Generated Narrative: StructureDefinition ch-emed-epr-time-quantity Name Flags Card. Type Description & Constraints Quantity CHCoreQuantityWithEmedUnits #xD; id D 0..1 string ✕ This element is not supported #xD; extension D 0..* Extension ✕ This element is not supported #xD; value <a style="padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold; color: #301212; background-color: #fdf4f4;; padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold; color: #301212; background-color: #fdf4f4;" href="http://hl7.org/fhir/R4/conformance-rules.html#constraints" title="This element has or is affected by constraints ( time-quantity-strict-positive, time-quantity-only-integer )">C 1..1 decimal Numerical value (with implicit precision) Constraints: time-quantity-strict-positive, time-quantity-only-integer #xD; comparator 0..0 code < | <= | >= | > - how to understand the value #xD; system 1..1 uri System that defines coded unit form Required Pattern: http://unitsofmeasure.org #xD; code 1..1 code Coded form of the unit Binding: Time Quantity Unit Codes (required) #xD; Documentation for this format
A quantity with a time unit (a duration)
The comparator is not used on a SimpleQuantity
The context of use may frequently define what kind of quantity this is and therefore what kind of units can be used. The context of use may also restrict the values for the comparator.
All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
If a code for the unit is present, the system SHALL also be present
PQ, IVL<PQ>, MO, CO, depending on the values
Implementers should not set or read this element. This element is only kept as optional to allow submission of documents that would contain a value, since those documents are still readable by others. The meaning of this element is undefined in this profile.
Extensions are always sliced by (at least) url
Must have either extensions or value[x], not both
exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")])
Numerical value (with implicit precision)
The value of the measured amount. The value includes an implicit precision in the presentation of the value.
The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).
Precision is handled implicitly in almost all cases of measurement.
A time quantity shall have a strictly positive value
A time quantity shall only have an integer value
PQ.value, CO.value, MO.value, IVL.high or IVL.low depending on the value
< | <= | >= | > - how to understand the value
...All modifiers SHALL be documented in the profile, in order to be usable.
Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.
If there is no comparator, then there is no modification of the value
This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value
How the Quantity should be understood and represented.
There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms.
The identification of the system that provides the coded form of the unit.
Need to know the system that defines the coded form of the unit.
CO.codeSystem, PQ.translation.codeSystem
A computer processable form of the unit in some unit representation system.
The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest.
PQ.code, MO.currency, PQ.translation.code