| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Manganese measurement, urine | Is a | True | Measurement of heavy metal in urine specimen | Inferred relationship | Existential restriction modifier |  | 
| Heavy metal screen on urine | Is a | True | Measurement of heavy metal in urine specimen | Inferred relationship | Existential restriction modifier |  | 
| Cadmium measurement, urine | Is a | True | Measurement of heavy metal in urine specimen | Inferred relationship | Existential restriction modifier |  | 
| Iron measurement, urine | Is a | True | Measurement of heavy metal in urine specimen | Inferred relationship | Existential restriction modifier |  | 
| Lead measurement, quantitative, urine | Is a | True | Measurement of heavy metal in urine specimen | Inferred relationship | Existential restriction modifier |  | 
| Zinc measurement, urine | Is a | True | Measurement of heavy metal in urine specimen | Inferred relationship | Existential restriction modifier |  | 
| Urine nickel level | Is a | True | Measurement of heavy metal in urine specimen | Inferred relationship | Existential restriction modifier |  | 
| Thallium measurement, urine | Is a | True | Measurement of heavy metal in urine specimen | Inferred relationship | Existential restriction modifier |  | 
| Copper measurement, urine | Is a | True | Measurement of heavy metal in urine specimen | Inferred relationship | Existential restriction modifier |  | 
| 24 hour urine nickel output | Is a | False | Measurement of heavy metal in urine specimen | Inferred relationship | Existential restriction modifier |  | 
| Mercury measurement, urine | Is a | True | Measurement of heavy metal in urine specimen | Inferred relationship | Existential restriction modifier |  | 
| Lead screening, urine | Is a | True | Measurement of heavy metal in urine specimen | Inferred relationship | Existential restriction modifier |  | 
| Measurement of gold in urine | Is a | True | Measurement of heavy metal in urine specimen | Inferred relationship | Existential restriction modifier |  | 
| Heavy metal in urine specimen above reference range | Interprets | False | Measurement of heavy metal in urine specimen | Inferred relationship | Existential restriction modifier | 1 | 
| Quantitative measurement of mass concentration of bismuth in urine specimen | Is a | True | Measurement of heavy metal in urine specimen | Inferred relationship | Existential restriction modifier |  | 
| Heavy metal in urine specimen above reference range | Interprets | True | Measurement of heavy metal in urine specimen | Inferred relationship | Existential restriction modifier | 1 |