Figure 2.

Conditional knowledge-based schema of CPMKG. This schema includes foundational elements such as drugs, diseases, phenotypes, genes, and variations. “Drugs” cover pharmacological substances, “diseases” encompass pathological conditions, “variations” refer to differences in the human genome, “phenotypes” include side effects or complications, and “genes” pertain to human genes. This schema illustrates the integration of these entities and their detailed relationships, highlighting the four conditional knowledge patterns in precision medicine.