FHIR Genomics Implementation Guide

Notice

Important: This guidance is under active development by NHS England and content may be added or updated on a regular basis.
This Implementation Guide is currently in Draft and SHOULD NOT be used for development or active implementation without express direction from the NHS England Genomics Unit.

StructureDefinition QuestionnaireResponse

The Genomics QuestionnaireResponse is currently based on the core HL7 resource, without any need for profiling.

The profile for QuestionnaireResponse is provided below for completeness.

No additional guidance has been provided on this page as there are no Genomic-specific considerations which need to be made. However, all QuestionnaireResponses submitted to the central service SHALL reference a Questionnaire definition in order to aid validation and presentation of the response content.

Profile url	FHIR Module	Normative Status
http://hl7.org/fhir/StructureDefinition/QuestionnaireResponse	HL7 International	trial-use

QuestionnaireResponse	I		DomainResource	Element id QuestionnaireResponse Short description A structured set of questions and their answers Alternate names Form, QuestionnaireAnswers Definition A structured set of questions and their answers. The questions are ordered and grouped into coherent subsets, corresponding to the structure of the grouping of the questionnaire being responded to. Comments The QuestionnaireResponse contains enough information about the questions asked and their organization that it can be interpreted somewhat independently from the Questionnaire it is based on. I.e. You don't need access to the Questionnaire in order to extract basic information from a QuestionnaireResponse. Data type DomainResource Constraints dom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources `contained.contained.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-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-6: A resource should have narrative for robust management text.`div`.exists() dom-5: If a resource is contained in another resource, it SHALL NOT have a security label `contained.meta.security.empty()` Mappings rim: Entity. Role, or Act workflow: Event rim: Observation[moodCode=EVN]
id	Σ	0..1	string	There are no (further) constraints on this element Element id QuestionnaireResponse.id Short description Logical id of this artifact Definition The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes. 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. Data type string
meta	Σ	0..1	Meta	There are no (further) constraints on this element Element id QuestionnaireResponse.meta Short description Metadata about the resource 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. Data type Meta Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a rim: N/A
implicitRules	Σ ?!	0..1	uri	There are no (further) constraints on this element Element id QuestionnaireResponse.implicitRules Short description A set of rules under which this content was created 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. 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. Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
language		0..1	codeBinding	There are no (further) constraints on this element Element id QuestionnaireResponse.language Short description Language of the resource content Definition The base language in which the resource is written. 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). Data type code Binding A human language. CommonLanguages (preferred) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
text		0..1	Narrative	There are no (further) constraints on this element Element id QuestionnaireResponse.text Short description Text summary of the resource, for human interpretation Alternate names narrative, html, xhtml, display 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. 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. Data type Narrative Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a rim: N/A rim: Act.text?
contained		0..*	Resource	There are no (further) constraints on this element Element id QuestionnaireResponse.contained Short description Contained, inline Resources Alternate names inline resources, anonymous resources, contained resources 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. 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. Data type Resource Mappings rim: Entity. Role, or Act rim: N/A
extension	I	0..*	Extension	There are no (further) constraints on this element Element id QuestionnaireResponse.extension Short description Additional content defined by implementations Alternate names extensions, user content Definition 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. 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. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints 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()` Mappings rim: n/a rim: N/A
modifierExtension	?! I	0..*	Extension	There are no (further) constraints on this element Element id QuestionnaireResponse.modifierExtension Short description Extensions that cannot be ignored Alternate names extensions, user content 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). 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. 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. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints 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()` Mappings rim: n/a rim: N/A
identifier	Σ	0..1	Identifier	Element id QuestionnaireResponse.identifier Short description Unique id for this set of answers Definition A business identifier assigned to a particular completed (or partially completed) questionnaire. Requirements Used for tracking, registration and other business purposes. Data type Identifier Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CX / EI (occasionally, more often EI maps to a resource id or a URL) rim: II - The Identifier class is a little looser than the v3 type II because it allows URIs as well as registered OIDs or GUIDs. Also maps to Role[classCode=IDENT] servd: Identifier workflow: Event.identifier w5: FiveWs.identifier rim: .id
basedOn	Σ I	0..*	Reference(CarePlan \| ServiceRequest)	Element id QuestionnaireResponse.basedOn Short description Request fulfilled by this QuestionnaireResponse Alternate names order Definition The order, proposal or plan that is fulfilled in whole or in part by this QuestionnaireResponse. For example, a ServiceRequest seeking an intake assessment or a decision support recommendation to assess for post-partum depression. Requirements Supports traceability of responsibility for the action and allows linkage of an action to the recommendations acted upon. Comments References SHALL be a reference to an actual FHIR resource, and SHALL be resolveable (allowing for access control, temporary unavailability, etc.). Resolution can be either by retrieval from the URL, or, where applicable by resource type, by treating an absolute reference as a canonical URL and looking it up in a local registry/repository. Data type Reference(CarePlan \| ServiceRequest) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ref-1: SHALL have a contained resource if a local reference is provided `reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids'))` Mappings rim: n/a rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity) workflow: Event.basedOn rim: .outboundRelationship[typeCode=FLFS].target
partOf	Σ I	0..*	Reference(Observation \| Procedure)	Element id QuestionnaireResponse.partOf Short description Part of this action Definition A procedure or observation that this questionnaire was performed as part of the execution of. For example, the surgery a checklist was executed as part of. Comments Composition of questionnaire responses will be handled by the parent questionnaire having answers that reference the child questionnaire. For relationships to referrals, and other types of requests, use basedOn. Data type Reference(Observation \| Procedure) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ref-1: SHALL have a contained resource if a local reference is provided `reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids'))` Mappings rim: n/a rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity) workflow: Event.partOf rim: .inboundRelationship[typeCode=COMP].source[moodCode=EVN]
questionnaire	Σ	0..1	canonical(Questionnaire)	Element id QuestionnaireResponse.questionnaire Short description Form being answered Alternate names Form Definition The Questionnaire that defines and organizes the questions for which answers are being provided. Requirements Needed to allow editing of the questionnaire response in a manner that enforces the constraints of the original form. Comments If a QuestionnaireResponse references a Questionnaire, then the QuestionnaireResponse structure must be consistent with the Questionnaire (i.e. questions must be organized into the same groups, nested questions must still be nested, etc.). Data type canonical(Questionnaire) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a workflow: Event.instantiates rim: ./outboundRelationship[typeCode=INST]/target[classCode=OBS, moodCode=DEFN]
status	Σ ?!	1..1	codeBinding	Element id QuestionnaireResponse.status Short description in-progress \| completed \| amended \| entered-in-error \| stopped Definition The position of the questionnaire response within its overall lifecycle. Requirements The information on Questionnaire resources may possibly be gathered during multiple sessions and altered after considered being finished. Comments This element is labeled as a modifier because the status contains codes that mark the resource as not currently valid. Data type code Binding Lifecycle status of the questionnaire response. QuestionnaireResponseStatus (required) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a workflow: Event.status w5: FiveWs.status rim: .statusCode (also whether there's a revisionControlAct - and possibly mood to distinguish "in-progress" from "published)
subject	Σ I	0..1	Reference(Resource)	Element id QuestionnaireResponse.subject Short description The subject of the questions Alternate names Patient, Focus Definition The subject of the questionnaire response. This could be a patient, organization, practitioner, device, etc. This is who/what the answers apply to, but is not necessarily the source of information. Requirements Allows linking the answers to the individual the answers describe. May also affect access control. Comments If the Questionnaire declared a subjectType, the resource pointed to by this element must be an instance of one of the listed types. Data type Reference(Resource) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ref-1: SHALL have a contained resource if a local reference is provided `reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids'))` Mappings rim: n/a rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity) workflow: Event.subject w5: FiveWs.subject[x] rim: .participation[typeCode=SBJ].role w5: FiveWs.subject
encounter	Σ I	0..1	Reference(Encounter)	Element id QuestionnaireResponse.encounter Short description Encounter created as part of Definition The Encounter during which this questionnaire response was created or to which the creation of this record is tightly associated. Requirements Provides context for the information that was captured. May also affect access control. Comments This will typically be the encounter the event occurred within, but some activities may be initiated prior to or after the official completion of an encounter but still be tied to the context of the encounter. A questionnaire that was initiated during an encounter but not fully completed during the encounter would still generally be associated with the encounter. Data type Reference(Encounter) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ref-1: SHALL have a contained resource if a local reference is provided `reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids'))` Mappings rim: n/a rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity) workflow: Event.encounter w5: FiveWs.context rim: .inboundRelationship(typeCode=COMP].source[classCode<=PCPR, moodCode=EVN]
authored	Σ	0..1	dateTime	Element id QuestionnaireResponse.authored Short description Date the answers were gathered Alternate names Date Created, Date published, Date Issued, Date updated Definition The date and/or time that this set of answers were last changed. Requirements Clinicians need to be able to check the date that the information in the questionnaire was collected, to derive the context of the answers. Comments May be different from the lastUpdateTime of the resource itself, because that reflects when the data was known to the server, not when the data was captured. This element is optional to allow for systems that might not know the value, however it SHOULD be populated if possible. Data type dateTime Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a workflow: Event.occurrence[x] w5: FiveWs.recorded rim: .participation[typeCode=AUT].time
author	Σ I	0..1	Reference(Device \| Practitioner \| PractitionerRole \| Patient \| RelatedPerson \| Organization)	Element id QuestionnaireResponse.author Short description Person who received and recorded the answers Alternate names Laboratory, Service, Practitioner, Department, Company, Performer Definition Person who received the answers to the questions in the QuestionnaireResponse and recorded them in the system. Requirements Need to know who interpreted the subject's answers to the questions in the questionnaire, and selected the appropriate options for answers. Comments Mapping a subject's answers to multiple choice options and determining what to put in the textual answer is a matter of interpretation. Authoring by device would indicate that some portion of the questionnaire had been auto-populated. Data type Reference(Device \| Practitioner \| PractitionerRole \| Patient \| RelatedPerson \| Organization) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ref-1: SHALL have a contained resource if a local reference is provided `reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids'))` Mappings rim: n/a rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity) workflow: Event.performer w5: FiveWs.author rim: .participation[typeCode=AUT].role
source	Σ I	0..1	Reference(Patient \| Practitioner \| PractitionerRole \| RelatedPerson)	Element id QuestionnaireResponse.source Short description The person who answered the questions Definition The person who answered the questions about the subject. Requirements When answering questions about a subject that is minor, incapable of answering or an animal, another human source may answer the questions. Comments If not specified, no inference can be made about who provided the data. Data type Reference(Patient \| Practitioner \| PractitionerRole \| RelatedPerson) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ref-1: SHALL have a contained resource if a local reference is provided `reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids'))` Mappings rim: n/a rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity) w5: FiveWs.source rim: .participation[typeCode=INF].role
item	I	0..*	BackboneElement	Element id QuestionnaireResponse.item Short description Groups and questions Definition A group or question item from the original questionnaire for which answers are provided. Comments Groups cannot have answers and therefore must nest directly within item. When dealing with questions, nesting must occur within each answer because some questions may have multiple answers (and the nesting occurs for each answer). Data type BackboneElement Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` qrs-1: Nested item can't be beneath both item and answer `(answer.exists() and item.exists()).not()` Mappings rim: n/a rim: .outboundRelationship[typeCode=COMP].target[classCode=OBS, moodCode=EVN]
id		0..1	string	There are no (further) constraints on this element Element id QuestionnaireResponse.item.id Short description Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. Data type string Mappings rim: n/a
extension	I	0..*	Extension	There are no (further) constraints on this element Element id QuestionnaireResponse.item.extension Short description Additional content defined by implementations Alternate names extensions, user content 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. 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. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints 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()` Mappings rim: n/a rim: N/A
modifierExtension	Σ ?! I	0..*	Extension	There are no (further) constraints on this element Element id QuestionnaireResponse.item.modifierExtension Short description Extensions that cannot be ignored even if unrecognized Alternate names extensions, user content, modifiers 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). 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. 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. Data type Extension Constraints 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()` Mappings rim: n/a rim: N/A
linkId		1..1	string	Element id QuestionnaireResponse.item.linkId Short description Pointer to specific item from Questionnaire Definition The item from the Questionnaire that corresponds to this item in the QuestionnaireResponse resource. Requirements Items can repeat in the answers, so a direct 1..1 correspondence by position might not exist - requiring correspondence by identifier. Comments Note that FHIR strings SHALL NOT exceed 1MB in size Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a rim: .outboundRelationship[typeCode=DEFN].target[classCode=OBS, moodCode=DEFN].id
definition		0..1	uri	Element id QuestionnaireResponse.item.definition Short description ElementDefinition - details for the item Definition A reference to an ElementDefinition that provides the details for the item. Requirements A common pattern is to define a set of data elements, and then build multiple different questionnaires for different circumstances to gather the data. This element provides traceability to the common definition. Comments The ElementDefinition must be in a StructureDefinition, and must have a fragment identifier that identifies the specific data element by its id (Element.id). E.g. http://hl7.org/fhir/StructureDefinition/Observation#Observation.value[x]. There is no need for this element if the item pointed to by the linkId has a definition listed. Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a rim: .outboundRelationship[typeCode=DEFN].target[classCode=OBS, moodCode=DEFN].code
text		0..1	string	Element id QuestionnaireResponse.item.text Short description Name for group or question text Definition Text that is displayed above the contents of the group or as the text of the question being answered. Requirements Allows the questionnaire response to be read without access to the questionnaire. Comments Note that FHIR strings SHALL NOT exceed 1MB in size Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a rim: .text
answer		0..*	BackboneElement	Element id QuestionnaireResponse.item.answer Short description The response(s) to the question Definition The respondent's answer(s) to the question. Comments The value is nested because we cannot have a repeating structure that has variable type. Data type BackboneElement Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a rim: .value[type=LIST_ANY]
id		0..1	string	There are no (further) constraints on this element Element id QuestionnaireResponse.item.answer.id Short description Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. Data type string Mappings rim: n/a
extension	I	0..*	Extension	There are no (further) constraints on this element Element id QuestionnaireResponse.item.answer.extension Short description Additional content defined by implementations Alternate names extensions, user content 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. 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. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints 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()` Mappings rim: n/a rim: N/A
modifierExtension	Σ ?! I	0..*	Extension	There are no (further) constraints on this element Element id QuestionnaireResponse.item.answer.modifierExtension Short description Extensions that cannot be ignored even if unrecognized Alternate names extensions, user content, modifiers 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). 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. 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. Data type Extension Constraints 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()` Mappings rim: n/a rim: N/A
value[x]		0..1		Element id QuestionnaireResponse.item.answer.value[x] Short description Single-valued answer to the question Definition The answer (or one of the answers) provided by the respondent to the question. Requirements Ability to retain a single-valued answer to a question. Comments More complex structures (Attachment, Resource and Quantity) will typically be limited to electronic forms that can expose an appropriate user interface to capture the components and enforce the constraints of a complex data type. Additional complex types can be introduced through extensions. Must match the datatype specified by Questionnaire.item.type in the corresponding Questionnaire. Binding Code indicating the response provided for a question. QuestionnaireAnswerCodes (example) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a rim: .item
valueBoolean			boolean	Data type boolean
valueDecimal			decimal	Data type decimal
valueInteger			integer	Data type integer
valueDate			date	Data type date
valueDateTime			dateTime	Data type dateTime
valueTime			time	Data type time
valueString			string	Data type string
valueUri			uri	Data type uri
valueAttachment			Attachment	Data type Attachment
valueCoding			Coding	Data type Coding
valueQuantity			Quantity	Data type Quantity
valueReference			Reference(Resource)	Data type Reference(Resource)
item		0..*	see (item)	There are no (further) constraints on this element Element id QuestionnaireResponse.item.answer.item Short description Nested groups and questions Definition Nested groups and/or questions found within this particular answer. Requirements It is useful to have "sub-questions", questions which normally appear when certain answers are given and which collect additional details. Mappings rim: .outboundRelationship[typeCode=COMP].target[classCode=OBS, moodCode=EVN]
item		0..*	see (item)	There are no (further) constraints on this element Element id QuestionnaireResponse.item.item Short description Nested questionnaire response items Definition Questions or sub-groups nested beneath a question or group. Requirements Reports can consist of complex nested groups. Mappings rim: .outboundRelationship[typeCode=COMP].target[classCode=OBS, moodCode=EVN]

FHIR	MDS	HL7v2
QuestionnaireResponse	Record of Discussion	CON segments
QuestionnaireResponse.item.answer	RoD questions with appropriate linkId: RoD - Patient category, Test type, RoD - Research opt out reason, RoD - Remote consent, RoD - Recording clinician, RoD - Responsible clinician, RoD - Patient choice status, RoD - Has research participation been discussed, RoD - Signature	CON (for OML, included in RoD, referenced from NTE-3)