An ability is an abstraction of a functionality that an application can provide. It is the minimum unit for the system to schedule applications. An application can contain one or more **Ability** instances.
An ability is the abstraction of a functionality that an application can provide. It is the minimum unit for the system to schedule applications. An application can contain one or more **Ability** instances.
The ability framework model has two forms.
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| Bundle description file | The **config.json** file is used to describe the HAP and component information. The component must use a fixed file name.| The **module.json** file is used to describe the HAP and component information. The entry file name can be specified.|
| Component | Four types of components are provided: Page ability (used for UI page display), Service ability (used to provide services), Data ability (used for data sharing), and Form ability (used to provide widgets).| Two types of components are provided: Ability (used for UI page display) and Extension (scenario-based service extension). |
In addition, the following differences are available in the development process:
In addition, the following differences exist in the development process:
* Different ability types
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For details about the two models, see [FA Model Overview](fa-brief.md) and [Stage Model Overview](stage-brief.md).
For details about the two models, see [FA Model Overview](fa-brief.md) and [Stage Model Overview](stage-brief.md).
