Scan It for Jira provides two methods of setting Detecting Rules: System Rules and Custom Rules.
System Rules
System Rules are pre-defined rules provided by app vendor.
Each rule is expressed in Regular Expression.
App Administrators can set whether or not to enable each rule.
Custom Rules
Custom Rules are user-defined rules that App Administrators can define by themselves.
App Administrators can add Custome Rule through the '+' button.
Name: Name of Custorm Rule
Description: Description of Custom Rule
Pattern(RegEx): Regular Expression of Custom Rule
Enter Regular Expression except for the front and back delimiter, slash('/').
You can check if Regular Expression entered is grammatically correct through the "Grammar Check" button.
Use the "Match Test" button to see if the string you entered matches Regular Expression.
Use: Sets whether the rule is enabled.
Also, App Administrators can edit, delete Custom Rule through the button in ‘Actions’.