Provides a reason why the expected value or elements in the element that is extended are missing.

The registered place of birth of the patient. A sytem may use the address.text if they don't store the birthPlace address in discrete elements.

Record details about the anatomical location of a specimen or body part. This resource may be used when a coded concept does not provide the necessary detail needed for the use case.

Provides a rendered version of the value intended for human display.  For example, a sensitive identifier (e.g. social security number) partially obscured by asterisks; a drivers licence number with dashes inserted; a date formatted as MMM dd, yyyy; etc.

The absolute geographic location of the Location, expressed using the WGS84 datum (This is the same co-ordinate system used in KML).

Language translation from base language of resource to another language.

An IANA timezone code for the timezone offset per BCP 175. The offset is specified as part of a dateTime/instant (or using the tzOffset extension on a date if necessary). The timezone code may also be provided to allow for human display of the location associated with the offset.

Timezone offset, for dates where timezone is not allowed as part of the base date.

Specifies that a date is relative to some event. The event happens [Duration] after [Event].

The Human Language of the item.