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Spine Schema — Canonical Semantic Model

Root entities

Organization
Person
Team
Role
Responsibility
Authority
Domain
Goal
Objective
Work
Task
Assignment
Entity
Relationship
Event
Decision
Communication
Evidence
Policy
Capability
Agent
System
Workflow
State
Outcome
Memory
Continuity

Entity requirements

Every canonical entity SHOULD support:

• stable identity;
• tenant;
• provenance;
• lineage;
• source references;
• state;
• timestamps;
• relationships;
• lifecycle;
• sensitivity where relevant.

Relationship model

Relationships encode organizational meaning:

Person → member_of → Team
Person → has_role → Role
Person → responsible_for → Work
Work → concerns → Entity
Work → depends_on → Work
Work → assigned_to → Person
Work → delegated_to → Agent
Work → requires → Capability
Decision → affects → Work
Evidence → supports → Decision
Outcome → updates → Entity

Schema worlds

1. canonical organizational schema;
2. normalized provider schema;
3. operational runtime schema;
4. projection schema;
5. event/message schema.

These must not be conflated.

Schema evolution

• additive changes preferred;
• version contracts;
• preserve provenance;
• migration plans for breaking changes;
• schema changes cannot silently redefine organizational truth.