dateTimePrecisionSpecifier
A precision qualifier used in interval operator phrases to constrain comparison to a specific date/time granularity. Consists of a dateTimePrecision followed by the keyword of.
Examples
Year precision in includes
"Measurement Period" properly includes year of Encounter.period
Month precision in a before/after phrase
Encounter.period 2 months before day of "Measurement Period"
Day precision in overlaps
Encounter1.period overlaps day of Encounter2.period
EBNF
dateTimePrecisionSpecifier : dateTimePrecision 'of' ;