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Definition of terms: activity, task, job, execution, ...

Question asked by jesper1 on Apr 28, 2016
Latest reply on May 3, 2016 by jbarrez
There are lots of concepts in Activiti, such as: deployments, processes, activities, tasks, jobs and executions.

Unfortunately user manual does not clearly define these terms, and for someone new to Activiti and BPMN it is hard to understand what exactly is what.

Is there a clear description of these terms somewhere? Some of the questions I have are:

    What is an execution?
    What is the difference between an execution and a process instance?
    What is the difference between an activity, a task and a job?