rule (validation rule)

A condition to evaluate, plus an action to perform when the condition is met (or not met). Normally used to validate field values.

You can:

• Add rules to field specifications or templates (including compound field specifications). These rules only apply to the field you configure in the field specification.

• Add rules to documents and other objects (such as compounds and batches). These rules allow you to establish relations between different fields within the document, compound document, or batch specification.

• Create a rule template.
   

You can also create field rules for invoices, but these have a somewhat different purpose, since they are part of field exceptions.