# Implementation Phases

## Phase 1 - Research and reduction

- study PiCo documentation and article material
- identify the smallest reusable semantic hubs for GLAM custodians
- decide what stays conceptual and what remains engineering-only

## Phase 2 - Parsimonious LinkML scaffolding

- create the package structure
- create package metadata and root schema
- define the first small set of classes and slots

## Phase 3 - Bridge to engineering ontology

- create explicit mapping modules
- document downward realization from hypernyms to engineering classes/slots/enums
- verify external ontology mappings against `data/ontology/`

## Phase 4 - Rule revisions

- edit or extend the relevant LinkML rules
- document which rules are shared across both ontology layers
- document which rules are engineering-only and which become dual-layer

## Phase 5 - Dashboard rollout

- enable `/parsimony`
- verify manifests, routing, and UML rendering
- surface the package even before full ontology completion

## Phase 6 - Iterative population

- add the final limited class set
- add the slot budget in a controlled way
- resist ontology growth unless justified in the mapping docs