# Reference Projects: GitHub Data Standards

Here are three categories of open-source projects on GitHub that offer excellent parallels to a comprehensive standard like the Unified Entity Identifier and Provenance (UEI-P) Standard, particularly concerning common data schemas, multi-language support, and provenance tracking.

## 1. Interoperability & Event Specifications (Cross-Platform)

These standards focus on defining a common data format to ensure different systems and languages can communicate seamlessly. They often define schemas (like UEI-P's Identifier component) and transport rules.

### CloudEvents Specification

What it is: A specification for describing event data in a common way. It is designed to dramatically simplify event declaration and delivery across services, platforms, and languages (Go, Java, Python, C#, etc.).

Parallel: Excellent example of a cross-platform specification managed openly on GitHub. It defines a mandatory set of attributes (like a base entity identifier) that must be present in every data payload.

Link: https://github.com/cloudevents/spec

### CDEvents Specification

What it is: A common specification for Continuous Delivery events, extending CloudEvents by introducing purpose and semantics to the event data.

Parallel: Shows how a standard is built on top of another standard (CloudEvents), specializing the common metadata for a specific domain (CI/CD provenance and flow).

Link: https://github.com/cdevents/spec

## 2. Provenance and Data Tracking Standards

These projects directly relate to the Provenance part of the UEI-P, focusing on tracking the history, inputs, and derivation of data.

### PROV-CPL (Core Provenance Library)

What it is: A Core Provenance Library for collecting data provenance with multiple language bindings (C/C++, Java, Python, R). It uses the W3C PROV standard as its foundation.

Parallel: Demonstrates a multi-language implementation of a provenance standard, providing APIs to record who/what/when/where data was created, which is central to provenance.

Link: https://github.com/ProvTools/prov-cpl

## 3. General Data Schemas and Monorepo Structure

These focus on using JSON Schema to define strict data structures and managing them in a versioned repository.

### JSON Schema Specification

What it is: The official specification for JSON Schema, which is a declarative language used to annotate and validate JSON documents.

Parallel: This is the foundational tool used by many standards (including CloudEvents) to define the specific fields and types (like a UEI-P structure). Looking through this repo shows how a core schema standard is defined and versioned.

Link: https://github.com/json-schema-org/json-schema-spec

### Consumer Data Standards (Australian DSB Schemas)

What it is: A repository holding a collection of JSON schema files derived from the Australian Consumer Data Standards, used for robust schema validation in banking and energy sectors.

Parallel: A great practical example of a large-scale data standard implementation in a monorepo (single repository), organized by release version, providing strict, enforceable JSON schemas for real-world data exchange.

Link: https://github.com/ConsumerDataStandardsAustralia/dsb-schema-tools