Attribute
interface Attribute
The Attribute Protocol allows a device referred to as the server to expose a set of attributes and their associated values to a peer device referred to as the client. These attributes exposed by the server can be discovered, read, and written by a client, and can be indicated and notified by the server.
Each attribute has an attribute type that identifies, by means of a UUID, what the attribute represents so that a client can understand the attributes exposed by a server.