A record of association or dissociation of a device with a subject (e.g. patient) and/or operator. A record of association or dissociation of a device with a subject (e.g. patient) and/or operator. If the element is present, it must have either a @value, an @id, or extensions Instance identifier. Reference to the device that is being associated. Describes the relationship between the device and subject. Indicates the state of the Device association. The reasons given for the current association status. State of the device’s association (e.g., implanted, attached, on, off, standby, defective). The individual, group of individuals or device that the device is on or associated with. The entity for which the device is being used, benefitting from the device, or which the device is being operated upon, which is usually distinct from the association subject, such as an operator or similar. Current anatomical location of the device in/on subject. Begin and end dates and times for the device association. Active Inactive Entered in Error Unknown A coded concept specifying the state of the device association. If the element is present, it must have either a @value, an @id, or extensions