Note: because this type is defined as an extension of SXCM_T, all of the attributes and elements accepted for T are also accepted by this definition. However, they are NOT allowed by the normative description of this type. Unfortunately, we cannot write a general purpose schematron contraints to provide that extra validation, thus applications must be aware that instance (fragments) that pass validation with this might might still not be legal.

If a value is an exceptional value (NULL-value), this specifies in what way and why proper information is missing.

A quantity specifying a point on the axis of natural time. A point in time is most often represented as a calendar expression.

Specifies whether the limit is included in the interval (interval is closed) or excluded from the interval (interval is open).

A code specifying whether the set component is included (union) or excluded (set-difference) from the set, or other set operations with the current set component and the set as constructed from the representation stream up to the current point.

A code for a common (periodical) activity of daily living based on which the event related periodic interval is specified.

An interval of elapsed time (duration, not absolute point in time) that marks the offsets for the beginning, width and end of the event-related periodic interval measured from the time each such event actually occurred.