Re Datalog syntax: yes, the "composability" is the main reason that I decided to adopt it as the query language. This is also the reason why we made storing que

Re Datalog syntax: yes, the "composability" is the main reason that I decided to adopt it as the query language. This is also the reason why we made storing query results back into the database very easy (no pre-declaration of "tables" necessary) so that intermediate results can be materialized in the database at will and be used by multiple subsequent queries.