Agree with comment.  Suggest the following: https://hl7.org/fhir/us/cqfmeasures/measure-conformance.html#conformance-requirement-3-11 : The CQL expression SHALL use a FHIR resource type (e.g. Patient) as the context, and SHALL be expressed within the context of a single subject record of that type. https://hl7.org/fhir/us/cqfmeasures/measure-conformance.html#conformance-requirement-3-13 :  2. The aggregateMethod extension SHALL be used on the measureObservation criteria to indicate the aggregate method for the observations. CQL expressions referenced from measure-observation criteria elements  SHALL be consistent with the context used for the population criteria of the measure.   3. Provide the following new text (in red) to the paragraph directly above conformance 3.9 ( https://hl7.org/fhir/us/cqfmeasures/measure-conformance.html#conformance-requirement-3-9)   In addition, the formula for calculating the measure score is implied by the scoring type of the measure. The following sections describe the expected result type for population criteria for each type of measure, as well as explicitly defining the measure score calculation formula. The context of a measure is indicated using the subject element of the FHIR resource.  The subject element will be a reference to a FHIR resource type, specifically including Patient, Location, Organization, Practitioner, and Device as currently specified in the extensible SubjectType binding.  It is important to note that other resource types may be used, but it must be a FHIR resource type. We should also note that although the discussion is focused on Patient as the subject, the discussion applies to other subject types as well. In addition to the measure scoring type , measures generally fall into two categories, patient-based, and non-patient-based (e.g. encounter-based). In general, patient-based measures count the number of patients in each population, while non-patient-based measures count the number of items (such as encounters) in each population. Although the calculation formulas are conceptually the same for both categories, for ease of expression, population criteria for patient-based measures indicates whether a patient matches the population criteria (true) or not (false). Non-patient-based measures return the item to be counted such as an encounter or procedure. 4. Table 3-1 should have the word SCORING added to blank box above scoring types.   5. Change CQL examples found below to show "context unfiltered" instead of "context population" https://hl7.org/fhir/us/cqfmeasures/measure-conformance.html#non-patient-based-calculation-1   https://hl7.org/fhir/us/cqfmeasures/measure-conformance.html#calculation