TLA+ 术语解释及中文翻译

• state 状态
  A state is an assignment of values to variables.
  一个状态就是一组为变量赋值的操作。

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• state function 状态函数
  A state function is an ordinary expression (one with no ${}^{\prime }$ or $\square$) that can contain variables and constants.
  一个状态函数就是一个普通的表达式，包含变量和常量，但不包含 ${}^{\prime }$ 和 $\square$操作符.

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• state predicate 状态谓词
  A state predicate is a Boolean-valued state function：
  一个状态谓词就是值为布尔值的状态函数.

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• step 步骤
  A pair of successive states, is called a step：
  一个步骤就是一对连续的状态

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• action 动作
  An ordinary mathematical formula, except that it contains primed as well as unprimed variables, is called an action. An action is true or false of a step, a step that satisfies the action A is called an A step.
  一个动作是一个普通数学公式，同时包含${}^{\prime }$和非${}^{\prime }$的变量，它表征一个步骤的真假，一个满足公式A的步骤叫做A步骤.

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• behavior 行为
  A behavior is an infinite sequence of states:
  一个状态链就是由一组状态组成的无穷序列。

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• specification 规约
  A TLA+ specification is an abstraction of the system, choosing the variables that represent the system’s state and the granularity of the steps that change those variables’values.
  一个TLA+规约是对系统的抽象，需要合理选择变量代表系统的状态，还需要选择合适粒度的改变这些状态的步骤表征系统。

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