Are you a rule follower or a rule breaker? We’ve got both in our office (I won’t mention any names…) but we all agree that Attribute Rules in ArcGIS Pro are the types of rules we can get behind. There are three rule types you can use to help keep your data in check: Calculation, Constraint, and Validation. Today I’m going to give some examples of creating and applying Calculation rules. If you’re an ArcMap user, this will look a lot like using Attribute Assistant, but better.