Standards

LexPons builds on and contributes to the following open standards and execution frameworks.

Standard	Layer	Use case in LexPons	Runtime
AKN4EU (Akoma Ntoso for EU)	Canonical knowledge	Source-linked legal mapping, JSON/XML output	Any
Catala	Execution	Statutory logic, EU AI Act formal modelling	Catala compiler (VPS)
OpenFisca	Execution	Obligation calculations, eligibility, what-if	Python (VPS)
OPA / Rego	Delivery format	Policy distribution, cloud control planes	OPA runtime
Neo4j / GraphQL	Knowledge graph	Cross-regulation traceability, impact analysis	Neo4j (self-host)