InfoPath Dev

Is it easier to pass data between views in the same form or pass data between two separate forms?

What is the syntax/process to auto-populate fields after a drop-down is selected (including populating fields in different views or forms, depending on the answer to the first question)?

Thanks.

Multiple views is standard best practice since they share the same data.  Passing data between seperate forms is much more complex.

 Add rules to your drop down to set the value of additional fields.