dateTimeComponent
A keyword used with the from operator to extract a specific component from a date/time value. Includes all dateTimePrecision values plus date, time, timezoneoffset, and the deprecated timezone.
Examples
Extract year component
year from Patient.birthDate
Extract date part
date from Encounter.period.start
Extract time part
time from Encounter.period.start
Extract timezone offset
timezoneoffset from Encounter.period.start
EBNF
dateTimeComponent : dateTimePrecision | 'date' | 'time' | 'timezoneoffset' | 'timezone' ;