Generated Narrative: StructureDefinition emaRatio

NameFlagsCard.TypeDescription & Constraintsdoco
.. Ratio 0..*RatioA ratio of two Quantity values - a numerator and a denominator
... numerator 1..1QuantityNumerator value
Binding: Unit of Measurement (required)
.... extension 1..1CodingThe Comparator Extension
URL: http://ema.europa.eu/fhir/extension/comparator
Binding: Quantity Operator (required)
.... value 1..1decimalNumerical value (with implicit precision)
.... comparator 1..1code< | <= | >= | > | ad - how to understand the value
.... unit 1..1stringUnit representation
... denominator 1..1SimpleQuantity(5.0.0)Denominator value
Binding: Units of Presentation (required)
.... value 1..1decimalNumerical value (with implicit precision)
.... unit 1..1stringUnit representation

doco Documentation for this format
 <status value="draft"/> <date value="2026-06-26T11:31:08+01:00"/> <publisher value="EMA"/> <contact> <name value="EMA"/> <telecom> <system value="url"/> <value value="https://support.ema.europa.eu/esc"/> </telecom> </contact> <description value="EMA Ratio"/> <fhirVersion value="5.0.0"/> <mapping> <identity value="v2"/> <uri value="http://hl7.org/v2"/> <name value="HL7 V2 Mapping"/> </mapping> <mapping> <identity value="rim"/> <uri value="http://hl7.org/v3"/> <name value="RIM Mapping"/> </mapping> <kind value="complex-type"/> <abstract value="false"/> <type value="Ratio"/> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Ratio"/> <derivation value="constraint"/> <snapshot> <extension url="http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version"> <valueString value="5.0.0"/> </extension> <element id="Ratio"> <path value="Ratio"/> <short value="A ratio of two Quantity values - a numerator and a denominator"/> <definition value="A relationship of two Quantity values - expressed as a numerator and a denominator."/> <comment value="The Ratio datatype should only be used to express a relationship of two numbers if the relationship cannot be suitably expressed using a Quantity and a common unit. Where the denominator value is known to be fixed to "1", Quantity should be used instead of Ratio."/> <min value="0"/> <max value="*"/> <base> <path value="Ratio"/> <min value="0"/> <max value="*"/> </base> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <constraint> <key value="rat-1"/> <severity value="error"/> <human value="Numerator and denominator SHALL both be present, or both are absent. If both are absent, there SHALL be some extension present"/> <expression value="(numerator.exists() and denominator.exists()) or (numerator.empty() and denominator.empty() and extension.exists())"/> <source value="http://hl7.org/fhir/StructureDefinition/Ratio"/> </constraint> <isModifier value="false"/> <mapping> <identity value="rim"/> <map value="n/a,RTO"/> </mapping> <mapping> <identity value="v2"/> <map value="N/A"/> </mapping> </element> <element id="Ratio.id"> <path value="Ratio.id"/> <representation value="xmlAttr"/> <short value="Unique id for inter-element referencing"/> <definition value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/> <min value="0"/> <max value="1"/> <base> <path value="Element.id"/> <min value="0"/> <max value="1"/> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="id"/> </extension> <code value="http://hl7.org/fhirpath/System.String"/> </type> <condition value="ele-1"/> <isModifier value="false"/> <isSummary value="false"/> <mapping> <identity value="rim"/> <map value="n/a"/> </mapping> </element> <element id="Ratio.extension"> <path value="Ratio.extension"/> <slicing> <discriminator> <type value="value"/> <path value="url"/> </discriminator> <description value="Extensions are always sliced by (at least) url"/> <rules value="open"/> </slicing> <short value="Additional content defined by implementations"/> <definition value="May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/> <comment value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/> <alias value="extensions"/> <alias value="user content"/> <min value="0"/> <max value="*"/> <base> <path value="Element.extension"/> <min value="0"/> <max value="*"/> </base> <type> <code value="Extension"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <constraint> <key value="ext-1"/> <severity value="error"/> <human value="Must have either extensions or value[x], not both"/> <expression value="extension.exists() != value.exists()"/> <source value="http://hl7.org/fhir/StructureDefinition/Extension"/> </constraint> <isModifier value="false"/> <isSummary value="false"/> <mapping> <identity value="rim"/> <map value="n/a"/> </mapping> </element> <element id="Ratio.numerator"> <path value="Ratio.numerator"/> <short value="Numerator value"/> <definition value="The value of the numerator."/> <min value="1"/> <max value="1"/> <base> <path value="Ratio.numerator"/> <min value="0"/> <max value="1"/> </base> <type> <code value="Quantity"/> </type> <condition value="rat-1"/> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="true"/> <binding> <strength value="required"/> <valueSet value="http://ema.europa.eu/fhir/vs/unitsOfMeasurementVs"/> </binding> <mapping> <identity value="rim"/> <map value=".numerator"/> </mapping> </element> <element id="Ratio.numerator.id"> <path value="Ratio.numerator.id"/> <representation value="xmlAttr"/> <short value="Unique id for inter-element referencing"/> <definition value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/> <min value="0"/> <max value="1"/> <base> <path value="Element.id"/> <min value="0"/> <max value="1"/> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="id"/> </extension> <code value="http://hl7.org/fhirpath/System.String"/> </type> <condition value="ele-1"/> <isModifier value="false"/> <isSummary value="false"/> <mapping> <identity value="rim"/> <map value="n/a"/> </mapping> </element> <element id="Ratio.numerator.extension"> <path value="Ratio.numerator.extension"/> <slicing> <discriminator> <type value="value"/> <path value="url"/> </discriminator> <description value="Extensions are always sliced by (at least) url"/> <rules value="open"/> </slicing> <short value="The Comparator Extension"/> <definition value="The Comparator Extension"/> <min value="1"/> <max value="1"/> <base> <path value="Element.extension"/> <min value="0"/> <max value="*"/> </base> <type> <code value="Extension"/> <profile value="http://ema.europa.eu/fhir/extension/comparator"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <constraint> <key value="ext-1"/> <severity value="error"/> <human value="Must have either extensions or value[x], not both"/> <expression value="extension.exists() != value.exists()"/> <source value="http://hl7.org/fhir/StructureDefinition/Extension"/> </constraint> <isModifier value="false"/> <isSummary value="false"/> </element> <element id="Ratio.numerator.value"> <path value="Ratio.numerator.value"/> <short value="Numerical value (with implicit precision)"/> <definition value="The value of the measured amount. The value includes an implicit precision in the presentation of the value."/> <comment 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)."/> <requirements value="Precision is handled implicitly in almost all cases of measurement."/> <min value="1"/> <max value="1"/> <base> <path value="Quantity.value"/> <min value="0"/> <max value="1"/> </base> <type> <code value="decimal"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="true"/> <mapping> <identity value="v2"/> <map value="SN.2 / CQ - N/A"/> </mapping> <mapping> <identity value="rim"/> <map value="PQ.value, CO.value, MO.value, IVL.high or IVL.low depending on the value"/> </mapping> </element> <element id="Ratio.numerator.comparator"> <path value="Ratio.numerator.comparator"/> <short value="< | <= | >= | > | ad - how to understand the value"/> <definition value="How the value should be understood and represented - whether the actual value is greater or less than the stated value due to measurement issues; e.g. if the comparator is "<" , then the real value is < stated value."/> <requirements value="Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology."/> <min value="1"/> <max value="1"/> <base> <path value="Quantity.comparator"/> <min value="0"/> <max value="1"/> </base> <type> <code value="code"/> </type> <meaningWhenMissing value="If there is no comparator, then there is no modification of the value"/> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="true"/> <isModifierReason 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"/> <isSummary value="true"/> <binding> <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName"> <valueString value="QuantityComparator"/> </extension> <strength value="required"/> <description value="How the Quantity should be understood and represented."/> <valueSet value="http://hl7.org/fhir/ValueSet/quantity-comparator|5.0.0"/> </binding> <mapping> <identity value="v2"/> <map value="SN.1 / CQ.1"/> </mapping> <mapping> <identity value="rim"/> <map value="IVL properties"/> </mapping> </element> <element id="Ratio.numerator.unit"> <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable"> <valueBoolean value="true"/> </extension> <path value="Ratio.numerator.unit"/> <short value="Unit representation"/> <definition value="A human-readable form of the unit."/> <requirements value="There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms."/> <min value="1"/> <max value="1"/> <base> <path value="Quantity.unit"/> <min value="0"/> <max value="1"/> </base> <type> <code value="string"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="true"/> <mapping> <identity value="v2"/> <map value="(see OBX.6 etc.) / CQ.2"/> </mapping> <mapping> <identity value="rim"/> <map value="PQ.unit"/> </mapping> </element> <element id="Ratio.numerator.system"> <path value="Ratio.numerator.system"/> <short value="System that defines coded unit form"/> <definition value="The identification of the system that provides the coded form of the unit."/> <requirements value="Need to know the system that defines the coded form of the unit."/> <min value="0"/> <max value="1"/> <base> <path value="Quantity.system"/> <min value="0"/> <max value="1"/> </base> <type> <code value="uri"/> </type> <condition value="qty-3"/> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="true"/> <mapping> <identity value="v2"/> <map value="(see OBX.6 etc.) / CQ.2"/> </mapping> <mapping> <identity value="rim"/> <map value="CO.codeSystem, PQ.translation.codeSystem"/> </mapping> </element> <element id="Ratio.numerator.code"> <path value="Ratio.numerator.code"/> <short value="Coded form of the unit"/> <definition value="A computer processable form of the unit in some unit representation system."/> <comment value="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."/> <requirements value="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."/> <min value="0"/> <max value="1"/> <base> <path value="Quantity.code"/> <min value="0"/> <max value="1"/> </base> <type> <code value="code"/> </type> <condition value="qty-3"/> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="true"/> <mapping> <identity value="v2"/> <map value="(see OBX.6 etc.) / CQ.2"/> </mapping> <mapping> <identity value="rim"/> <map value="PQ.code, MO.currency, PQ.translation.code"/> </mapping> </element> <element id="Ratio.denominator"> <path value="Ratio.denominator"/> <short value="Denominator value"/> <definition value="The value of the denominator."/> <min value="1"/> <max value="1"/> <base> <path value="Ratio.denominator"/> <min value="0"/> <max value="1"/> </base> <type> <code value="Quantity"/> <profile value="http://hl7.org/fhir/StructureDefinition/SimpleQuantity|5.0.0"/> </type> <condition value="rat-1"/> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="true"/> <binding> <strength value="required"/> <valueSet value="http://ema.europa.eu/fhir/vs/unitsOfPresentation"/> </binding> <mapping> <identity value="rim"/> <map value=".denominator"/> </mapping> </element> <element id="Ratio.denominator.id"> <path value="Ratio.denominator.id"/> <representation value="xmlAttr"/> <short value="Unique id for inter-element referencing"/> <definition value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/> <min value="0"/> <max value="1"/> <base> <path value="Element.id"/> <min value="0"/> <max value="1"/> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="id"/> </extension> <code value="http://hl7.org/fhirpath/System.String"/> </type> <condition value="ele-1"/> <isModifier value="false"/> <isSummary value="false"/> <mapping> <identity value="rim"/> <map value="n/a"/> </mapping> </element> <element id="Ratio.denominator.extension"> <path value="Ratio.denominator.extension"/> <slicing> <discriminator> <type value="value"/> <path value="url"/> </discriminator> <description value="Extensions are always sliced by (at least) url"/> <rules value="open"/> </slicing> <short value="Additional content defined by implementations"/> <definition value="May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/> <comment value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/> <alias value="extensions"/> <alias value="user content"/> <min value="0"/> <max value="*"/> <base> <path value="Element.extension"/> <min value="0"/> <max value="*"/> </base> <type> <code value="Extension"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <constraint> <key value="ext-1"/> <severity value="error"/> <human value="Must have either extensions or value[x], not both"/> <expression value="extension.exists() != value.exists()"/> <source value="http://hl7.org/fhir/StructureDefinition/Extension"/> </constraint> <isModifier value="false"/> <isSummary value="false"/> <mapping> <identity value="rim"/> <map value="n/a"/> </mapping> </element> <element id="Ratio.denominator.value"> <path value="Ratio.denominator.value"/> <short value="Numerical value (with implicit precision)"/> <definition value="The value of the measured amount. The value includes an implicit precision in the presentation of the value."/> <comment 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)."/> <requirements value="Precision is handled implicitly in almost all cases of measurement."/> <min value="1"/> <max value="1"/> <base> <path value="Quantity.value"/> <min value="0"/> <max value="1"/> </base> <type> <code value="decimal"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="true"/> <mapping> <identity value="v2"/> <map value="SN.2 / CQ - N/A"/> </mapping> <mapping> <identity value="rim"/> <map value="PQ.value, CO.value, MO.value, IVL.high or IVL.low depending on the value"/> </mapping> </element> <element id="Ratio.denominator.comparator"> <path value="Ratio.denominator.comparator"/> <short value="< | <= | >= | > | ad - how to understand the value"/> <definition value="Not allowed to be used in this context"/> <requirements value="Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology."/> <min value="0"/> <max value="0"/> <base> <path value="Quantity.comparator"/> <min value="0"/> <max value="1"/> </base> <type> <code value="code"/> </type> <meaningWhenMissing value="If there is no comparator, then there is no modification of the value"/> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="true"/> <isModifierReason 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"/> <isSummary value="true"/> <binding> <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName"> <valueString value="QuantityComparator"/> </extension> <strength value="required"/> <description value="How the Quantity should be understood and represented."/> <valueSet value="http://hl7.org/fhir/ValueSet/quantity-comparator|5.0.0"/> </binding> <mapping> <identity value="v2"/> <map value="SN.1 / CQ.1"/> </mapping> <mapping> <identity value="rim"/> <map value="IVL properties"/> </mapping> </element> <element id="Ratio.denominator.unit"> <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable"> <valueBoolean value="true"/> </extension> <path value="Ratio.denominator.unit"/> <short value="Unit representation"/> <definition value="A human-readable form of the unit."/> <requirements value="There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms."/> <min value="1"/> <max value="1"/> <base> <path value="Quantity.unit"/> <min value="0"/> <max value="1"/> </base> <type> <code value="string"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="true"/> <mapping> <identity value="v2"/> <map value="(see OBX.6 etc.) / CQ.2"/> </mapping> <mapping> <identity value="rim"/> <map value="PQ.unit"/> </mapping> </element> <element id="Ratio.denominator.system"> <path value="Ratio.denominator.system"/> <short value="System that defines coded unit form"/> <definition value="The identification of the system that provides the coded form of the unit."/> <requirements value="Need to know the system that defines the coded form of the unit."/> <min value="0"/> <max value="1"/> <base> <path value="Quantity.system"/> <min value="0"/> <max value="1"/> </base> <type> <code value="uri"/> </type> <condition value="qty-3"/> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="true"/> <mapping> <identity value="v2"/> <map value="(see OBX.6 etc.) / CQ.2"/> </mapping> <mapping> <identity value="rim"/> <map value="CO.codeSystem, PQ.translation.codeSystem"/> </mapping> </element> <element id="Ratio.denominator.code"> <path value="Ratio.denominator.code"/> <short value="Coded form of the unit"/> <definition value="A computer processable form of the unit in some unit representation system."/> <comment value="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."/> <requirements value="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."/> <min value="0"/> <max value="1"/> <base> <path value="Quantity.code"/> <min value="0"/> <max value="1"/> </base> <type> <code value="code"/> </type> <condition value="qty-3"/> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="true"/> <mapping> <identity value="v2"/> <map value="(see OBX.6 etc.) / CQ.2"/> </mapping> <mapping> <identity value="rim"/> <map value="PQ.code, MO.currency, PQ.translation.code"/> </mapping> </element> </snapshot> <differential> <element id="Ratio"> <path value="Ratio"/> </element> <element id="Ratio.numerator"> <path value="Ratio.numerator"/> <min value="1"/> <binding> <strength value="required"/> <valueSet value="http://ema.europa.eu/fhir/vs/unitsOfMeasurementVs"/> </binding> </element> <element id="Ratio.numerator.extension"> <path value="Ratio.numerator.extension"/> <min value="1"/> <max value="1"/> <type> <code value="Extension"/> <profile value="http://ema.europa.eu/fhir/extension/comparator"/> </type> </element> <element id="Ratio.numerator.value"> <path value="Ratio.numerator.value"/> <min value="1"/> </element> <element id="Ratio.numerator.comparator"> <path value="Ratio.numerator.comparator"/> <min value="1"/> </element> <element id="Ratio.numerator.unit"> <path value="Ratio.numerator.unit"/> <min value="1"/> </element> <element id="Ratio.denominator"> <path value="Ratio.denominator"/> <min value="1"/> <binding> <strength value="required"/> <valueSet value="http://ema.europa.eu/fhir/vs/unitsOfPresentation"/> </binding> </element> <element id="Ratio.denominator.value"> <path value="Ratio.denominator.value"/> <min value="1"/> </element> <element id="Ratio.denominator.unit"> <path value="Ratio.denominator.unit"/> <min value="1"/> </element> </differential> </StructureDefinition>