Industrial automation systems and integration—Process specification language—Part 13:Duration and ordering theories
IDT ISO 18629-13:2006
全国自动化系统与集成标准化技术委员会(SAC/TC 159)
GB/T 20719的本部分提供了与活动的次序和周期约束相关的基本概念的表述，其范围如下：
——子活动发生次序；
——周期；
——迭代发生次序；
——发生树自同态；
——活动包络。
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