User readable description of the credential identifier format type. It shall be up to 1024 characters. For custom types, it is recommended to describe how the octet string is encoded (following the structure in column Authentication Factor Value Encoding of [ISO 16484-5:2014-09 Annex P]).
OptionalextensionA format type supported by the device. A list of supported format types is provided in [ISO 16484-5:2014-09 Annex P]. The BACnet type "CUSTOM" is not used in this specification. Instead device manufacturers can define their own format types.
Contains information about a format type.