A card deck. A collection of fields. Defines the appearance of a card field. Foreground color of the field. Format: [a]rgb([0-255],[0-255],[0-255],[0-255]). Background color of the field. Format: [a]rgb([0-255],[0-255],[0-255],[0-255]). A collection of cards. A card. A card field. An integer, 0 or greater, representing the ID of the field. Must be unique and increment by one. Name of a field, must be unique. Type of a field. The side on which the field is shown. The relative position of the field on the card. The learned status of the card. The field associated with this card field.