Open Source Repositories

12 open source projects across two GitHub organizations. Apache 2.0 licensed. No vendor lock-in.

Featured Projects

SDCRM

Reference Model - Apache-2.0

The SDC4 Reference Model specification. The foundation that defines how data is structured, validated, and enriched with semantic meaning.

GitHub Docs

sdcgovernance

Governance Engine - Apache 2.0

W3C standards-based governance advisory engine. XACML decisions, PROV-O provenance, workflow validation, MCP server. Deterministic at machine speed.

GitHub Details

sdcreceipt

Settlement Receipt Verifier - Apache 2.0

Verify and settle VSL Settlement Receipts. Offline verification against published keys with no account and no network; party key setup, trigger signing, and the settle call. Eleven published conformance vectors. MCP server included.

GitHub PyPI

sdcvalidator

Structural Validator - Apache 2.0

SDC4 structural validator. XSD schema compliance, two-tier error classification, CLI tools, XML/JSON conversion. Available on PyPI.

GitHub Details

SDCBench

Domain-Expert Bench - Apache 2.0

Desktop app to diagram a data model by reusing published SDCStudio components and sketching new ones in plain language, then hand a draft to a data modeler. Canvas-first; no reference-model knowledge required.

GitHub Download

SDC_Agents

Ingestion Agents - Apache 2.0

Purpose-scoped agents that turn an existing datastore into validated, signed Governed Data Records and load them where you work: Neo4j, GraphDB, Fuseki, REST, or the filesystem.

GitHub Details

Form2SDCTemplate

Form Converter - Apache 2.0

Turn a PDF or DOCX form into an SDC4 template in the browser. Fields are matched against the public component catalog, so anything already defined is reused rather than rebuilt. No account required.

Not for regulated data. The notebook sends the form to Google's Gemini API: upload blank forms, never completed ones, and keep it away from protected health information, controlled unclassified information and anything under a data use agreement. To stay inside your environment, give the instruction file to a local model.

GitHub Open in Colab

SemanticDataCharter

github.com/SemanticDataCharter

SDC_AgentsSMB

Apache 2.0

SDC4 agents for personal and SMB usage. Ollama LLM integration, no cloud API key needed.

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SDC_Agents_Demo

Apache 2.0

From raw data to validated knowledge graph in 5 minutes. End-to-end demonstration.

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ProvGov

Apache 2.0

Provenance governance library.

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HalvorsenDemo

Apache 2.0, public since October 2026

The business-documents chain, order to payment in eleven beats, every document a Governed Data Record, settled on the Verifiable Settlement Layer with party keys the parties hold.

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sdcreader

Apache 2.0, on PyPI (4.2.0), MCP server

Reads a published model package (schema, JSON-LD, Dublin Core header) for projections to other description formats. The reader the four projections share, and since 4.1.0 an MCP server: find, describe and walk a published model with no account.

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sdc_cdif

Apache 2.0, on PyPI as sdccdif (4.1.0), MCP server

One governed record described in CODATA's Cross-Domain Interoperability Framework, checked with CDIF's own validator. The projections.

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sdc_dcat3_us

Apache 2.0, on PyPI as sdcdcatus (4.1.0), MCP server

The same record as a DCAT-US 3.0 data.json entry, the US federal catalog standard, checked with GSA's schema and Data.gov's validator.

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sdc_dcat3_ap

Apache 2.0, on PyPI as sdcdcatap (4.1.0), MCP server

The same record as a DCAT-AP 3.0.1 catalog, the European application profile, checked with SEMIC's SHACL shapes and the Interoperability Test Bed.

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sdc_healthdcat_ap

Apache 2.0, on PyPI as sdchealthdcatap (4.1.0), MCP server

The same record as a HealthDCAT-AP dataset for the European Health Data Space, every leaf a column of its data dictionary, checked with the profile's own shapes.

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FAIR_Data_Demo

Apache 2.0

Three federal health studies (NHANES, BRFSS, CMS) as seven models on the published component libraries, 84,352 records generated from the real federal rows, and the cross-study audit answered by the store. Clone it and run it.

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Axius-SDC

github.com/Axius-SDC

CordovaOS

Apache 2.0

A fictional nation's entire government: ten domains composed from the published component libraries, 1,460 records (25,000 residents as the full set), zero integration code. Clone it and run it.

GitHub Full Details

sirix

BSD 3-Clause (fork)

SirixDB - bitemporal database system for XML and JSON versioning.

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