Cards

• Glossary
• 1. I work with the UID
• 2. I work with the cardnumber
• 3. I work both with the cardnumber and the UID
• FAQ

• UID: physical ID of a card, the chip number
• Cardnumber: the number associated with the card, often printed on it, or encoded in a barcode
• Empty field: field with null value, "" or "null"
• Our system: our database of cards

1. I set a value (during creation, or if the field was previously empty)
=> The cardnumber is filled automatically if the card is known in our system
If the card is not known, the cardnumber value does not change


2. I change the value (there was a previous value, I set a new one)
=> The cardnumber is filled automatically if the card is known in our system
If the card is not known, the cardnumber value does not change


3. I empty the value (there was a previous value, I set it to empty)
=> The cardnumber is emptied

1. I set a value (during creation, or if the field was previously empty)
=> The UID is filled automatically if the card is known in our system
If the card is not known, the UID value does not change


2. I change the value (there was a previous value, I set a new one)
=> The UID is filled automatically if the card is known in our system
If the card is not known, the UID value does not change


3. I empty the value (there was a previous value, I set it to empty)
=> The UID is emptied

1. I set a value, cardnumber or UID (during creation, or if the fields were previously empty)
=> The other field (cardnumber or UID) is filled automatically if the card is known in our system
If the card is not known, the other value stays empty


2. I set or modify the 2 values, cardnumber and UID
=> If the card is not known in our system (neither the UID nor the carndumber), the 2 values defined are used
=> If the UID is known in our system, the cardnumber value will be the one found in our system
=> If the cardnumber is known but not the UID, the UID value will be the one found in our system


I modify one of the two values, and let the other unchanged
=> The previous rule (3.b) applies


I modify one of the 2 values, and empty the other
=> If this value (UID or cardnumber) is not known in our system, it will still be used, but the other field stays empty
=> If this value is known, the other field will take the value found in our system


I empty one of the two values
=> We consider that the card has been disassociated, so the 2 values are emptied


I empty the two values
=> The card is disassociated, the 2 values are emptied

• My account has been set up in "OPEN" mode (accept all cards), does it change something?
This does not change the behavior discribed here


• If I clear the value of the cardnumber, is it saved in the previouscardnumber field?
Yes, each time the value of cardnumber changes, the previous value, if not empty, is saved in previouscardnumber.