generic attribute profile (GATT)
The Generic Attributes (GATT) define a hierarchical data structure that is exposed to connected Bluetooth LE devices.
一.UUID
GATT Services
GATT Attribute Types
GATT Characteristic Descriptors
GATT Characteristic Types
更多UUID分配：https://www.bluetooth.com/specifications/assigned-numbers
二.分析
再贴几个例子：
蓝牙 BLE GATT 剖析（二）-- GATT UUID and 举例
原文：http://blog.csdn.net/xiaoxiaopengbo/article/details/51542612
