Background: See the commenters description: The Documentation attempts to provide a human readable description of the requirement in contrast to the formal definitions. The friendlier term "a time indicating when the measurement was taken" was used instead of  "clinically relevant time" which is a HL7 specific term and not widely understood. Reasoning: We agree that this term does not reflect that it is typically the time of specimen collection and will update it to reflect that and reference the HL7 FHIR term "effective" time. Proposed Changes: Change from: Each DiagnosticReport must have: ... ... ... ... a time indicating when the measurement was taken* ... *These elements have the following constraints: SHALL be present if status is ‘partial’, ‘preliminary’, ‘final’, ‘amended’, ‘corrected’ or ‘appended’. to: Each DiagnosticReport must have: ... ... ... ... the diagnostically relevant time*  (known as the "effective time" and typically the time of specimen collection) ... *These elements have the following constraints: SHALL be present if status is ‘partial’, ‘preliminary’, ‘final’, ‘amended’, ‘corrected’ or ‘appended’.