---
type: "operations"
title: "ActivityDefinition Operations"
resource: "ActivityDefinition"
---
# ActivityDefinition Operations

- [apply](/activitydefinition-operation-apply) — Apply — The apply operation applies a definition in a specific context
- [data-requirements](/activitydefinition-operation-data-requirements) — Data Requirements — The data-requirements operation aggregates and returns the parameters and data requirements for the activity definition and all its dependencies as a single module definition library