Maschinell erzeugte Dosieranweisung - Definitions - Medication IG DE v1.0.0-ballot1

This page is part of the Medication IG DE (vballot1: Releases Ballot 1) based on FHIR (HL7® FHIR® Standard) R4. This is the current published version in its permanent home (it will always be available at this URL). For a full list of available versions, see the Directory of published versions

Extension: GeneratedDosageInstructionsEx - Detailed Descriptions

Draft as of 2025-07-11

Definitions for the GeneratedDosageInstructions extension.

Key Elements Table
Differential Elements Table
Snapshot Elements Table

Guidance on how to interpret the contents of this table can be foundhere

0. Extension
Definition	Diese Extension enthält die automatisch generierte textuelle Dosierungsanweisung, die auf Basis der bereitgestellten strukturierten Dosierungsinformationen erstellt wurde. Optional Extension Element - found in all resources.
Short	Maschinell erzeugte DosieranweisungOptional Extensions Element
Control	0..* This element is affected by the following invariants: ele-1
Invariants	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 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	ExtensionAdditional 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	20..* This element is affected by the following invariants: ele-1
Type	Extension
Alternate Names	extensions, user content
Invariants	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 areUnordered and Open, and can be differentiated using the following discriminators: value @ url
4. Extension.extension:text
Slice Name	text
Definition	An Extension
Short	ExtensionAdditional content defined by implementations
Control	10..1* This element is affected by the following invariants: ele-1
Type	Extension
Must Support	true
Invariants	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())
6. Extension.extension:text.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 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	ExtensionAdditional 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..0* This element is affected by the following invariants: ele-1
Type	Extension
Alternate Names	extensions, user content
Invariants	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.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
8. Extension.extension:text.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
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.
Control	1..1
Type	uri
XML Format	In the XML format, this property is represented as an attribute.
Fixed Value	`text`
10. Extension.extension:text.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	10..1 This element is affected by the following invariants: ele-1
Type	string, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
Slicing	This element introduces a set of slices on `Extension.extension.value[x]`. The slices areUnordered and Closed, and can be differentiated using the following discriminators: type @ $this
12. Extension.extension:text.value[x]:valueString
Slice Name	valueString
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	10..1 This element is affected by the following invariants: ele-1
Type	string, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Must Support	true
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
14. Extension.extension:algorithm
Slice Name	algorithm
Definition	An Extension
Short	ExtensionAdditional content defined by implementations
Control	10..1* This element is affected by the following invariants: ele-1
Type	Extension
Must Support	true
Invariants	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())
16. Extension.extension:algorithm.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 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	ExtensionAdditional 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..0* This element is affected by the following invariants: ele-1
Type	Extension
Alternate Names	extensions, user content
Invariants	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.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
18. Extension.extension:algorithm.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
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.
Control	1..1
Type	uri
XML Format	In the XML format, this property is represented as an attribute.
Fixed Value	`algorithm`
20. Extension.extension:algorithm.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	10..1 This element is affected by the following invariants: ele-1
Type	Coding, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
Slicing	This element introduces a set of slices on `Extension.extension.value[x]`. The slices areUnordered and Closed, and can be differentiated using the following discriminators: type @ $this
22. Extension.extension:algorithm.value[x]:valueCoding
Slice Name	valueCoding
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	10..1 This element is affected by the following invariants: ele-1
Binding	Unless not suitable, these codes SHALL be taken from For codes, see Algorithmen für Textgenerierung von Dosierungen (extensible to `http://ig.fhir.de/igs/medication/ValueSet/DosageTextAlgorithms`)
Type	Coding, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Must Support	true
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
24. Extension.extension:algorithm.value[x]:valueCoding.system
Definition	The identification of the code system that defines the meaning of the symbol in the code.
Short	Identity of the terminology system
Comments	The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should reference to some definition that establishes the system clearly and unambiguously.
Control	10..1 This element is affected by the following invariants: ele-1
Type	uri
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Must Support	true
Summary	true
Requirements	Need to be unambiguous about the source of the definition of the symbol.
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
26. Extension.extension:algorithm.value[x]:valueCoding.version
Definition	The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured, and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged.
Short	Version of the system - if relevant
Comments	Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date.
Note	This is a business version Id, not a resource version Id (see discussion)
Control	10..1 This element is affected by the following invariants: ele-1
Type	string
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Must Support	true
Summary	true
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
28. Extension.extension:algorithm.value[x]:valueCoding.code
Definition	A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination).
Short	Symbol in syntax defined by the system
Comments	Note that FHIR strings SHALL NOT exceed 1MB in size
Control	10..1 This element is affected by the following invariants: ele-1
Type	code
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Must Support	true
Summary	true
Requirements	Need to refer to a particular code in the system.
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
30. Extension.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
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.
Control	1..1
Type	uri
XML Format	In the XML format, this property is represented as an attribute.
Fixed Value	`http://ig.fhir.de/igs/medication/StructureDefinition/GeneratedDosageInstructions`
32. Extension.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..01 This element is affected by the following invariants: ele-1
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Invariants	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 foundhere

0. Extension
Definition	Diese Extension enthält die automatisch generierte textuelle Dosierungsanweisung, die auf Basis der bereitgestellten strukturierten Dosierungsinformationen erstellt wurde.
Short	Maschinell erzeugte Dosieranweisung
2. Extension.extension
Control	2..?
4. Extension.extension:text
Slice Name	text
Control	1..1
Must Support	true
6. Extension.extension:text.extension
Control	0..0
8. Extension.extension:text.url
Fixed Value	`text`
10. Extension.extension:text.value[x]
Control	1..?
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Slicing	This element introduces a set of slices on `Extension.extension.value[x]`. The slices areUnordered and Open, and can be differentiated using the following discriminators: type @ $this
12. Extension.extension:text.value[x]:valueString
Slice Name	valueString
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Must Support	true
14. Extension.extension:algorithm
Slice Name	algorithm
Control	1..1
Must Support	true
16. Extension.extension:algorithm.extension
Control	0..0
18. Extension.extension:algorithm.url
Fixed Value	`algorithm`
20. Extension.extension:algorithm.value[x]
Control	1..?
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Slicing	This element introduces a set of slices on `Extension.extension.value[x]`. The slices areUnordered and Open, and can be differentiated using the following discriminators: type @ $this
22. Extension.extension:algorithm.value[x]:valueCoding
Slice Name	valueCoding
Control	1..1
Binding	Unless not suitable, these codes SHALL be taken from Algorithmen für Textgenerierung von Dosierungen (extensible to `http://ig.fhir.de/igs/medication/ValueSet/DosageTextAlgorithms`)
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Must Support	true
24. Extension.extension:algorithm.value[x]:valueCoding.system
Control	1..?
Must Support	true
26. Extension.extension:algorithm.value[x]:valueCoding.version
Note	This is a business version Id, not a resource version Id (see discussion)
Control	1..?
Must Support	true
28. Extension.extension:algorithm.value[x]:valueCoding.code
Control	1..?
Must Support	true
30. Extension.url
Fixed Value	`http://ig.fhir.de/igs/medication/StructureDefinition/GeneratedDosageInstructions`
32. Extension.value[x]
Control	0..0

Guidance on how to interpret the contents of this table can be foundhere

0. Extension
Definition	Diese Extension enthält die automatisch generierte textuelle Dosierungsanweisung, die auf Basis der bereitgestellten strukturierten Dosierungsinformationen erstellt wurde.
Short	Maschinell erzeugte Dosieranweisung
Control	0..* This element is affected by the following invariants: ele-1
Invariants	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.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 inter-element referencing
Control	0..1
Type	string
XML Format	In the XML format, this property is represented as an attribute.
4. Extension.extension
Definition	An Extension
Short	Extension
Control	2..* This element is affected by the following invariants: ele-1
Type	Extension
Invariants	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 areUnordered and Open, and can be differentiated using the following discriminators: value @ url
6. Extension.extension:text
Slice Name	text
Definition	An Extension
Short	Extension
Control	1..1 This element is affected by the following invariants: ele-1
Type	Extension
Must Support	true
Invariants	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()`)
8. Extension.extension:text.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 inter-element referencing
Control	0..1
Type	string
XML Format	In the XML format, this property is represented as an attribute.
10. Extension.extension:text.extension
Definition	An Extension
Short	Extension
Control	0..0 This element is affected by the following invariants: ele-1
Type	Extension
Invariants	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.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
12. Extension.extension:text.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
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.
Control	1..1
Type	uri
XML Format	In the XML format, this property is represented as an attribute.
Fixed Value	`text`
14. Extension.extension:text.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	1..1 This element is affected by the following invariants: ele-1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
Slicing	This element introduces a set of slices on `Extension.extension.value[x]`. The slices areUnordered and Closed, and can be differentiated using the following discriminators: type @ $this
16. Extension.extension:text.value[x]:valueString
Slice Name	valueString
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	1..1 This element is affected by the following invariants: ele-1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Must Support	true
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
18. Extension.extension:algorithm
Slice Name	algorithm
Definition	An Extension
Short	Extension
Control	1..1 This element is affected by the following invariants: ele-1
Type	Extension
Must Support	true
Invariants	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()`)
20. Extension.extension:algorithm.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 inter-element referencing
Control	0..1
Type	string
XML Format	In the XML format, this property is represented as an attribute.
22. Extension.extension:algorithm.extension
Definition	An Extension
Short	Extension
Control	0..0 This element is affected by the following invariants: ele-1
Type	Extension
Invariants	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.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
24. Extension.extension:algorithm.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
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.
Control	1..1
Type	uri
XML Format	In the XML format, this property is represented as an attribute.
Fixed Value	`algorithm`
26. Extension.extension:algorithm.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	1..1 This element is affected by the following invariants: ele-1
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
Slicing	This element introduces a set of slices on `Extension.extension.value[x]`. The slices areUnordered and Closed, and can be differentiated using the following discriminators: type @ $this
28. Extension.extension:algorithm.value[x]:valueCoding
Slice Name	valueCoding
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	1..1 This element is affected by the following invariants: ele-1
Binding	Unless not suitable, these codes SHALL be taken from Algorithmen für Textgenerierung von Dosierungen (extensible to `http://ig.fhir.de/igs/medication/ValueSet/DosageTextAlgorithms`)
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Must Support	true
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
30. Extension.extension:algorithm.value[x]:valueCoding.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 inter-element referencing
Control	0..1
Type	string
XML Format	In the XML format, this property is represented as an attribute.
32. Extension.extension:algorithm.value[x]:valueCoding.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..* This element is affected by the following invariants: ele-1
Type	Extension
Standard Status	Normative (from Normative)
Alternate Names	extensions, user content
Invariants	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.value[x].extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
34. Extension.extension:algorithm.value[x]:valueCoding.system
Definition	The identification of the code system that defines the meaning of the symbol in the code.
Short	Identity of the terminology system
Comments	The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should reference to some definition that establishes the system clearly and unambiguously.
Control	1..1 This element is affected by the following invariants: ele-1
Type	uri
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Must Support	true
Summary	true
Requirements	Need to be unambiguous about the source of the definition of the symbol.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
36. Extension.extension:algorithm.value[x]:valueCoding.version
Definition	The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured, and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged.
Short	Version of the system - if relevant
Comments	Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date.
Note	This is a business version Id, not a resource version Id (see discussion)
Control	1..1 This element is affected by the following invariants: ele-1
Type	string
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Must Support	true
Summary	true
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
38. Extension.extension:algorithm.value[x]:valueCoding.code
Definition	A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination).
Short	Symbol in syntax defined by the system
Comments	Note that FHIR strings SHALL NOT exceed 1MB in size
Control	1..1 This element is affected by the following invariants: ele-1
Type	code
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Must Support	true
Summary	true
Requirements	Need to refer to a particular code in the system.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
40. Extension.extension:algorithm.value[x]:valueCoding.display
Definition	A representation of the meaning of the code in the system, following the rules of the system.
Short	Representation defined by the system
Comments	Note that FHIR strings SHALL NOT exceed 1MB in size
Control	0..1 This element is affected by the following invariants: ele-1
Type	string
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	Need to be able to carry a human-readable meaning of the code for readers that do not know the system.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
42. Extension.extension:algorithm.value[x]:valueCoding.userSelected
Definition	Indicates that this coding was chosen by a user directly - e.g. off a pick list of available items (codes or displays).
Short	If this coding was chosen directly by the user
Comments	Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
Control	0..1 This element is affected by the following invariants: ele-1
Type	boolean
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	true
Requirements	This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
44. Extension.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
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.
Control	1..1
Type	uri
XML Format	In the XML format, this property is represented as an attribute.
Fixed Value	`http://ig.fhir.de/igs/medication/StructureDefinition/GeneratedDosageInstructions`
46. Extension.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..0 This element is affected by the following invariants: ele-1
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)