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UCPIS Repository Structure

Project: Universal Cyber-Physical Interoperability Stack (UCPIS)
Version Context: v1.4
Status: Informative / Non-Normative

This document describes the canonical file and folder structure of the UCPIS repository as of version 1.4. It is intended to help readers, reviewers, and contributors understand how architectural, contextual, and orienting materials are organized.

The repository contains architectural and interpretive documentation only. No products, implementations, standards, compliance mechanisms, or enforcement authorities are defined.

Top-Level Structure

The repository is organized into clearly separated directories and files, each serving a distinct interpretive role.

annexes/ — Architectural Elaboration (DEPTH)

Architectural annexes that elaborate and deepen the UCPIS white paper. Annexes expand understanding but do not override the canonical architecture.

  • README.md
    Annex scope, status, and non-normative posture

  • Annex_A_Definitions_Terminology_Taxonomy.md

  • Annex_B_AI_as_Electrical_and_Thermal_Load.md

  • Annex_C_Reference_Architecture_Diagrams.md

  • Annex_D_Threat_Model_and_Resilience.md

  • Annex_E_Standards_Alignment_and_Mapping.md

  • Annex_F_Reference_Implementation_Guidelines.md (Deferred)

  • Annex_G_Governance_Models.md (Deferred)

  • Annex_H_Interoperability_Profiles.md (Deferred)

Status discipline:

  • Annexes A–E are active in v1.4
  • Annexes F–H are authored but intentionally deferred to prevent premature standardization, governance capture, or implementation lock-in

docs/ — Reader Guidance and Interpretation (ENTRY)

Reader-facing documentation that supports correct interpretation and navigation of the UCPIS corpus.

These documents introduce no new architecture and assert no authority.

  • README.md
    Scope and purpose of reader-guidance materials

  • architecture-overview.md
    Concise, explanatory summary of the UCPIS v1.4 architecture
    (derivative; introduces no new architectural content)

  • how-to-read-ucpis.md
    Recommended reading order and interpretation guidance

  • ucpis-at-a-glance.md
    One-page classification of what UCPIS is and is not

  • document-map.md
    Conceptual map of document relationships and reading layers

  • interpretation-notes.md
    Explicit guardrails against common misinterpretations

docs/notes/ — Contextual Rationale (WHY)

Contextual and pre-normative design rationale explaining why architectural choices were made.

Documents in this directory:

  • are not canonical
  • define no scope, interfaces, or requirements
  • preserve architectural intent and decision discipline

Contents:

  • README.md
    Notes posture and non-authoritative status

  • interoperability-origin.md
    Civilizational interoperability motivation and problem framing

  • constrained-hmi-design-note.md
    Design rationale for Constrained Human–Machine Interfaces

  • v1.5-activation-criteria.md
    Discipline document defining when a future version update would be justified
    (does not initiate v1.5 work)

If conflicts arise, the white paper and active annexes take precedence.

white-paper/ — Canonical Architecture (WHAT)

The authoritative architectural definition of UCPIS v1.4.

  • README.md
    Orientation and non-normative posture for the white paper

  • UCPIS_White_Paper_v1.4.md
    Canonical public reference architecture

prompts/ — Generation and Continuity Artifacts

Prompt artifacts used to generate, regenerate, and preserve continuity of UCPIS documentation.

These files are not architectural documents and define no scope, authority, or requirements. They exist solely to support reproducibility, intent preservation, and disciplined evolution.

  • README.md
    Scope and interpretation rules for prompt artifacts

  • UCPIS_White_Paper_Master_Prompt.md
    The canonical public master prompt used to reproduce the UCPIS v1.4 documentation corpus in a consistent, institution-safe manner.

  • UCPIS_v1.5_Upgrade_Knowledge_Transfer_Prompt.md
    A continuity and intent-preservation artifact that records internal posture, guardrails, and activation criteria for any potential future version.

If any conflict arises between prompt artifacts and published documents, the white paper and active annexes always take precedence.

Repository Root Files — Governance, Attribution, and Metadata

  • .gitignore — Repository hygiene configuration
  • ATTRIBUTION.md — Historical authorship and attribution
  • CHANGELOG.md — Versioned documentation changes
  • CITATION.cff — Machine-readable citation metadata
  • DISCLAIMER.md — Legal and practical limitations
  • Governance-Without-Capture.md — Governance posture statement
  • How-to-Cite-UCPIS.md — Human-readable citation guidance
  • LICENSE — Creative Commons Attribution 4.0 (CC BY 4.0)
  • README.md — Repository overview and scope
  • RELEASE_NOTES.md — v1.4 release summary
  • SECURITY.md — Security posture clarification
  • index.md — Canonical public landing page
  • repository-structure.md — This document

Documentation Layers (Structural Logic)

The repository is intentionally structured around separable documentation layers:

  1. WHAT exists — Canonical Architecture

    • white-paper/
    • annexes/Annex_A–E

  2. WHY it exists — Rationale and Intent

    • docs/notes/

  3. DEPTH and ELABORATION

    • annexes/ (including deferred annexes)

  4. READER ORIENTATION

    • index.md
    • docs/
    • README.md files at major semantic boundaries

This separation prevents scope confusion, premature claims, and accidental institutionalization.

Summary

The UCPIS v1.4 repository structure is designed to:

  • preserve architectural clarity,
  • separate canon from context,
  • resist premature standardization or governance,
  • and support long-term public reference.

Each directory boundary is intentional.
Each README establishes scope and authority limits.
Together, they form a durable, interpretable architectural corpus.

End of Repository Structure Document