The `BELONGS_TO` edge connects a child node to its parent in the hierarchy so that hierarchical structure is represented explicitly in the graph.

- BELONGS_TO: Child → parent in hierarchy

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

Child → parent in hierarchy

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

**Key edges:**

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md