规范层次结构的基部是通用访问配置文件(GAP)，定义了一系列实现在不同设备间建立基带连接的方法。

At the base of the profile hierarchy is the generic access profile (GAP), which defines a consistent means to establish a baseband link between Bluetooth devices.

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EGL包含一定层次的说明性规范，帮助减少重复且容易出错的编码。

EGL includes a certain level of declarative specifications to help reduce repetitive and error-prone coding.

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每一个对象都拥有在规范模块中可以找到的层次。

Each object has a level where it can be found in the formal module.

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