3. The method of claim 1 , wherein the PII type definitions include, for each of a plurality of payment cards having a corresponding payment card number that conforms to a payment card number format, a card number template having data determining a match of content to the payment card number format.
3. The method of claim 1 , wherein the PII type definitions include, for each of a plurality of payment cards having a corresponding payment card number that conforms to a payment card number format, a card number template having data determining a match of content to the payment card number format. 4. The method of claim 3 , wherein each card number template comprises: length data defining a length of the card number; and subset data defining a sequence of numbers that is less than the length of the card number and that is included in the credit card number.