https://www.openpolicyagent.org/docs/policy-language https://www.openpolicyagent.org/docs/policy-language Not quite Prolog as they teach in universities, but it

https://www.openpolicyagent.org/docs/policy-language https://www.openpolicyagent.org/docs/policy-language Not quite Prolog as they teach in universities, but its close descendant. Used for policy evaluation, e.g. to validate tree-structured datasets against arbitrary permission rule sets.