# Relation Types

## Structural
- `develops` — person → project
- `uses` / `used-by` — project ↔ tool/concept
- `part-of` / `contains` — hierarchical
- `depends-on` — dependency

## Temporal
- `decided-on` — choice made (with date)
- `supersedes` — newer replaces older
- `preceded-by` / `followed-by` — sequence

## Qualitative
- `prefers` — user preference
- `avoids` — user anti-preference
- `confident-about` / `uncertain-about` — epistemic
- `relates-to` — general association