Attribute Protocol (ATT) 属性协议

router

•An attribute is a discrete value that has associated with it the following three properties: 属性是一个离散值,与之关联的以下三个部分
1.A handle (address) 地址The address of the attribute in the table
2.A type 类型 Tells what the data represents
3.A set of permissions 一系列的权限

•ATT defines the over-the-air protocol for reading, writing, and discovering attributes
译文：ATT为读写、搜索属性而定义无线协议。

•Allows for different permissions to be assigned to attributes, including whether they are readable or writeable, and whether additional security is required for access
译文：为属性，允许分配不同权限，包括是否可读、可写，或者是否需要附加的安全接入

Servers have data, Clients want to use this data
服务端有数据，客户端想要使用这些数据

Servers expose data using attributes
服务端通过属性暴露数据

总结：ATT定义了无线协议，包含读、写、搜索等属性(Attribute)。也就是说，ATT的作用，以属性表示。属性包含三个部分：Handle、Type、Permissions。