eHealth Infrastructure
2.9.0 - release

eHealth Infrastructure - Local Development build (v2.9.0). See the Directory of published versions

Resource Profile: ehealth-devicemetric - Detailed Descriptions

Active as of 2023-08-23

Definitions for the ehealth-devicemetric resource profile.

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

1. DeviceMetric
2. DeviceMetric.extension
Control40..*
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:properties
SliceNameproperties
Control0..*
TypeExtension(ehealth-devicemetric-properties) (Complex Extension)
4. DeviceMetric.extension:qualities
SliceNamequalities
Control1..1
TypeExtension(ehealth-devicemetric-qualities) (Complex Extension)
5. DeviceMetric.extension:qualitiyHistory
SliceNamequalitiyHistory
Control0..*
TypeExtension(ehealth-devicemetric-qualityHistory) (Complex Extension)
6. DeviceMetric.extension:templateQualities
SliceNametemplateQualities
Control3..3
TypeExtension(ehealth-devicemetric-templateQualities) (Complex Extension)
7. DeviceMetric.type
BindingThe codes SHALL be taken from Device Measurement UnitThe codes SHOULD be taken from DeviceMetricAndComponentTypes
8. DeviceMetric.unit
BindingThe codes SHALL be taken from Device Measurement UnitThe codes SHOULD be taken from DeviceMetricAndComponentTypes
9. DeviceMetric.source
Control10..1
TypeReference(ehealth-device|Device) : {r}
10. DeviceMetric.parent
Control0..01
11. DeviceMetric.calibration
Control0..?
12. DeviceMetric.calibration.extension
SlicingThis element introduces a set of slices on DeviceMetric.calibration.extension. The slices are unordered and Open, and can be differentiated using the following discriminators:
  • value @ url
13. DeviceMetric.calibration.extension:calibrationExpires
SliceNamecalibrationExpires
Control0..1
TypeExtension(ehealth-devicemetric-calibrationExpires) (Extension Type: dateTime)

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
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.

Control40..*
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:properties
SliceNameproperties
Definition

Properties of this device. Properties are static by nature whereas qualities are dynamic and may change during the life cycle or calibration cycle of a device.

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(ehealth-devicemetric-properties) (Complex Extension)
InvariantsDefined on this element
ele-1: (: )
ext-1: (: )
5. DeviceMetric.extension:qualities
SliceNamequalities
Definition

Current device quality

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.

Control10..1* This element is affected by the following invariants: ele-1
TypeExtension(ehealth-devicemetric-qualities) (Complex Extension)
InvariantsDefined on this element
ele-1: (: )
ext-1: (: )
6. DeviceMetric.extension:qualitiyHistory
SliceNamequalitiyHistory
Definition

History of device quality

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(ehealth-devicemetric-qualityHistory) (Complex Extension)
InvariantsDefined on this element
ele-1: (: )
ext-1: (: )
7. DeviceMetric.extension:templateQualities
SliceNametemplateQualities
Definition

Device quality default settings for an initial, a degraded, and an overridden device quality.

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.

Control30..3* This element is affected by the following invariants: ele-1
TypeExtension(ehealth-devicemetric-templateQualities) (Complex Extension)
InvariantsDefined on this element
ele-1: (: )
ext-1: (: )
8. 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())
9. DeviceMetric.type
Definition

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

Control1..1
BindingThe codes SHALL be taken from Device Measurement UnitThe codes SHOULD be taken from DeviceMetricAndComponentTypes
TypeCodeableConcept
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()))
10. DeviceMetric.unit
Definition

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

Control0..1
BindingThe codes SHALL be taken from Device Measurement UnitThe codes SHOULD be taken from DeviceMetricAndComponentTypes
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()))
11. 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(ehealth-device|Device) : {r}
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
12. 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.

Control0..01
TypeReference(Device)
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
13. 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
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
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
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

Control4..*
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:properties
SliceNameproperties
Definition

Properties of this device. Properties are static by nature whereas qualities are dynamic and may change during the life cycle or calibration cycle of a device.

Control0..* This element is affected by the following invariants: ele-1
TypeExtension(ehealth-devicemetric-properties) (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())
10. DeviceMetric.extension:qualities
SliceNamequalities
Definition

Current device quality

Control1..1 This element is affected by the following invariants: ele-1
TypeExtension(ehealth-devicemetric-qualities) (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())
11. DeviceMetric.extension:qualitiyHistory
SliceNamequalitiyHistory
Definition

History of device quality

Control0..* This element is affected by the following invariants: ele-1
TypeExtension(ehealth-devicemetric-qualityHistory) (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())
12. DeviceMetric.extension:templateQualities
SliceNametemplateQualities
Definition

Device quality default settings for an initial, a degraded, and an overridden device quality.

Control3..3 This element is affected by the following invariants: ele-1
TypeExtension(ehealth-devicemetric-templateQualities) (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())
13. 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())
14. 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()))
15. DeviceMetric.type
Definition

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

Control1..1
BindingThe codes SHALL be taken from Device Measurement Unit
TypeCodeableConcept
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()))
16. DeviceMetric.unit
Definition

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

Control0..1
BindingThe codes SHALL be taken from Device Measurement Unit
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()))
17. 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(ehealth-device) : {r}
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
18. 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.

Control0..0
TypeReference(Device)
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
19. 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
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
20. 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
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
21. 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
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
22. 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
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
23. DeviceMetric.calibration
Definition

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

Control0..*
TypeBackboneElement
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
24. 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
25. DeviceMetric.calibration.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.calibration.extension. The slices are unordered and Open, and can be differentiated using the following discriminators:
  • value @ url
26. DeviceMetric.calibration.extension:calibrationExpires
SliceNamecalibrationExpires
Definition

Date when the current calibration expires and recalibration is required.

Control0..1 This element is affected by the following invariants: ele-1
TypeExtension(ehealth-devicemetric-calibrationExpires) (Extension Type: dateTime)
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.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())
28. 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
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
29. 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
Summarytrue
InvariantsDefined on this element
ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
30. DeviceMetric.calibration.time
Definition

Describes the time last calibration has been performed.

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