# ability.h<a name="ZH-CN_TOPIC_0000001055198088"></a>

-   [Overview](#section712255812165625)
-   [Summary](#section1978620078165625)
-   [Data Structures](#nested-classes)

## **Overview**<a name="section712255812165625"></a>

**Related Modules:**

[AbilityKit](AbilityKit.md)

**Description:**

Declares ability-related functions, including ability lifecycle callbacks and functions for connecting to or disconnecting from Particle Abilities. 

As the fundamental unit of OpenHarmony applications, abilities are classified into  [Feature](Feature.md)  Abilities and Particle Abilities.  [Feature](Feature.md)  Abilities support the Page template, and Particle Abilities support the  [Service](Service.md)  template. An ability using the Page template is called Page ability for short and that using the  [Service](Service.md)  template is called  [Service](Service.md)  ability.

**Since:**

1.0

**Version:**

1.0

## **Summary**<a name="section1978620078165625"></a>

## Data Structures<a name="nested-classes"></a>

<a name="table1422122255165625"></a>
<table><thead align="left"><tr id="row1870566544165625"><th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.1"><p id="p1844990802165625"><a name="p1844990802165625"></a><a name="p1844990802165625"></a>Data Structure Name</p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.2"><p id="p843193539165625"><a name="p843193539165625"></a><a name="p843193539165625"></a>Description</p>
</th>
</tr>
</thead>
<tbody><tr id="row149504607165625"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1255725753165625"><a name="p1255725753165625"></a><a name="p1255725753165625"></a><a href="OHOS-Ability.md">OHOS::Ability</a></p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p305782237165625"><a name="p305782237165625"></a><a name="p305782237165625"></a>Declares ability-related functions, including ability lifecycle callbacks and functions for connecting to or disconnecting from Particle Abilities. </p>
</td>
</tr>
</tbody>
</table>