Matching Pairs Data ValidationOnline version Types of validation by Miss Butler 1 Lookup table 2 Format check 3 Length check 4 Range check 5 Presence check 6 Check digit 7 Spell check the last one or two digits in a code are used to check the other digits are correct checks the data is in the right format checks that a value falls within the specified range looks up acceptable values in a table checks the data isn't too short or too long checks that data has been entered into a field looks up words in a dictionary