Set of definitional characteristics for a kind of observation or measurement produced or consumed by an orderable health care service. Set of definitional characteristics for a kind of observation or measurement produced or consumed by an orderable health care service. If the element is present, it must have either a @value, an @id, or extensions A code that classifies the general type of observation. Describes what will be observed. Sometimes this is called the observation "name". A unique identifier assigned to this ObservationDefinition artifact. The data types allowed for the value element of the instance observations conforming to this ObservationDefinition. Multiple results allowed for observations conforming to this ObservationDefinition. The method or technique used to perform the observation. The preferred name to be used when reporting the results of observations conforming to this ObservationDefinition. Characteristics for quantitative results of this observation. Multiple ranges of results qualified by different contexts for ordinal or continuous observations conforming to this ObservationDefinition. The set of valid coded results for the observations conforming to this ObservationDefinition. The set of normal coded results for the observations conforming to this ObservationDefinition. The set of abnormal coded results for the observation conforming to this ObservationDefinition. The set of critical coded results for the observation conforming to this ObservationDefinition. Set of definitional characteristics for a kind of observation or measurement produced or consumed by an orderable health care service. Customary unit used to report quantitative results of observations conforming to this ObservationDefinition. SI unit used to report quantitative results of observations conforming to this ObservationDefinition. Factor for converting value expressed with SI unit to value expressed with customary unit. Number of digits after decimal separator when the results of such observations are of type Quantity. Set of definitional characteristics for a kind of observation or measurement produced or consumed by an orderable health care service. The category of interval of values for continuous or ordinal observations conforming to this ObservationDefinition. The low and high values determining the interval. There may be only one of the two. Codes to indicate the health context the range applies to. For example, the normal or therapeutic range. Codes to indicate the target population this reference range applies to. Sex of the population the range applies to. The age at which this reference range is applicable. This is a neonatal age (e.g. number of weeks at term) if the meaning says so. The gestational age to which this reference range is applicable, in the context of pregnancy. Text based condition for which the reference range is valid. Quantity CodeableConcept string boolean integer Range Ratio SampledData time dateTime Period Permitted data type for observation value. If the element is present, it must have either a @value, an @id, or extensions reference range critical range absolute range Codes identifying the category of observation range. If the element is present, it must have either a @value, an @id, or extensions