can have many models. Also I would like to lookup the data via the models.

The indexes for Datahike are the same as they are for Datomic, afaik. https://docs.datomic.com/on-prem/query/indexes.html Each datom is indexed by default in the eavt- and the aevt-index, that makes lookups by entities or attributes super fast.

:thumbsup: I was wondering about AVET when I have a :db/index attribute that is also "many". I guess the lookup is fast for all values? Let's say I have a product with model names (many strings).

The avet-index looks something like this:

:attribute1 "foo" 12345 time
:attribute1 "bar" 12346 time
:attribute2 "baz" 12347 time

ok cool