| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Magnetic metal | Is a | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Ferrous metal | Is a | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Nonmagnetic metal | Is a | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Non-ferrous metal | Is a | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Heavy metal | Is a | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Soft metal | Is a | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Hard metal | Is a | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Light metal | Is a | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Metal groups | Is a | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of selenium compound | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Pontic cast, predominantly base metal | Direct substance | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Pontic, porcelain fused to noble metal | Direct substance | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of lead compound | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of tetraethyl lead | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Metallosis | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Pontic, porcelain fused to high noble metal | Direct substance | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Posteruptive tooth staining caused by metal | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of metal | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of lead acetate | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of inorganic lead compound | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Pontic cast, high noble metal | Direct substance | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of organic lead compound | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Contact dermatitis due to metal | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Pontic cast, noble metal | Direct substance | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of nickel compound | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Contact dermatitis due to jewelry | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Inorganic lead compound causing toxic effect NOS | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Organic lead compound causing toxic effect NOS | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Other lead compound causing toxic effect | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Lead compound causing toxic effect NOS | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Other metals causing toxic effect | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Other metals causing toxic effect OS | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Other metals causing toxic effect NOS | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Metals causing toxic effect NOS | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| [X]Toxic effect of other metals | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Metal pneumoconiosis | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Cerium pneumoconiosis | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Thorium pneumoconiosis | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Wollastonite pneumoconiosis | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Trivalent arsenic compound causing toxic effect | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Pentavalent arsenic compound causing toxic effect | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Welders ague | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of copper salt | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of manganese AND/OR its compounds | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Baritosis | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Stannosis | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of lead dioxide | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Metal fever | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of lead salt | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Brass-founders' fever | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of arsenic AND/OR its compounds | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Organic arsenic poisoning | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning caused by manganese and/or manganese compound | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Metal element | Is a | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Antimony causing toxic effect | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Aluminum intoxication | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Aluminum bone disease | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Aluminum-related osteomalacia | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Aluminum-related fracturing osteodystrophy | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Stibialism | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Bauxite fibrosis of lung | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Antimony pneumoconiosis | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Platinosis | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of chromium | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Aluminosis of lung | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Skin disease caused by arsenic | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Arsenical keratosis | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Malignant neoplasm of skin caused by arsenic | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Arsenic-induced skin pigmentation | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Arsenic-induced rain-drop hypomelanosis | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Skin sign from acute arsenic toxicity | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Poisoning caused by arsenic or its compounds of undetermined intent | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning caused by lead and its compounds and fumes | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning caused by lead compound | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning caused by lead fumes | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning by antimony and its compounds and fumes | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning caused by antimony compound | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning caused by antimony fumes | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning caused by arsenic and its compounds and fumes | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning caused by arsenic compound | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning caused by arsenic fumes | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning caused by copper salt | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning caused by manganese and/or manganese compound | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Self poisoning caused by arsenic and/or arsenic compound | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning by lead, unspecified | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning by lead, NOS | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning by antimony, unspecified | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning by antimony, NOS | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning by arsenic, unspecified | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning by arsenic, NOS | Causative agent | False | Metal (element) | Inferred relationship | Existential restriction modifier |  |