BPMN2.0 Process, Choreography, and Collaboration

BPMN2.0文档中定义中三种类型的图，Process, Choreography 和 Collaboration 。

Collaboration

一个 Collaboration 图中通常包含两个或者更多的泳池（Pool），各个 Pool 之间使用 Message 连接 。

Process

1. Private Non-executable (internal) Business Processes
2. Private Executable (internal) Business Processes
3. Public Processes

Choreography

a Choreography does not exist in a single Pool