A physical, countable instance of an item, for example one box or one unit.

The quantity or amount of instances. For example if several units are being counted for inventory, this quantity can be more than one, provided they are not unique. Seriallized items are considered unique and as such would have a quantity max 1. This element is required and its presence asserts that the reource refers to a physical item.

The location where the item is phisically located.

The patient that the item is associated with (implanted in, given to).

The manufacture or preparation date and time. Times are necessary for several examples - for example biologically derived products, prepared or coumpounded medication, rapidly decaying isotopes.

The expiry or preparation date and time.

The Software version associated with the device, typically only used for devices with embedded software or firmware.

The lot or batch number.

The serial number if available.

The machine-readable AIDC string in base64 encoding. Can correspond to the UDI pattern in devices.

The human-readable barcode string. Can correspond to the UDI pattern in devices.