| Outbound Relationships | Type | Target | Active | Characteristic | Refinability | Group | Values | 
| Gastric fluid analysis, free and total acid measurement | Is a | Chemical procedure | false | Inferred relationship | Existential restriction modifier |  |  | 
| Gastric fluid analysis, free and total acid measurement | Is a | Gastrointestinal investigation | false | Inferred relationship | Existential restriction modifier |  |  | 
| Gastric fluid analysis, free and total acid measurement | Method | Investigation - action | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Gastric fluid analysis, free and total acid measurement | Procedure site | Gastrointestinal tract structure | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Gastric fluid analysis, free and total acid measurement | Has intent | Diagnostic intent | false | Inferred relationship | Existential restriction modifier |  |  | 
| Gastric fluid analysis, free and total acid measurement | Has specimen | Gastric fluid specimen | true | Inferred relationship | Existential restriction modifier | 2 |  | 
| Gastric fluid analysis, free and total acid measurement | Method | Evaluation - action | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Gastric fluid analysis, free and total acid measurement | Procedure site - Direct | Gastrointestinal tract structure | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Gastric fluid analysis, free and total acid measurement | Procedure site | Gastrointestinal tract structure | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Gastric fluid analysis, free and total acid measurement | Is a | Measurement of substance in specimen | false | Inferred relationship | Existential restriction modifier |  |  | 
| Gastric fluid analysis, free and total acid measurement | Component | Substance | false | Inferred relationship | Existential restriction modifier |  |  | 
| Gastric fluid analysis, free and total acid measurement | Method | Measurement - action | true | Inferred relationship | Existential restriction modifier | 1 |  | 
| Gastric fluid analysis, free and total acid measurement | Method | Evaluation - action | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Gastric fluid analysis, free and total acid measurement | Procedure site | Gastrointestinal tract structure | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Gastric fluid analysis, free and total acid measurement | Is a | Gastric fluid analysis, total acid measurement | true | Inferred relationship | Existential restriction modifier |  |  | 
| Gastric fluid analysis, free and total acid measurement | Component | Acid | true | Inferred relationship | Existential restriction modifier | 3 |  |