Trigger provides a pointer to the output of a monitoring program that triggered the execution of this display set. The intervals and points represented in the chronology are referenced in the Time Line Specification which controls what actually appears on the clinician's display screen. Chronologies must be generated by any monitoring program designed to communicate with the SmartDisplay interpreter. Figure 2 illustrates the components of the display set tuple. Parameter specifies which parameter is to be plotted, label specifies a textual annotation for the time line.
Labels are most useful if they bear a direct relationship to the alert message of the trigger.
The interval list describes those times during which the specified parameter should be displayed. The intervals in the interval list are specified with respect to the interval endpoints and other points of the TUP chronology generated by the triggering monitoring program. It can be overridden by the SmartDisplay interpreter if it does not permit the display within the fixed width of the display area of parameter values during times covered by the interval list. Figure 3 diagrams an instance of a time-line specification for the pair of HR and SBP filters described above. Figure 4 diagrams the time-line generated by the example display set tuple.