Script Priority is used when querying script assignments, to filter based on the priority assigned to the script associated with the assignment.
Values available depend on options defined in the Priority picklist in Enterprise Tester. For example:
ScriptPriority = High
To find all script assignments in a project called Test in the Script package called "Regression Testing" with a status of Critical, write the following query:
Project = Test AND Package = "Regression Testing" AND ScriptPriority = Critical
=, IN, !=, NOT IN