The DERIVED_FROM edge connects one CxU to another so that lineage between derived and source context units can be preserved in the graph.

**Key edges:**

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

- DERIVED_FROM: CxU → CxU (lineage)

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

Graph Schema (Neo4j)

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md