| Source Element | Usage | Target |
| NutritionIntake | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-NutritionIntake |
| NutritionIntake.id | UseExtensionFromAncestor | - |
| NutritionIntake.meta | UseExtensionFromAncestor | - |
| NutritionIntake.implicitRules | UseExtensionFromAncestor | - |
| NutritionIntake.language | UseExtensionFromAncestor | - |
| NutritionIntake.text | UseExtensionFromAncestor | - |
| NutritionIntake.contained | UseExtensionFromAncestor | - |
| NutritionIntake.extension | UseExtensionFromAncestor | - |
| NutritionIntake.modifierExtension | UseExtensionFromAncestor | - |
| NutritionIntake.identifier | UseExtensionFromAncestor | - |
| NutritionIntake.instantiatesCanonical | UseExtensionFromAncestor | - |
| NutritionIntake.instantiatesUri | UseExtensionFromAncestor | - |
| NutritionIntake.basedOn | UseExtensionFromAncestor | - |
| NutritionIntake.partOf | UseExtensionFromAncestor | - |
| NutritionIntake.status | UseExtensionFromAncestor | - |
| NutritionIntake.statusReason | UseExtensionFromAncestor | - |
| NutritionIntake.code | UseExtensionFromAncestor | - |
| NutritionIntake.subject | UseExtensionFromAncestor | - |
| NutritionIntake.encounter | UseExtensionFromAncestor | - |
| NutritionIntake.occurrence[x] | UseExtensionFromAncestor | - |
| NutritionIntake.recorded | UseExtensionFromAncestor | - |
| NutritionIntake.reported[x] | UseExtensionFromAncestor | - |
| NutritionIntake.consumedItem | UseExtensionFromAncestor | - |
| NutritionIntake.consumedItem.id | UseExtensionFromAncestor | - |
| NutritionIntake.consumedItem.extension | UseExtensionFromAncestor | - |
| NutritionIntake.consumedItem.modifierExtension | UseExtensionFromAncestor | - |
| NutritionIntake.consumedItem.type | UseExtensionFromAncestor | - |
| NutritionIntake.consumedItem.nutritionProduct | UseExtensionFromAncestor | - |
| NutritionIntake.consumedItem.schedule | UseExtensionFromAncestor | - |
| NutritionIntake.consumedItem.amount | UseExtensionFromAncestor | - |
| NutritionIntake.consumedItem.rate | UseExtensionFromAncestor | - |
| NutritionIntake.consumedItem.notConsumed | UseExtensionFromAncestor | - |
| NutritionIntake.consumedItem.notConsumedReason | UseExtensionFromAncestor | - |
| NutritionIntake.ingredientLabel | UseExtensionFromAncestor | - |
| NutritionIntake.ingredientLabel.id | UseExtensionFromAncestor | - |
| NutritionIntake.ingredientLabel.extension | UseExtensionFromAncestor | - |
| NutritionIntake.ingredientLabel.modifierExtension | UseExtensionFromAncestor | - |
| NutritionIntake.ingredientLabel.nutrient | UseExtensionFromAncestor | - |
| NutritionIntake.ingredientLabel.amount | UseExtensionFromAncestor | - |
| NutritionIntake.performer | UseExtensionFromAncestor | - |
| NutritionIntake.performer.id | UseExtensionFromAncestor | - |
| NutritionIntake.performer.extension | UseExtensionFromAncestor | - |
| NutritionIntake.performer.modifierExtension | UseExtensionFromAncestor | - |
| NutritionIntake.performer.function | UseExtensionFromAncestor | - |
| NutritionIntake.performer.actor | UseExtensionFromAncestor | - |
| NutritionIntake.location | UseExtensionFromAncestor | - |
| NutritionIntake.derivedFrom | UseExtensionFromAncestor | - |
| NutritionIntake.reason | UseExtensionFromAncestor | - |
| NutritionIntake.note | UseExtensionFromAncestor | - |