What is the format specification for `datomic.databases` in the catalog for presto/analytics?

What is the format specification for datomic.databases in the catalog for presto/analytics?

I’ve been through the on-prem docs for analytics a few times, but I can’t an example of this being specified.

I’ve tried:

datomic.databases=db_one,other_database_name

this fails during presto startup with:

java.lang.IllegalArgumentException: Don't know how to create ISeq from: clojure.lang.Symbol

I’ve tried:

datomic.databases=["db_one" "other_database_name"]

Allows presto to start up, but fails during a query in the client with:

clojure.lang.ExceptionInfo: Expected string for :db-name

If I uncomment the datomic.databases line in the catalog, the queries work. I’m trying to expose more metadata for my “GUI-enabled” colleagues.