The Graph Schema in Neo4j organizes hierarchy nodes as Company, Pillar, Group, BusinessUnit, VirtualBusinessUnit, and CrossUnit so that organizational structure can be represented explicitly in the graph.

### Graph Schema (Neo4j)

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

**Hierarchy nodes:** Company → Pillar → Group → BusinessUnit → VirtualBusinessUnit, CrossUnit

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

BELONGS_TO: Child → parent in hierarchy

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md