The pre-defined trigger templates that ship with PowerDesigner indicate naming conventions for the trigger scripts that it generates. The naming convention consists of a prefix indicating the trigger type followed by the table code.
The default naming conventions include a variable (%L:TABLE). The name of the resulting trigger script replaces this variable with a lower-case table code. For example, a resulting trigger script may have the name ti_employee.
You can change the trigger naming convention in PowerDesigner pre-defined DBMS trigger templates from the Trigger Templates tab of the DBMS property sheet.