采用ISO/IEC 15909-1:2004，其中规定并定义了Petri网技术，包括其语法和语义。它提供了一个可在组织内部和组织之间使用的参考定义，以确保对技术和使用该技术编写的规范有一个共同的理解。

Adopts ISO/IEC 15909-1:2004 which specifies and defines a Petri net techniques, including its syntax and semantics. It provides a reference definition that can be used both within and between organisations, to ensure a common understanding of the techniques and of the specifications written using the technique.