它还提供了一个设置默认角色给其他模块定义权限集的功能。
It also provides a set of default roles for which other modules can define permissions.
EXPath 成果主要关注于定义规范，不一定提供 EXPath 模块功能的实现。
The EXPath effort is mainly focused on defining specifications, not necessarily providing implementations of EXPath module functionality.
清单1展示了样板模块功能，定义了模块入口和出口函数。
Listing 1 presents the boilerplate module functions, defining the module entry and exit functions.
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