Part 3 — Building the Concept Graph

The SNOMED CT ontology forms a large directed graph where nodes represent medical concepts and edges represent semantic relationships. To build embeddings, we must represent this structure explicitly.

Core Graph Components

Nodes: Active conceptId entries.
Edges: Relationships from the relationship table, including both hierarchical (is-a) and attribute-based links.
Weights: Optional weighting by relationship type or frequency to refine semantic proximity.

The graph can be built with networkx or stored in a graph database for large-scale use. The resulting structure becomes the foundation for node embeddings.