How to create ontology alignment rules?

[KMax]

I have a large (billions of triples) and a small (millions of triples) datasets in two separate triplestores. They have similar data (about organizations, etc.), but use different schemas, so I need to define some alignment rules to be able to execute federated queries to them.

As I understand the alignment rules are stored in a Postgres (realized thanks to https://github.com/semagrow/semagrow/blob/main/http/src/main/resources/repository.ttl). But I didn't find documentation about an editor which could be used to create these rules. Could you help me with that?