CH EMED (R4)
4.0.1  trialuse
This page is part of the CH EMED (R4) (v4.0.1: STU 4) based on FHIR (HL7® FHIR® Standard) R4. This is the current published version. For a full list of available versions, see the Directory of published versions
Active as of 20210407 
Definitions for the chemedratio data type profile.
Guidance on how to interpret the contents of this table can be found here
0. Ratio  
2. Ratio.numerator  
Control  1..? 
Type  Quantity(CH EMED Quantity with Units) 
4. Ratio.denominator  
Control  1..? 
Type  Quantity(CH EMED Quantity with Units) 
Guidance on how to interpret the contents of this table can be found here
0. Ratio  
Definition  A relationship of two Quantity values  expressed as a numerator and a denominator. 
Short  A ratio of two Quantity values  a numerator and a denominator 
Comments  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. 
Control  0..* This element is affected by the following invariants: ele1 
Is Modifier  false 
Invariants  ele1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) rat1: Numerator and denominator SHALL both be present, or both are absent. If both are absent, there SHALL be some extension present ( (numerator.empty() xor denominator.exists()) and (numerator.exists() or extension.exists()) )rat1: Numerator and denominator SHALL both be present, or both are absent. If both are absent, there SHALL be some extension present ((numerator.empty() xor denominator.exists()) and (numerator.exists() or extension.exists())) 
2. Ratio.numerator  
Definition  The comparator is not used on a SimpleQuantity The value of the numerator. 
Short  A fixed quantity (no comparator)Numerator value 
Comments  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. 
Control  10..1 This element is affected by the following invariants: ele1 
Type  Quantity(CH EMED Quantity with Units) 
Is Modifier  false 
Invariants  ele1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) qty3: If a code for the unit is present, the system SHALL also be present ( code.empty() or system.exists() )sqty1: The comparator is not used on a SimpleQuantity ( comparator.empty() ) 
4. Ratio.denominator  
Definition  The comparator is not used on a SimpleQuantity The value of the denominator. 
Short  A fixed quantity (no comparator)Denominator value 
Comments  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. 
Control  10..1 This element is affected by the following invariants: ele1 
Type  Quantity(CH EMED Quantity with Units) 
Is Modifier  false 
Invariants  ele1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) qty3: If a code for the unit is present, the system SHALL also be present ( code.empty() or system.exists() )sqty1: The comparator is not used on a SimpleQuantity ( comparator.empty() ) 
Guidance on how to interpret the contents of this table can be found here
0. Ratio  
Definition  A relationship of two Quantity values  expressed as a numerator and a denominator. 
Short  A ratio of two Quantity values  a numerator and a denominator 
Comments  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. 
Control  0..* This element is affected by the following invariants: ele1 
Is Modifier  false 
Invariants  ele1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()) )rat1: Numerator and denominator SHALL both be present, or both are absent. If both are absent, there SHALL be some extension present ( (numerator.empty() xor denominator.exists()) and (numerator.exists() or extension.exists()) ) 
2. Ratio.id  
Definition  Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. 
Short  Unique id for interelement referencing 
Control  0..1 
Type  string 
Is Modifier  false 
XML Format  In the XML format, this property is represented as an attribute. 
Summary  false 
4. Ratio.extension  
Definition  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 manageable, 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. 
Short  Additional content defined by implementations 
Comments  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. 
Control  0..* 
Type  Extension 
Is Modifier  false 
Summary  false 
Alternate Names  extensions, user content 
Invariants  ele1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()) )ext1: Must have either extensions or value[x], not both ( extension.exists() != value.exists() ) 
Slicing  This element introduces a set of slices on Ratio.extension . The slices are unordered and Open, and can be differentiated using the following discriminators:

6. Ratio.numerator  
Definition  The comparator is not used on a SimpleQuantity 
Short  A fixed quantity (no comparator) 
Comments  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. 
Control  1..1 This element is affected by the following invariants: ele1 
Type  Quantity(CH EMED Quantity with Units) 
Is Modifier  false 
Invariants  ele1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()) )qty3: If a code for the unit is present, the system SHALL also be present ( code.empty() or system.exists() )sqty1: The comparator is not used on a SimpleQuantity ( comparator.empty() ) 
8. Ratio.denominator  
Definition  The comparator is not used on a SimpleQuantity 
Short  A fixed quantity (no comparator) 
Comments  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. 
Control  1..1 This element is affected by the following invariants: ele1 
Type  Quantity(CH EMED Quantity with Units) 
Is Modifier  false 
Invariants  ele1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()) )qty3: If a code for the unit is present, the system SHALL also be present ( code.empty() or system.exists() )sqty1: The comparator is not used on a SimpleQuantity ( comparator.empty() ) 