ODGS FLINT Bridge

The ODGS FLINT Bridge is an open-source institutional connector that translates TNO FLINT (Formal Language for the Interpretation of Normative Texts) Linked Data into ODGS Executable Enforcement Rules.

It bridges the semantic legal ontology layer with the ODGS enforcement engine — connecting "Rules as Code" (Regels als Code) ecosystems to live data pipelines.

See it in action

A GDPR Article 33 breach-notification norm is compiled into a real ES256-signed rule pack; a 30-hour notice is APPROVED, a 118-hour notice is HARD_STOP-blocked — real engine, real Ed25519 audit seal.

Install

pip install odgs-flint-bridge

CLI

After install, the odgs-flint command is available:

# Compile a FLINT JSON-LD file and print the rule
odgs-flint sample_flint.json

# Compile and save to a file
odgs-flint sample_flint.json --output my_rule.json

# Compact output (no indentation)
odgs-flint sample_flint.json --compact

On file save, the CLI prints a summary:

Rule written to my_rule.json
  semantic_hash:  a3f8c2d1...
  urn:            urn:odgs:rule:flint:zorgtoeslag_art5_p1
  effective_from: 2026-01-01   (if declared in flint:period)

Python API

from odgs_flint_bridge.parser import FlintParser
from odgs_flint_bridge.compiler import OdgsCompiler

# Load your FLINT JSON-LD payload
flint_payload = {
    "@type": "flint:Fact",
    "flint:identifier": "urn:flint:fact:zorgtoeslag:art5:p1",
    "flint:name": "Zorgtoeslag Threshold",
    "flint:sourceReference": "https://wetten.overheid.nl/BWBR0018988/",
    "flint:expression": {
        "flint:subject": "inkomen",
        "flint:operator": "LESS_THAN_OR_EQUAL",
        "flint:targetValue": 35000
    }
}

# Parse → Compile  (FlintParser.parse() auto-routes by @type)
parsed = FlintParser.parse(flint_payload)
rule = OdgsCompiler.compile_rule(parsed)

print(rule["semantic_hash"])  # SHA-256 of the source FLINT JSON-LD
print(rule["urn"])             # urn:odgs:rule:flint:zorgtoeslag_art5_p1

The compiled rule is ready to load directly into the ODGS enforcement engine:

from odgs.executive.interceptor import OdgsInterceptor

engine = OdgsInterceptor(rules=[rule])
engine.intercept("urn:odgs:custom:myprocess", {"inkomen": 40000})

What It Does

1. Parses all six FLINT types — flint:Fact, flint:Duty, flint:Act, flint:Source, flint:Reference, flint:Violation from any TNO FLINT source (wetten.overheid.nl, Choppr, EUR-Lex, etc.)
2. Computes semantic_hash — Auto-generates a SHA-256 of the verbatim source payload, logged on every enforcement event — a tamper-evident link from decision back to law.
3. Extracts rule lifecycle — flint:Duty payloads with a flint:period produce effective_from/effective_to bounds, enforced by the ODGS engine.
4. Type-specific rule shapes — Each FLINT type compiles to the right ODGS severity: HARD_STOP for facts/duties/violations, ACT_CONSTRAINT for acts, METADATA_ONLY for sources, LOG_ONLY for references.
5. Human-readable audit fields — plain_english_description (from flint:description) and non_conformance_message (from flint:salvageClause) surface directly in S-Cert audit logs.

The Architecture

flowchart LR
    subgraph legislative["⚖️ Legislative Plane"]
        A["wetten.overheid.nl\nChoppr / TNO FLINT Tools"]
        B["FLINT JSON-LD\nflint:Fact · flint:Duty · flint:Act\nflint:Source · flint:Reference · flint:Violation"]
        A --> B
    end

    subgraph bridge["🔗 ODGS FLINT Bridge  ← you are here"]
        C["FlintParser\nDeserialise JSON-LD"]
        D["OdgsCompiler\nCompute semantic_hash\nExtract temporal bounds"]
        B --> C --> D
    end

    subgraph engine["⚙️ ODGS Enforcement Engine"]
        E["OdgsInterceptor\npip install odgs"]
        F["S-Cert Audit Log\nevent_id · semantic_hash\npayload_hash · verdict"]
        D --> E --> F
    end

    subgraph exec["🗄️ Live Data Pipeline"]
        G["Databricks"]
        H["Snowflake"]
        I["AI Agent / API"]
        E --> G & H & I
    end

    style legislative fill:#E8F4FD,stroke:#2196F3,color:#000
    style bridge     fill:#FFF3E0,stroke:#FF9800,color:#000
    style engine     fill:#E8F5E9,stroke:#4CAF50,color:#000
    style exec       fill:#F3E5F5,stroke:#9C27B0,color:#000

Enterprise

This package emits rules with semantic_hash: "auto-computed" — the SHA-256 is derived locally from the source payload. For Registry-attested hashing with Ed25519 JWS signing and offline .odgs-bundle packages, see the Metric Provenance Enterprise Platform.

👉 Metric Provenance 3-Pillar Enterprise Suite

Licensed under the Apache License 2.0.