What do you mean by validation?How many types of validations are available in PRPC?
1)To validate a property or a page means to check its value against certain rules, and add a message to the property or page if validation fails. An invalid page (a page that has any associated messages) usually cannot be stored into the database.
2)A validate rule is an instance of the Rule-Obj-Validate rule type. These rules test property values, typically immediately after they are submitted on a browser form.