intervalOperatorPhrase

Interval operator phrases express temporal and interval relationships between two expressions. They cover concurrent-with, includes, included-in, before/after, within, meets, overlaps, starts, and ends relationships.

Examples

Concurrent (same period)

Encounter.period same as "Measurement Period"

Includes (superset relationship)

"Measurement Period" includes Encounter.period

During (subset relationship)

Encounter.period during "Measurement Period"

Before/after with offset

MedicationStart 30 days before start of Encounter.period

Within a distance

Encounter.period within 30 days of start of "Measurement Period"

Meets (adjacent intervals)

Encounter1.period meets before Encounter2.period

Overlaps

Encounter.period overlaps "Measurement Period"

Railroad Diagram

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EBNF

intervalOperatorPhrase
  : ('starts'|'ends'|'occurs')? 'same' dateTimePrecision? (relativeQualifier | 'as') ('start'|'end')?
  | 'properly'? 'includes' dateTimePrecisionSpecifier? ('start'|'end')?
  | ('starts'|'ends'|'occurs')? 'properly'? ('during'|'included in') dateTimePrecisionSpecifier?
  | ('starts'|'ends'|'occurs')? quantityOffset? temporalRelationship dateTimePrecisionSpecifier? ('start'|'end')?
  | ('starts'|'ends'|'occurs')? 'properly'? 'within' quantity 'of' ('start'|'end')?
  | 'meets' ('before'|'after')? dateTimePrecisionSpecifier?
  | 'overlaps' ('before'|'after')? dateTimePrecisionSpecifier?
  | 'starts' dateTimePrecisionSpecifier?
  | 'ends' dateTimePrecisionSpecifier?
  ;

Used In

expression