For example, a DeclareTrigger rule can execute an activity each time an instance of Data-Party-Person class is saved with a modified ZIP code (property Data-Party.pyPostalCode). The activity might send an email message to the sales representative whose territory includes the new address. Similarly, a DeclareTrigger rule can implement a form of logging or audit history for a class, recording the date, time, and other facts.
1. Sending emails in each and every places where a new work party might be added, and obviously this approach only can be established as a coding rule.
2. Define a declare trigger rule on the work class, and implement logic which compares current pyWorkParty page group values against old values. This approach could be waste of electricity and not echo at all