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Several of JSU's workflow modules provide the option to post functions let you define the scope of the module on for some related issues.
For example, instead of copying a field within an issue during a post function, you might choose to copy it to a subtask.

Types of Issue Relations

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The related issue will be found is determined by one of the following Jira concepts:

• Issue Link
  You can define the link type to define which issues exactly will be affected by the operation.
  Since JSU 2.2.0, we introduced the value ANY. The operation will post function action.
  You can define ANY if you want the action to be performed on any linked issues.

• Parent / Sub-Task
  The related issue is either the parent or sub-task of each othersubtask of the origin issue.

• Epic / Issue in Epic
  The other issue is either the epic, related by an epic link, or it is part of an epic. This is only available if you have Jira Software installed.

• JQL
  A JQL query will can be executed used to find the issues , which that will be affected by the post function. You can use some placeholders in the JQL query , which that will be replaced with the current field values of the issue in transition.
  

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  For help with writing the JQL query, see the instructions on JQL Reference. See our JQL Use Cases for some examples.

Issue in Transition

'Issue in Transition' refers to the issue for which a workflow condition is checked, for which a workflow validator is examined, or for which a workflow post function is performed. It is the issue that triggered a workflow condition/validator/post function to be executed.

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