What's the difference between a school form and a system form in AP3?

If you are using Admission Portal 3.0, there are two types of web forms, system and school.  System forms write directly to the database. You can configure but not compose them.  An example of this would be the citizenship form which collects and adds data to Axiom regarding passports, citizenship(s), etc.  School forms do not write information to the database but you can create and configure them with their own unique fields.  These are most commonly used for student or parent questionnaires.