'''In main<br>'''use EAN module by calling<br>1.isValid<br>2.isRegistered<br><br><br>'''a. EAN module<br>'''1. Use "isValid" function to validate EAN input<br>2. Use "Prefix" module to validate EAN and if validation passed, copy each element to valubles<br><br>'''b. Prefix module<br>'''1. Use "load" function to load prefix database<br>2. Use "isRegistered" function to validate area<br>3. Use "minNoDigits" function to define publisher code<br>4. Use "is registered" function (* Different parameter) to validate publisher</nowikibr>