Point-of-Care Device Implementation Guide
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Point-of-Care Device Implementation Guide, published by HL7 International - Devices Work Group. This is not an authorized publication; it is the continuous build for version current). This version is based on the current content of https://github.com/HL7/uv-pocd/ and changes regularly. See the Directory of published versions

Resource Profile: EnumerationDeviceMetric - Detailed Descriptions

Draft as of 2022-01-16

Definitions for the EnumerationDeviceMetric resource profile.

Guidance on how to interpret the contents of this table can be found here.

1. DeviceMetric
2. DeviceMetric.extension
SlicingThis element introduces a set of slices on DeviceMetric.extension. The slices are unordered and Open, and can be differentiated using the following discriminators:
  • value @ url
3. DeviceMetric.extension:instance
SliceNameinstance
Definition

Instance number or label for multiple components of the same type.

Control0..1
TypeExtension(DeviceInstance) (Complex Extension)
Must Supporttrue
4. DeviceMetric.extension:instance.extension:number
SliceNamenumber
Control0..?
5. DeviceMetric.extension:instance.extension:number.valueUnsignedInt
Control0..?
6. DeviceMetric.extension:instance.extension:label
SliceNamelabel
Control0..?
7. DeviceMetric.extension:instance.extension:label.valueString
Control0..?
8. DeviceMetric.extension:relation
SliceNamerelation
Definition

Relation allows the modelling of relationships between a metric and other containment tree entries.

Control0..?
TypeExtension(Relation) (Complex Extension)
9. DeviceMetric.extension:metricAvailability
SliceNamemetricAvailability
Definition

Availability of the means that derives the metric state.

Control0..1
TypeExtension(MetricAvailability) (Extension Type: code)
Must Supporttrue
10. DeviceMetric.type
BindingThe codes SHALL be taken from MDC Metric nomenclature; other codes may be used where these codes are not suitableThe codes SHOULD be taken from DeviceMetricAndComponentTypes
Must Supporttrue
11. DeviceMetric.type.coding
Control0..?
12. DeviceMetric.type.coding.system
Control0..?
13. DeviceMetric.type.coding.version
NoteThis is a business versionId, not a resource version id (see discussion)
Control0..?
14. DeviceMetric.type.coding.code
Control0..?
15. DeviceMetric.type.text
Control0..?
16. DeviceMetric.unit
Control0..01
17. DeviceMetric.source
Control10..1
TypeReference(MdsDevice|Device)
Must Supporttrue
18. DeviceMetric.parent
Control10..1
TypeReference(ChannelDevice|Device)
Must Supporttrue
19. DeviceMetric.operationalStatus
Must Supporttrue
20. DeviceMetric.color
21. DeviceMetric.category
Must Supporttrue
22. DeviceMetric.measurementPeriod
Must Supporttrue
23. DeviceMetric.measurementPeriod.repeat
Control0..?
24. DeviceMetric.measurementPeriod.repeat.duration
Control0..?
25. DeviceMetric.measurementPeriod.repeat.period
Control0..?
26. DeviceMetric.measurementPeriod.repeat.periodUnit
Control0..?
27. DeviceMetric.calibration
Must Supporttrue
28. DeviceMetric.calibration.type
29. DeviceMetric.calibration.state
30. DeviceMetric.calibration.time

Guidance on how to interpret the contents of this table can be found here.

1. DeviceMetric
Definition

Describes a measurement, calculation or setting capability of a medical device.

Control0..*
Summaryfalse
Comments

For the initial scope, this DeviceMetric resource is only applicable to describe a single metric node in the containment tree that is produced by the context scanner in any medical device that implements or derives from the ISO/IEEE 11073 standard.

InvariantsDefined on this element
dom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources (: contained.contained.empty())
dom-3: If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource (: contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty())
dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated (: contained.meta.versionId.empty() and contained.meta.lastUpdated.empty())
dom-5: If a resource is contained in another resource, it SHALL NOT have a security label (: contained.meta.security.empty())
dom-6: A resource should have narrative for robust management (: text.`div`.exists())
2. DeviceMetric.implicitRules
Definition

A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc.

Control0..1
Typeuri
Is Modifiertrue
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Comments

Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of it's narrative along with other profiles, value sets, etc.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
3. DeviceMetric.extension
Definition

An Extension

May be used to represent additional information that is not part of the basic definition of the resource. 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.

Control0..*
TypeExtension
Summaryfalse
Alternate Namesextensions, 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.

InvariantsDefined 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())
SlicingThis element introduces a set of slices on DeviceMetric.extension. The slices are unordered and Open, and can be differentiated using the following discriminators:
  • value @ url
4. DeviceMetric.extension:instance
SliceNameinstance
Definition

Instance number or label for multiple components of the same type.

May be used to represent additional information that is not part of the basic definition of the resource. 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.

Control0..1* This element is affected by the following invariants: ele-1
TypeExtension(DeviceInstance) (Complex Extension)
Must Supporttrue
InvariantsDefined on this element
ele-1: (: )
ext-1: (: )
5. DeviceMetric.extension:instance.extension:number
SliceNamenumber
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.

Control0..1*
TypeExtension
Summaryfalse
Alternate Namesextensions, 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.

InvariantsDefined 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())
6. DeviceMetric.extension:instance.extension:number.url
Definition

Source of the definition for the extension code - a logical name or a URL.

Control1..1
Typeuri
XML RepresentationIn the XML format, this property is represented as an attribute.
Summaryfalse
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 Valuenumber
7. DeviceMetric.extension:instance.extension:number.value[x]
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

Control10..1
TypeChoice of: unsignedInt, 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, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, time
[x] NoteSee Choice of Data Types for further information about how to use [x]
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summaryfalse
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
SlicingThis element introduces a set of slices on DeviceMetric.extension.extension.value[x]. The slices are unordered and Closed, and can be differentiated using the following discriminators:
  • type @ $this
8. DeviceMetric.extension:instance.extension:number.value[x]:valueUnsignedInt
SliceNamevalueUnsignedInt
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

Control10..1
TypeChoice of: unsignedInt, 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, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, time
[x] NoteSee Choice of Data Types for further information about how to use [x]
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summaryfalse
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
9. DeviceMetric.extension:instance.extension:label
SliceNamelabel
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.

Control0..1*
TypeExtension
Summaryfalse
Alternate Namesextensions, 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.

InvariantsDefined 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())
10. DeviceMetric.extension:instance.extension:label.url
Definition

Source of the definition for the extension code - a logical name or a URL.

Control1..1
Typeuri
XML RepresentationIn the XML format, this property is represented as an attribute.
Summaryfalse
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 Valuelabel
11. DeviceMetric.extension:instance.extension:label.value[x]
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

Control10..1
TypeChoice of: 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] NoteSee Choice of Data Types for further information about how to use [x]
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summaryfalse
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
SlicingThis element introduces a set of slices on DeviceMetric.extension.extension.value[x]. The slices are unordered and Closed, and can be differentiated using the following discriminators:
  • type @ $this
12. DeviceMetric.extension:instance.extension:label.value[x]:valueString
SliceNamevalueString
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

Control10..1
TypeChoice of: 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] NoteSee Choice of Data Types for further information about how to use [x]
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summaryfalse
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
13. DeviceMetric.extension:instance.url
Definition

Source of the definition for the extension code - a logical name or a URL.

Control1..1
Typeuri
XML RepresentationIn the XML format, this property is represented as an attribute.
Summaryfalse
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 Valuehttp://hl7.org/fhir/uv/pocd/StructureDefinition/device-instance
14. DeviceMetric.extension:instance.value[x]
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

Control0..01
TypeChoice 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
[x] NoteSee Choice of Data Types for further information about how to use [x]
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summaryfalse
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
15. DeviceMetric.extension:relation
SliceNamerelation
Definition

Relation allows the modelling of relationships between a metric and other containment tree entries.

May be used to represent additional information that is not part of the basic definition of the resource. 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.

Control This element is affected by the following invariants: ele-1
TypeExtension(Relation) (Complex Extension)
InvariantsDefined on this element
ele-1: (: )
ext-1: (: )
16. DeviceMetric.extension:metricAvailability
SliceNamemetricAvailability
Definition

Availability of the means that derives the metric state.

Control0..1 This element is affected by the following invariants: ele-1
TypeExtension(MetricAvailability) (Extension Type: code)
Must Supporttrue
InvariantsDefined 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())
17. DeviceMetric.modifierExtension
Definition

May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

Control0..*
TypeExtension
Is Modifiertrue
Summaryfalse
Requirements

Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

Alternate Namesextensions, 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.

InvariantsDefined 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())
18. DeviceMetric.type
Definition

Describes the type of the metric. For example: Heart Rate, PEEP Setting, etc.

Control1..1
BindingThe codes SHALL be taken from MDC Metric nomenclature; other codes may be used where these codes are not suitableThe codes SHOULD be taken from DeviceMetricAndComponentTypes
TypeCodeableConcept
Must Supporttrue
Summarytrue
Comments

DeviceMetric.type can be referred to either IEEE 11073-10101 or LOINC.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
19. DeviceMetric.type.coding
Definition

A reference to a code defined by a terminology system.

Control0..*
TypeCoding
Summarytrue
Requirements

Allows for alternative encodings within a code system, and translations to other code systems.

Comments

Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
20. DeviceMetric.type.coding.system
Definition

The identification of the code system that defines the meaning of the symbol in the code.

Control0..1
Typeuri
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Requirements

Need to be unambiguous about the source of the definition of the symbol.

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.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
21. DeviceMetric.type.coding.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.

NoteThis is a business versionId, not a resource version id (see discussion)
Control0..1
Typestring
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
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.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
22. DeviceMetric.type.coding.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).

Control0..1
Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Requirements

Need to refer to a particular code in the system.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
23. DeviceMetric.type.text
Definition

A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user.

Control0..1
Typestring
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Requirements

The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source.

Comments

Very often the text is the same as a displayName of one of the codings.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
24. DeviceMetric.unit
Definition

Describes the unit that an observed value determined for this metric will have. For example: Percent, Seconds, etc.

Control0..01
BindingThe codes SHOULD be taken from DeviceMetricAndComponentTypes

Describes the unit of the metric.

TypeCodeableConcept
Summarytrue
Comments

DeviceMetric.unit can refer to either UCUM or preferable a RTMMS coding system.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
25. DeviceMetric.source
Definition

Describes the link to the Device that this DeviceMetric belongs to and that contains administrative device information such as manufacturer, serial number, etc.

Control10..1
TypeReference(MdsDevice|Device)
Must Supporttrue
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
26. DeviceMetric.parent
Definition

Describes the link to the Device that this DeviceMetric belongs to and that provide information about the location of this DeviceMetric in the containment structure of the parent Device. An example would be a Device that represents a Channel. This reference can be used by a client application to distinguish DeviceMetrics that have the same type, but should be interpreted based on their containment location.

Control10..1
TypeReference(ChannelDevice|Device)
Must Supporttrue
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
27. DeviceMetric.operationalStatus
Definition

Indicates current operational state of the device. For example: On, Off, Standby, etc.

Control0..1
BindingThe codes SHALL be taken from DeviceMetricOperationalStatus

Describes the operational status of the DeviceMetric.

Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Must Supporttrue
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
28. DeviceMetric.color
Definition

Describes the color representation for the metric. This is often used to aid clinicians to track and identify parameter types by color. In practice, consider a Patient Monitor that has ECG/HR and Pleth for example; the parameters are displayed in different characteristic colors, such as HR-blue, BP-green, and PR and SpO2- magenta.

Control0..1
BindingThe codes SHALL be taken from DeviceMetricColor

Describes the typical color of representation.

Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
29. DeviceMetric.category
Definition

Indicates the category of the observation generation process. A DeviceMetric can be for example a setting, measurement, or calculation.

Control1..1
BindingThe codes SHALL be taken from DeviceMetricCategory

Describes the category of the metric.

Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Must Supporttrue
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
30. DeviceMetric.measurementPeriod
Definition

Describes the measurement repetition time. This is not necessarily the same as the update period. The measurement repetition time can range from milliseconds up to hours. An example for a measurement repetition time in the range of milliseconds is the sampling rate of an ECG. An example for a measurement repetition time in the range of hours is a NIBP that is triggered automatically every hour. The update period may be different than the measurement repetition time, if the device does not update the published observed value with the same frequency as it was measured.

Control0..1
TypeTiming
Must Supporttrue
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
31. DeviceMetric.measurementPeriod.modifierExtension
Definition

May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. 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. Applications processing a resource are required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

Control0..*
TypeExtension
Is Modifiertrue
Summarytrue
Requirements

Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

Alternate Namesextensions, user content, modifiers
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.

InvariantsDefined 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())
32. DeviceMetric.measurementPeriod.repeat
Definition

A set of rules that describe when the event is scheduled.

Control0..1
TypeElement
Summarytrue
Requirements

Many timing schedules are determined by regular repetitions.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
tim-1: if there's a duration, there needs to be duration units (: duration.empty() or durationUnit.exists())
tim-2: if there's a period, there needs to be period units (: period.empty() or periodUnit.exists())
tim-4: duration SHALL be a non-negative value (: duration.exists() implies duration >= 0)
tim-5: period SHALL be a non-negative value (: period.exists() implies period >= 0)
tim-6: If there's a periodMax, there must be a period (: periodMax.empty() or period.exists())
tim-7: If there's a durationMax, there must be a duration (: durationMax.empty() or duration.exists())
tim-8: If there's a countMax, there must be a count (: countMax.empty() or count.exists())
tim-9: If there's an offset, there must be a when (and not C, CM, CD, CV) (: offset.empty() or (when.exists() and ((when in ('C' | 'CM' | 'CD' | 'CV')).not())))
tim-10: If there's a timeOfDay, there cannot be a when, or vice versa (: timeOfDay.empty() or when.empty())
33. DeviceMetric.measurementPeriod.repeat.duration
Definition

How long this thing happens for when it happens. If durationMax is present, this element indicates the lower bound of the allowed range of the duration.

Control0..1
Typedecimal
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Requirements

Some activities are not instantaneous and need to be maintained for a period of time.

Comments

For some events the duration is part of the definition of the event (e.g. IV infusions, where the duration is implicit in the specified quantity and rate). For others, it's part of the timing specification (e.g. exercise).

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
34. DeviceMetric.measurementPeriod.repeat.period
Definition

Indicates the duration of time over which repetitions are to occur; e.g. to express "3 times per day", 3 would be the frequency and "1 day" would be the period. If periodMax is present, this element indicates the lower bound of the allowed range of the period length.

Control0..1
Typedecimal
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
35. DeviceMetric.measurementPeriod.repeat.periodUnit
Definition

The units of time for the period in UCUM units.

Control0..1
BindingThe codes SHALL be taken from UnitsOfTime

A unit of time (units from UCUM).

Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
36. DeviceMetric.calibration
Definition

Describes the calibrations that have been performed or that are required to be performed.

Control0..*
TypeBackboneElement
Must Supporttrue
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
37. DeviceMetric.calibration.modifierExtension
Definition

May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. 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. Applications processing a resource are required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

Control0..*
TypeExtension
Is Modifiertrue
Summarytrue
Requirements

Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

Alternate Namesextensions, user content, modifiers
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.

InvariantsDefined 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())
38. DeviceMetric.calibration.type
Definition

Describes the type of the calibration method.

Control0..1
BindingThe codes SHALL be taken from DeviceMetricCalibrationType

Describes the type of a metric calibration.

Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
39. DeviceMetric.calibration.state
Definition

Describes the state of the calibration.

Control0..1
BindingThe codes SHALL be taken from DeviceMetricCalibrationState

Describes the state of a metric calibration.

Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
40. DeviceMetric.calibration.time
Definition

Describes the time last calibration has been performed.

Control0..1
Typeinstant
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined 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. DeviceMetric
Definition

Describes a measurement, calculation or setting capability of a medical device.

Control0..*
Summaryfalse
Comments

For the initial scope, this DeviceMetric resource is only applicable to describe a single metric node in the containment tree that is produced by the context scanner in any medical device that implements or derives from the ISO/IEEE 11073 standard.

2. DeviceMetric.id
Definition

The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes.

Control0..1
Typeid
Summarytrue
Comments

The only time that a resource does not have an id is when it is being submitted to the server using a create operation.

3. DeviceMetric.meta
Definition

The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource.

Control0..1
TypeMeta
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
4. DeviceMetric.implicitRules
Definition

A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc.

Control0..1
Typeuri
Is Modifiertrue
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Comments

Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of it's narrative along with other profiles, value sets, etc.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
5. DeviceMetric.language
Definition

The base language in which the resource is written.

Control0..1
BindingThe codes SHOULD be taken from CommonLanguages A human language
Additional BindingsPurpose
AllLanguagesMax Binding
Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summaryfalse
Comments

Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource. Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute).

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
6. DeviceMetric.text
Definition

A human-readable narrative that contains a summary of the resource and can be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it "clinically safe" for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety.

Control0..1
TypeNarrative
Summaryfalse
Alternate Namesnarrative, html, xhtml, display
Comments

Contained resources do not have narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied). This may be necessary for data from legacy systems where information is captured as a "text blob" or where text is additionally entered raw or narrated and encoded information is added later.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
7. DeviceMetric.contained
Definition

These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, and nor can they have their own independent transaction scope.

Control0..*
TypeResource
Summaryfalse
Alternate Namesinline resources, anonymous resources, contained resources
Comments

This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again. Contained resources may have profiles and tags In their meta elements, but SHALL NOT have security labels.

8. DeviceMetric.extension
Definition

An Extension

Control0..*
TypeExtension
Summaryfalse
InvariantsDefined 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())
SlicingThis element introduces a set of slices on DeviceMetric.extension. The slices are unordered and Open, and can be differentiated using the following discriminators:
  • value @ url
9. DeviceMetric.extension:instance
SliceNameinstance
Definition

Instance number or label for multiple components of the same type.

Control0..1 This element is affected by the following invariants: ele-1
TypeExtension(DeviceInstance) (Complex Extension)
Must Supporttrue
InvariantsDefined 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())
10. DeviceMetric.extension:instance.id
Definition

Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

Control0..1
Typestring
XML RepresentationIn the XML format, this property is represented as an attribute.
Summaryfalse
11. DeviceMetric.extension:instance.extension
Definition

An Extension

Control0..*
TypeExtension
Summaryfalse
InvariantsDefined 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())
SlicingThis element introduces a set of slices on DeviceMetric.extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators:
  • value @ url
12. DeviceMetric.extension:instance.extension:number
SliceNamenumber
Definition

An Extension

Control0..1
TypeExtension
Summaryfalse
InvariantsDefined 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())
13. DeviceMetric.extension:instance.extension:number.id
Definition

Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

Control0..1
Typestring
XML RepresentationIn the XML format, this property is represented as an attribute.
Summaryfalse
14. DeviceMetric.extension:instance.extension:number.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.

Control0..*
TypeExtension
Summaryfalse
Alternate Namesextensions, 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.

InvariantsDefined 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())
SlicingThis element introduces a set of slices on DeviceMetric.extension.extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators:
  • value @ url
15. DeviceMetric.extension:instance.extension:number.url
Definition

Source of the definition for the extension code - a logical name or a URL.

Control1..1
Typeuri
XML RepresentationIn the XML format, this property is represented as an attribute.
Summaryfalse
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 Valuenumber
16. DeviceMetric.extension:instance.extension:number.value[x]
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

Control1..1
TypeunsignedInt
[x] NoteSee Choice of Data Types for further information about how to use [x]
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summaryfalse
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
SlicingThis element introduces a set of slices on DeviceMetric.extension.extension.value[x]. The slices are unordered and Closed, and can be differentiated using the following discriminators:
  • type @ $this
17. DeviceMetric.extension:instance.extension:number.value[x]:valueUnsignedInt
SliceNamevalueUnsignedInt
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

Control1..1
TypeunsignedInt
[x] NoteSee Choice of Data Types for further information about how to use [x]
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summaryfalse
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
18. DeviceMetric.extension:instance.extension:label
SliceNamelabel
Definition

An Extension

Control0..1
TypeExtension
Summaryfalse
InvariantsDefined 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())
19. DeviceMetric.extension:instance.extension:label.id
Definition

Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

Control0..1
Typestring
XML RepresentationIn the XML format, this property is represented as an attribute.
Summaryfalse
20. DeviceMetric.extension:instance.extension:label.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.

Control0..*
TypeExtension
Summaryfalse
Alternate Namesextensions, 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.

InvariantsDefined 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())
SlicingThis element introduces a set of slices on DeviceMetric.extension.extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators:
  • value @ url
21. DeviceMetric.extension:instance.extension:label.url
Definition

Source of the definition for the extension code - a logical name or a URL.

Control1..1
Typeuri
XML RepresentationIn the XML format, this property is represented as an attribute.
Summaryfalse
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 Valuelabel
22. DeviceMetric.extension:instance.extension:label.value[x]
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

Control1..1
Typestring
[x] NoteSee Choice of Data Types for further information about how to use [x]
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summaryfalse
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
SlicingThis element introduces a set of slices on DeviceMetric.extension.extension.value[x]. The slices are unordered and Closed, and can be differentiated using the following discriminators:
  • type @ $this
23. DeviceMetric.extension:instance.extension:label.value[x]:valueString
SliceNamevalueString
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

Control1..1
Typestring
[x] NoteSee Choice of Data Types for further information about how to use [x]
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summaryfalse
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
24. DeviceMetric.extension:instance.url
Definition

Source of the definition for the extension code - a logical name or a URL.

Control1..1
Typeuri
XML RepresentationIn the XML format, this property is represented as an attribute.
Summaryfalse
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 Valuehttp://hl7.org/fhir/uv/pocd/StructureDefinition/device-instance
25. DeviceMetric.extension:instance.value[x]
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

Control0..0
TypeChoice 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
[x] NoteSee Choice of Data Types for further information about how to use [x]
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summaryfalse
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
26. DeviceMetric.extension:relation
SliceNamerelation
Definition

Relation allows the modelling of relationships between a metric and other containment tree entries.

Control0..* This element is affected by the following invariants: ele-1
TypeExtension(Relation) (Complex Extension)
InvariantsDefined 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())
27. DeviceMetric.extension:metricAvailability
SliceNamemetricAvailability
Definition

Availability of the means that derives the metric state.

Control0..1 This element is affected by the following invariants: ele-1
TypeExtension(MetricAvailability) (Extension Type: code)
Must Supporttrue
InvariantsDefined 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())
28. DeviceMetric.modifierExtension
Definition

May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

Control0..*
TypeExtension
Is Modifiertrue
Summaryfalse
Requirements

Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

Alternate Namesextensions, 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.

InvariantsDefined 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())
29. DeviceMetric.identifier
Definition

Unique instance identifiers assigned to a device by the device or gateway software, manufacturers, other organizations or owners. For example: handle ID.

NoteThis is a business identifier, not a resource identifier (see discussion)
Control0..*
TypeIdentifier
Summarytrue
Comments

For identifiers assigned to a device by the device or gateway software, the system element of the identifier should be set to the unique identifier of the device.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
30. DeviceMetric.type
Definition

Describes the type of the metric. For example: Heart Rate, PEEP Setting, etc.

Control1..1
BindingThe codes SHALL be taken from MDC Metric nomenclature; other codes may be used where these codes are not suitable
TypeCodeableConcept
Must Supporttrue
Summarytrue
Comments

DeviceMetric.type can be referred to either IEEE 11073-10101 or LOINC.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
31. DeviceMetric.type.id
Definition

Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

Control0..1
Typestring
XML RepresentationIn the XML format, this property is represented as an attribute.
Summaryfalse
32. DeviceMetric.type.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.

Control0..*
TypeExtension
Summaryfalse
Alternate Namesextensions, 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.

InvariantsDefined 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())
SlicingThis element introduces a set of slices on DeviceMetric.type.extension. The slices are unordered and Open, and can be differentiated using the following discriminators:
  • value @ url
33. DeviceMetric.type.coding
Definition

A reference to a code defined by a terminology system.

Control0..*
TypeCoding
Summarytrue
Requirements

Allows for alternative encodings within a code system, and translations to other code systems.

Comments

Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
34. DeviceMetric.type.coding.id
Definition

Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

Control0..1
Typestring
XML RepresentationIn the XML format, this property is represented as an attribute.
Summaryfalse
35. DeviceMetric.type.coding.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.

Control0..*
TypeExtension
Summaryfalse
Alternate Namesextensions, 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.

InvariantsDefined 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())
SlicingThis element introduces a set of slices on DeviceMetric.type.coding.extension. The slices are unordered and Open, and can be differentiated using the following discriminators:
  • value @ url
36. DeviceMetric.type.coding.system
Definition

The identification of the code system that defines the meaning of the symbol in the code.

Control0..1
Typeuri
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Requirements

Need to be unambiguous about the source of the definition of the symbol.

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.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
37. DeviceMetric.type.coding.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.

NoteThis is a business versionId, not a resource version id (see discussion)
Control0..1
Typestring
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
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.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
38. DeviceMetric.type.coding.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).

Control0..1
Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Requirements

Need to refer to a particular code in the system.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
39. DeviceMetric.type.coding.display
Definition

A representation of the meaning of the code in the system, following the rules of the system.

Control0..1
Typestring
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Requirements

Need to be able to carry a human-readable meaning of the code for readers that do not know the system.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
40. DeviceMetric.type.coding.userSelected
Definition

Indicates that this coding was chosen by a user directly - e.g. off a pick list of available items (codes or displays).

Control0..1
Typeboolean
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
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.

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.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
41. DeviceMetric.type.text
Definition

A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user.

Control0..1
Typestring
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Requirements

The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source.

Comments

Very often the text is the same as a displayName of one of the codings.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
42. DeviceMetric.unit
Definition

Describes the unit that an observed value determined for this metric will have. For example: Percent, Seconds, etc.

Control0..0
BindingThe codes SHOULD be taken from DeviceMetricAndComponentTypes Describes the unit of the metric
TypeCodeableConcept
Summarytrue
Comments

DeviceMetric.unit can refer to either UCUM or preferable a RTMMS coding system.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
43. DeviceMetric.source
Definition

Describes the link to the Device that this DeviceMetric belongs to and that contains administrative device information such as manufacturer, serial number, etc.

Control1..1
TypeReference(MdsDevice)
Must Supporttrue
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
44. DeviceMetric.parent
Definition

Describes the link to the Device that this DeviceMetric belongs to and that provide information about the location of this DeviceMetric in the containment structure of the parent Device. An example would be a Device that represents a Channel. This reference can be used by a client application to distinguish DeviceMetrics that have the same type, but should be interpreted based on their containment location.

Control1..1
TypeReference(ChannelDevice)
Must Supporttrue
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
45. DeviceMetric.operationalStatus
Definition

Indicates current operational state of the device. For example: On, Off, Standby, etc.

Control0..1
BindingThe codes SHALL be taken from DeviceMetricOperationalStatus Describes the operational status of the DeviceMetric
Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Must Supporttrue
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
46. DeviceMetric.color
Definition

Describes the color representation for the metric. This is often used to aid clinicians to track and identify parameter types by color. In practice, consider a Patient Monitor that has ECG/HR and Pleth for example; the parameters are displayed in different characteristic colors, such as HR-blue, BP-green, and PR and SpO2- magenta.

Control0..1
BindingThe codes SHALL be taken from DeviceMetricColor Describes the typical color of representation
Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
47. DeviceMetric.category
Definition

Indicates the category of the observation generation process. A DeviceMetric can be for example a setting, measurement, or calculation.

Control1..1
BindingThe codes SHALL be taken from DeviceMetricCategory Describes the category of the metric
Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Must Supporttrue
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
48. DeviceMetric.measurementPeriod
Definition

Describes the measurement repetition time. This is not necessarily the same as the update period. The measurement repetition time can range from milliseconds up to hours. An example for a measurement repetition time in the range of milliseconds is the sampling rate of an ECG. An example for a measurement repetition time in the range of hours is a NIBP that is triggered automatically every hour. The update period may be different than the measurement repetition time, if the device does not update the published observed value with the same frequency as it was measured.

Control0..1
TypeTiming
Must Supporttrue
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
49. DeviceMetric.measurementPeriod.id
Definition

Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

Control0..1
Typestring
XML RepresentationIn the XML format, this property is represented as an attribute.
Summaryfalse
50. DeviceMetric.measurementPeriod.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.

Control0..*
TypeExtension
Summaryfalse
Alternate Namesextensions, 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.

InvariantsDefined 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())
SlicingThis element introduces a set of slices on DeviceMetric.measurementPeriod.extension. The slices are unordered and Open, and can be differentiated using the following discriminators:
  • value @ url
51. DeviceMetric.measurementPeriod.modifierExtension
Definition

May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. 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. Applications processing a resource are required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

Control0..*
TypeExtension
Is Modifiertrue
Summarytrue
Requirements

Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

Alternate Namesextensions, user content, modifiers
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.

InvariantsDefined 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())
52. DeviceMetric.measurementPeriod.event
Definition

Identifies specific times when the event occurs.

Control0..*
TypedateTime
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Requirements

In a Medication Administration Record, for instance, you need to take a general specification, and turn it into a precise specification.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
53. DeviceMetric.measurementPeriod.repeat
Definition

A set of rules that describe when the event is scheduled.

Control0..1
TypeElement
Summarytrue
Requirements

Many timing schedules are determined by regular repetitions.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
tim-1: if there's a duration, there needs to be duration units (: duration.empty() or durationUnit.exists())
tim-2: if there's a period, there needs to be period units (: period.empty() or periodUnit.exists())
tim-4: duration SHALL be a non-negative value (: duration.exists() implies duration >= 0)
tim-5: period SHALL be a non-negative value (: period.exists() implies period >= 0)
tim-6: If there's a periodMax, there must be a period (: periodMax.empty() or period.exists())
tim-7: If there's a durationMax, there must be a duration (: durationMax.empty() or duration.exists())
tim-8: If there's a countMax, there must be a count (: countMax.empty() or count.exists())
tim-9: If there's an offset, there must be a when (and not C, CM, CD, CV) (: offset.empty() or (when.exists() and ((when in ('C' | 'CM' | 'CD' | 'CV')).not())))
tim-10: If there's a timeOfDay, there cannot be a when, or vice versa (: timeOfDay.empty() or when.empty())
54. DeviceMetric.measurementPeriod.repeat.id
Definition

Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

Control0..1
Typestring
XML RepresentationIn the XML format, this property is represented as an attribute.
Summaryfalse
55. DeviceMetric.measurementPeriod.repeat.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.

Control0..*
TypeExtension
Summaryfalse
Alternate Namesextensions, 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.

InvariantsDefined 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())
SlicingThis element introduces a set of slices on DeviceMetric.measurementPeriod.repeat.extension. The slices are unordered and Open, and can be differentiated using the following discriminators:
  • value @ url
56. DeviceMetric.measurementPeriod.repeat.bounds[x]
Definition

Either a duration for the length of the timing schedule, a range of possible length, or outer bounds for start and/or end limits of the timing schedule.

Control0..1
TypeChoice of: Duration, Range, Period
[x] NoteSee Choice of Data Types for further information about how to use [x]
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
57. DeviceMetric.measurementPeriod.repeat.count
Definition

A total count of the desired number of repetitions across the duration of the entire timing specification. If countMax is present, this element indicates the lower bound of the allowed range of count values.

Control0..1
TypepositiveInt
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Requirements

Repetitions may be limited by end time or total occurrences.

Comments

If you have both bounds and count, then this should be understood as within the bounds period, until count times happens.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
58. DeviceMetric.measurementPeriod.repeat.countMax
Definition

If present, indicates that the count is a range - so to perform the action between [count] and [countMax] times.

Control0..1
TypepositiveInt
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
59. DeviceMetric.measurementPeriod.repeat.duration
Definition

How long this thing happens for when it happens. If durationMax is present, this element indicates the lower bound of the allowed range of the duration.

Control0..1
Typedecimal
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Requirements

Some activities are not instantaneous and need to be maintained for a period of time.

Comments

For some events the duration is part of the definition of the event (e.g. IV infusions, where the duration is implicit in the specified quantity and rate). For others, it's part of the timing specification (e.g. exercise).

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
60. DeviceMetric.measurementPeriod.repeat.durationMax
Definition

If present, indicates that the duration is a range - so to perform the action between [duration] and [durationMax] time length.

Control0..1
Typedecimal
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Requirements

Some activities are not instantaneous and need to be maintained for a period of time.

Comments

For some events the duration is part of the definition of the event (e.g. IV infusions, where the duration is implicit in the specified quantity and rate). For others, it's part of the timing specification (e.g. exercise).

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
61. DeviceMetric.measurementPeriod.repeat.durationUnit
Definition

The units of time for the duration, in UCUM units.

Control0..1
BindingThe codes SHALL be taken from UnitsOfTime A unit of time (units from UCUM)
Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
62. DeviceMetric.measurementPeriod.repeat.frequency
Definition

The number of times to repeat the action within the specified period. If frequencyMax is present, this element indicates the lower bound of the allowed range of the frequency.

Control0..1
TypepositiveInt
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Meaning if MissingIf no frequency is stated, the assumption is that the event occurs once per period, but systems SHOULD always be specific about this
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
63. DeviceMetric.measurementPeriod.repeat.frequencyMax
Definition

If present, indicates that the frequency is a range - so to repeat between [frequency] and [frequencyMax] times within the period or period range.

Control0..1
TypepositiveInt
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
64. DeviceMetric.measurementPeriod.repeat.period
Definition

Indicates the duration of time over which repetitions are to occur; e.g. to express "3 times per day", 3 would be the frequency and "1 day" would be the period. If periodMax is present, this element indicates the lower bound of the allowed range of the period length.

Control0..1
Typedecimal
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
65. DeviceMetric.measurementPeriod.repeat.periodMax
Definition

If present, indicates that the period is a range from [period] to [periodMax], allowing expressing concepts such as "do this once every 3-5 days.

Control0..1
Typedecimal
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
66. DeviceMetric.measurementPeriod.repeat.periodUnit
Definition

The units of time for the period in UCUM units.

Control0..1
BindingThe codes SHALL be taken from UnitsOfTime A unit of time (units from UCUM)
Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
67. DeviceMetric.measurementPeriod.repeat.dayOfWeek
Definition

If one or more days of week is provided, then the action happens only on the specified day(s).

Control0..*
BindingThe codes SHALL be taken from DaysOfWeek
Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Comments

If no days are specified, the action is assumed to happen every day as otherwise specified. The elements frequency and period cannot be used as well as dayOfWeek.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
68. DeviceMetric.measurementPeriod.repeat.timeOfDay
Definition

Specified time of day for action to take place.

Control0..*
Typetime
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Comments

When time of day is specified, it is inferred that the action happens every day (as filtered by dayofWeek) on the specified times. The elements when, frequency and period cannot be used as well as timeOfDay.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
69. DeviceMetric.measurementPeriod.repeat.when
Definition

An approximate time period during the day, potentially linked to an event of daily living that indicates when the action should occur.

Control0..*
BindingThe codes SHALL be taken from EventTiming Real world event relating to the schedule
Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
Requirements

Timings are frequently determined by occurrences such as waking, eating and sleep.

Comments

When more than one event is listed, the event is tied to the union of the specified events.

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
70. DeviceMetric.measurementPeriod.repeat.offset
Definition

The number of minutes from the event. If the event code does not indicate whether the minutes is before or after the event, then the offset is assumed to be after the event.

Control0..1
TypeunsignedInt
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
71. DeviceMetric.measurementPeriod.code
Definition

A code for the timing schedule (or just text in code.text). Some codes such as BID are ubiquitous, but many institutions define their own additional codes. If a code is provided, the code is understood to be a complete statement of whatever is specified in the structured timing data, and either the code or the data may be used to interpret the Timing, with the exception that .repeat.bounds still applies over the code (and is not contained in the code).

Control0..1
BindingThe codes SHOULD be taken from TimingAbbreviation Code for a known / defined timing pattern
TypeCodeableConcept
Summarytrue
Comments

BID etc. are defined as 'at institutionally specified times'. For example, an institution may choose that BID is "always at 7am and 6pm". If it is inappropriate for this choice to be made, the code BID should not be used. Instead, a distinct organization-specific code should be used in place of the HL7-defined BID code and/or a structured representation should be used (in this case, specifying the two event times).

InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
72. DeviceMetric.calibration
Definition

Describes the calibrations that have been performed or that are required to be performed.

Control0..*
TypeBackboneElement
Must Supporttrue
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
73. DeviceMetric.calibration.id
Definition

Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

Control0..1
Typestring
XML RepresentationIn the XML format, this property is represented as an attribute.
Summaryfalse
74. DeviceMetric.calibration.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.

Control0..*
TypeExtension
Summaryfalse
Alternate Namesextensions, 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.

InvariantsDefined 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())
75. DeviceMetric.calibration.modifierExtension
Definition

May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. 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. Applications processing a resource are required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

Control0..*
TypeExtension
Is Modifiertrue
Summarytrue
Requirements

Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

Alternate Namesextensions, user content, modifiers
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.

InvariantsDefined 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())
76. DeviceMetric.calibration.type
Definition

Describes the type of the calibration method.

Control0..1
BindingThe codes SHALL be taken from DeviceMetricCalibrationType Describes the type of a metric calibration
Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
77. DeviceMetric.calibration.state
Definition

Describes the state of the calibration.

Control0..1
BindingThe codes SHALL be taken from DeviceMetricCalibrationState Describes the state of a metric calibration
Typecode
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
78. DeviceMetric.calibration.time
Definition

Describes the time last calibration has been performed.

Control0..1
Typeinstant
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))