Estonian Base Implementation Guide
            
            1.0.0 - ballot
  
            
          
Estonian Base Implementation Guide - Local Development build (v1.0.0). See the Directory of published versions
| Draft as of 2023-05-29 | 
Definitions for the ee-patient-age extension.
Guidance on how to interpret the contents of this table can be found here.
Guidance on how to interpret the contents of this table can be found here.
| 1. Extension | |
| Definition | Patient age measure and unit Optional Extension Element - found in all resources. | 
| Control | 0..* | 
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists()) | 
| 2. Extension.extension | |
| Definition | An Extension 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. | 
| Control | 0..0* | 
| Type | Extension | 
| Summary | false | 
| Alternate Names | extensions, user content | 
| 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. | 
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists()) | 
| Slicing | This element introduces a set of slices on Extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: 
 | 
| 3. Extension.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. | 
| Control | 1..1 | 
| Type | uri | 
| XML Representation | In the XML format, this property is represented as an attribute. | 
| Summary | false | 
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. | 
| Fixed Value | https://fhir.ee/StructureDefinition/ee-patient-age | 
| 4. Extension.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). | 
| Control | 0..1 This element is affected by the following invariants: ext-1 | 
| Type | Choice of: Age, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Availability, integer64, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, ExtendedContactDetail, CodeableConcept, ParameterDefinition, dateTime, code, string, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time | 
| [x] Note | See Choice of Data Types for further information about how to use [x] | 
| Summary | false | 
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) | 
| 5. Extension.value[x].value | |
| Definition | The value of the measured amount. The value includes an implicit precision in the presentation of the value. | 
| Control | 10..1 | 
| Type | decimal | 
| Summary | true | 
| Requirements | Precision is handled implicitly in almost all cases of measurement. | 
| Comments | 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). | 
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) | 
| 6. Extension.value[x].comparator | |
| Definition | 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. | 
| Control | 0..1 | 
| Binding | The codes SHALL be taken from QuantityComparator How the Quantity should be understood and represented. | 
| Type | code | 
| Is Modifier | true | 
| Summary | true | 
| Requirements | Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology. | 
| Meaning if Missing | If there is no comparator, then there is no modification of the value | 
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) | 
| 7. Extension.value[x].unit | |
| Definition | A human-readable form of the unit. | 
| Control | 10..1 | 
| Type | string | 
| Summary | true | 
| Requirements | There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms. | 
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) | 
| 8. Extension.value[x].code | |
| Definition | A computer processable form of the unit in some unit representation system. | 
| Control | 10..1 This element is affected by the following invariants: qty-3 | 
| Type | code | 
| Summary | true | 
| Requirements | 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. | 
| Comments | 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. | 
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) | 
Guidance on how to interpret the contents of this table can be found here.
| 1. Extension | |
| Definition | Patient age measure and unit | 
| Control | 0..* | 
| 2. Extension.id | |
| Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. | 
| Control | 0..1 This element is affected by the following invariants: ele-1 | 
| Type | id | 
| XML Representation | In the XML format, this property is represented as an attribute. | 
| Summary | false | 
| 3. Extension.extension | |
| Definition | An Extension | 
| Control | 0..0 | 
| Type | Extension | 
| Summary | false | 
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists()) | 
| Slicing | This element introduces a set of slices on Extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: 
 | 
| 4. Extension.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. | 
| Control | 1..1 | 
| Type | uri | 
| XML Representation | In the XML format, this property is represented as an attribute. | 
| Summary | false | 
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. | 
| Fixed Value | https://fhir.ee/StructureDefinition/ee-patient-age | 
| 5. Extension.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). | 
| Control | 0..1 This element is affected by the following invariants: ext-1 | 
| Type | Age | 
| [x] Note | See Choice of Data Types for further information about how to use [x] | 
| Summary | false | 
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) | 
| 6. Extension.value[x].id | |
| Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. | 
| Control | 0..1 This element is affected by the following invariants: ele-1 | 
| Type | id | 
| XML Representation | In the XML format, this property is represented as an attribute. | 
| Summary | false | 
| 7. Extension.value[x].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 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. | 
| Control | 0..* | 
| Type | Extension | 
| Summary | false | 
| Alternate Names | extensions, user content | 
| 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. | 
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists()) | 
| Slicing | This element introduces a set of slices on Extension.value[x].extension. The slices are unordered and Open, and can be differentiated using the following discriminators: 
 | 
| 8. Extension.value[x].value | |
| Definition | The value of the measured amount. The value includes an implicit precision in the presentation of the value. | 
| Control | 1..1 | 
| Type | decimal | 
| Summary | true | 
| Requirements | Precision is handled implicitly in almost all cases of measurement. | 
| Comments | 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). | 
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) | 
| 9. Extension.value[x].comparator | |
| Definition | 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. | 
| Control | 0..1 | 
| Binding | The codes SHALL be taken from QuantityComparator How the Quantity should be understood and represented | 
| Type | code | 
| Is Modifier | true | 
| Summary | true | 
| Requirements | Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology. | 
| Meaning if Missing | If there is no comparator, then there is no modification of the value | 
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) | 
| 10. Extension.value[x].unit | |
| Definition | A human-readable form of the unit. | 
| Control | 1..1 | 
| Type | string | 
| Summary | true | 
| Requirements | There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms. | 
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) | 
| 11. Extension.value[x].system | |
| Definition | The identification of the system that provides the coded form of the unit. | 
| Control | 0..1 This element is affected by the following invariants: qty-3 | 
| Type | uri | 
| Summary | true | 
| Requirements | Need to know the system that defines the coded form of the unit. | 
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) | 
| 12. Extension.value[x].code | |
| Definition | A computer processable form of the unit in some unit representation system. | 
| Control | 1..1 This element is affected by the following invariants: qty-3 | 
| Type | code | 
| Summary | true | 
| Requirements | 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. | 
| Comments | 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. | 
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) |