This page is part of the FHIR Specification (v4.0.1: R4 - Mixed Normative and STU) in it's permanent home (it will always be available at this URL). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions . Page versions: R5 R4B R4
Clinical Decision Support Work Group | Maturity Level: 0 | Trial Use | Security Category: Business | Compartments: Not linked to any defined compartments |
The Evidence resource describes the conditional state (population and any exposures being compared within the population) and outcome (if specified) that the knowledge (evidence, assertion, recommendation) is about.
The scope of the Evidence resource is to describe the conditional state (population and exposures being considered or compared within a population) with or without the outcomes that knowledge (evidence, assertion, recommendation) is about. The Evidence resource is a commonly bundled series of evidence variables from the "PICO" specification of medical knowledge: Population - the population within which exposures and outcomes are being considered Intervention - the conditional state or exposure state being described for which one is expressing the risk of or effect on an outcome Comparison - the alternative conditional state or alternative exposure state when one is comparing states for the effect on an outcome Outcome - the result or effect of an intervention or exposure in a population PICO (and its variants like PECO or PICOT) is a universal acronym used in evidence-based medicine communities to clearly express research questions and evidence findings. The Evidence resource allows expression of the higher-order concept for recommendations in healthcare where multiple outcomes are considered, and the higher-order concept/combination for framing research questions.
The Evidence resource references the EvidenceVariable resource two or more times to clearly specify the relationship among evidence variable concepts in framing a research question, evidence assertion, or recommendation.
Structure
Name | Flags | Card. | Type | Description & Constraints |
---|---|---|---|---|
Evidence | ITU | DomainResource | A research context or question + Warning: Name should be usable as an identifier for the module by machine processing applications such as code generation Elements defined in Ancestors: id, meta, implicitRules, language, text, contained, extension, modifierExtension | |
url | Σ | 0..1 | uri | Canonical identifier for this evidence, represented as a URI (globally unique) |
identifier | Σ | 0..* | Identifier | Additional identifier for the evidence |
version | Σ | 0..1 | string | Business version of the evidence |
name | ΣI | 0..1 | string | Name for this evidence (computer friendly) |
title | Σ | 0..1 | string | Name for this evidence (human friendly) |
shortTitle | 0..1 | string | Title for use in informal contexts | |
subtitle | 0..1 | string | Subordinate title of the Evidence | |
status | ?!Σ | 1..1 | code | draft | active | retired | unknown PublicationStatus (Required) |
date | Σ | 0..1 | dateTime | Date last changed |
publisher | Σ | 0..1 | string | Name of the publisher (organization or individual) |
contact | Σ | 0..* | ContactDetail | Contact details for the publisher |
description | Σ | 0..1 | markdown | Natural language description of the evidence |
note | 0..* | Annotation | Used for footnotes or explanatory notes | |
useContext | Σ | 0..* | UsageContext | The context that the content is intended to support |
jurisdiction | Σ | 0..* | CodeableConcept | Intended jurisdiction for evidence (if applicable) Jurisdiction (Extensible) |
copyright | 0..1 | markdown | Use and/or publishing restrictions | |
approvalDate | 0..1 | date | When the evidence was approved by publisher | |
lastReviewDate | 0..1 | date | When the evidence was last reviewed | |
effectivePeriod | Σ | 0..1 | Period | When the evidence is expected to be used |
topic | 0..* | CodeableConcept | The category of the Evidence, such as Education, Treatment, Assessment, etc. DefinitionTopic (Example) | |
author | 0..* | ContactDetail | Who authored the content | |
editor | 0..* | ContactDetail | Who edited the content | |
reviewer | 0..* | ContactDetail | Who reviewed the content | |
endorser | 0..* | ContactDetail | Who endorsed the content | |
relatedArtifact | 0..* | RelatedArtifact | Additional documentation, citations, etc. | |
exposureBackground | Σ | 1..1 | Reference(EvidenceVariable) | What population? |
exposureVariant | Σ | 0..* | Reference(EvidenceVariable) | What exposure? |
outcome | Σ | 0..* | Reference(EvidenceVariable) | What outcome? |
Documentation for this format |
UML Diagram (Legend)
XML Template
<Evidence xmlns="http://hl7.org/fhir"> <!-- from Resource: id, meta, implicitRules, and language --> <!-- from DomainResource: text, contained, extension, and modifierExtension --> <url value="[uri]"/><!-- 0..1 Canonical identifier for this evidence, represented as a URI (globally unique) --> <identifier><!-- 0..* Identifier Additional identifier for the evidence --></identifier> <version value="[string]"/><!-- 0..1 Business version of the evidence --> <name value="[string]"/><!-- 0..1 Name for this evidence (computer friendly) --> <title value="[string]"/><!-- 0..1 Name for this evidence (human friendly) --> <shortTitle value="[string]"/><!-- 0..1 Title for use in informal contexts --> <subtitle value="[string]"/><!-- 0..1 Subordinate title of the Evidence --> <status value="[code]"/><!-- 1..1 draft | active | retired | unknown --> <date value="[dateTime]"/><!-- 0..1 Date last changed --> <publisher value="[string]"/><!-- 0..1 Name of the publisher (organization or individual) --> <contact><!-- 0..* ContactDetail Contact details for the publisher --></contact> <description value="[markdown]"/><!-- 0..1 Natural language description of the evidence --> <note><!-- 0..* Annotation Used for footnotes or explanatory notes --></note> <useContext><!-- 0..* UsageContext The context that the content is intended to support --></useContext> <jurisdiction><!-- 0..* CodeableConcept Intended jurisdiction for evidence (if applicable) --></jurisdiction> <copyright value="[markdown]"/><!-- 0..1 Use and/or publishing restrictions --> <approvalDate value="[date]"/><!-- 0..1 When the evidence was approved by publisher --> <lastReviewDate value="[date]"/><!-- 0..1 When the evidence was last reviewed --> <effectivePeriod><!-- 0..1 Period When the evidence is expected to be used --></effectivePeriod> <topic><!-- 0..* CodeableConcept The category of the Evidence, such as Education, Treatment, Assessment, etc. --></topic> <author><!-- 0..* ContactDetail Who authored the content --></author> <editor><!-- 0..* ContactDetail Who edited the content --></editor> <reviewer><!-- 0..* ContactDetail Who reviewed the content --></reviewer> <endorser><!-- 0..* ContactDetail Who endorsed the content --></endorser> <relatedArtifact><!-- 0..* RelatedArtifact Additional documentation, citations, etc. --></relatedArtifact> <exposureBackground><!-- 1..1 Reference(EvidenceVariable) What population? --></exposureBackground> <exposureVariant><!-- 0..* Reference(EvidenceVariable) What exposure? --></exposureVariant> <outcome><!-- 0..* Reference(EvidenceVariable) What outcome? --></outcome> </Evidence>
JSON Template
{ "resourceType" : "Evidence", // from Resource: id, meta, implicitRules, and language // from DomainResource: text, contained, extension, and modifierExtension "url" : "<uri>", // Canonical identifier for this evidence, represented as a URI (globally unique) "identifier" : [{ Identifier }], // Additional identifier for the evidence "version" : "<string>", // Business version of the evidence "name" : "<string>", // C? Name for this evidence (computer friendly) "title" : "<string>", // Name for this evidence (human friendly) "shortTitle" : "<string>", // Title for use in informal contexts "subtitle" : "<string>", // Subordinate title of the Evidence "status" : "<code>", // R! draft | active | retired | unknown "date" : "<dateTime>", // Date last changed "publisher" : "<string>", // Name of the publisher (organization or individual) "contact" : [{ ContactDetail }], // Contact details for the publisher "description" : "<markdown>", // Natural language description of the evidence "note" : [{ Annotation }], // Used for footnotes or explanatory notes "useContext" : [{ UsageContext }], // The context that the content is intended to support "jurisdiction" : [{ CodeableConcept }], // Intended jurisdiction for evidence (if applicable) "copyright" : "<markdown>", // Use and/or publishing restrictions "approvalDate" : "<date>", // When the evidence was approved by publisher "lastReviewDate" : "<date>", // When the evidence was last reviewed "effectivePeriod" : { Period }, // When the evidence is expected to be used "topic" : [{ CodeableConcept }], // The category of the Evidence, such as Education, Treatment, Assessment, etc. "author" : [{ ContactDetail }], // Who authored the content "editor" : [{ ContactDetail }], // Who edited the content "reviewer" : [{ ContactDetail }], // Who reviewed the content "endorser" : [{ ContactDetail }], // Who endorsed the content "relatedArtifact" : [{ RelatedArtifact }], // Additional documentation, citations, etc. "exposureBackground" : { Reference(EvidenceVariable) }, // R! What population? "exposureVariant" : [{ Reference(EvidenceVariable) }], // What exposure? "outcome" : [{ Reference(EvidenceVariable) }] // What outcome? }
Turtle Template
@prefix fhir: <http://hl7.org/fhir/> . [ a fhir:Evidence; fhir:nodeRole fhir:treeRoot; # if this is the parser root # from Resource: .id, .meta, .implicitRules, and .language # from DomainResource: .text, .contained, .extension, and .modifierExtension fhir:Evidence.url [ uri ]; # 0..1 Canonical identifier for this evidence, represented as a URI (globally unique) fhir:Evidence.identifier [ Identifier ], ... ; # 0..* Additional identifier for the evidence fhir:Evidence.version [ string ]; # 0..1 Business version of the evidence fhir:Evidence.name [ string ]; # 0..1 Name for this evidence (computer friendly) fhir:Evidence.title [ string ]; # 0..1 Name for this evidence (human friendly) fhir:Evidence.shortTitle [ string ]; # 0..1 Title for use in informal contexts fhir:Evidence.subtitle [ string ]; # 0..1 Subordinate title of the Evidence fhir:Evidence.status [ code ]; # 1..1 draft | active | retired | unknown fhir:Evidence.date [ dateTime ]; # 0..1 Date last changed fhir:Evidence.publisher [ string ]; # 0..1 Name of the publisher (organization or individual) fhir:Evidence.contact [ ContactDetail ], ... ; # 0..* Contact details for the publisher fhir:Evidence.description [ markdown ]; # 0..1 Natural language description of the evidence fhir:Evidence.note [ Annotation ], ... ; # 0..* Used for footnotes or explanatory notes fhir:Evidence.useContext [ UsageContext ], ... ; # 0..* The context that the content is intended to support fhir:Evidence.jurisdiction [ CodeableConcept ], ... ; # 0..* Intended jurisdiction for evidence (if applicable) fhir:Evidence.copyright [ markdown ]; # 0..1 Use and/or publishing restrictions fhir:Evidence.approvalDate [ date ]; # 0..1 When the evidence was approved by publisher fhir:Evidence.lastReviewDate [ date ]; # 0..1 When the evidence was last reviewed fhir:Evidence.effectivePeriod [ Period ]; # 0..1 When the evidence is expected to be used fhir:Evidence.topic [ CodeableConcept ], ... ; # 0..* The category of the Evidence, such as Education, Treatment, Assessment, etc. fhir:Evidence.author [ ContactDetail ], ... ; # 0..* Who authored the content fhir:Evidence.editor [ ContactDetail ], ... ; # 0..* Who edited the content fhir:Evidence.reviewer [ ContactDetail ], ... ; # 0..* Who reviewed the content fhir:Evidence.endorser [ ContactDetail ], ... ; # 0..* Who endorsed the content fhir:Evidence.relatedArtifact [ RelatedArtifact ], ... ; # 0..* Additional documentation, citations, etc. fhir:Evidence.exposureBackground [ Reference(EvidenceVariable) ]; # 1..1 What population? fhir:Evidence.exposureVariant [ Reference(EvidenceVariable) ], ... ; # 0..* What exposure? fhir:Evidence.outcome [ Reference(EvidenceVariable) ], ... ; # 0..* What outcome? ]
Structure
Name | Flags | Card. | Type | Description & Constraints |
---|---|---|---|---|
Evidence | ITU | DomainResource | A research context or question + Warning: Name should be usable as an identifier for the module by machine processing applications such as code generation Elements defined in Ancestors: id, meta, implicitRules, language, text, contained, extension, modifierExtension | |
url | Σ | 0..1 | uri | Canonical identifier for this evidence, represented as a URI (globally unique) |
identifier | Σ | 0..* | Identifier | Additional identifier for the evidence |
version | Σ | 0..1 | string | Business version of the evidence |
name | ΣI | 0..1 | string | Name for this evidence (computer friendly) |
title | Σ | 0..1 | string | Name for this evidence (human friendly) |
shortTitle | 0..1 | string | Title for use in informal contexts | |
subtitle | 0..1 | string | Subordinate title of the Evidence | |
status | ?!Σ | 1..1 | code | draft | active | retired | unknown PublicationStatus (Required) |
date | Σ | 0..1 | dateTime | Date last changed |
publisher | Σ | 0..1 | string | Name of the publisher (organization or individual) |
contact | Σ | 0..* | ContactDetail | Contact details for the publisher |
description | Σ | 0..1 | markdown | Natural language description of the evidence |
note | 0..* | Annotation | Used for footnotes or explanatory notes | |
useContext | Σ | 0..* | UsageContext | The context that the content is intended to support |
jurisdiction | Σ | 0..* | CodeableConcept | Intended jurisdiction for evidence (if applicable) Jurisdiction (Extensible) |
copyright | 0..1 | markdown | Use and/or publishing restrictions | |
approvalDate | 0..1 | date | When the evidence was approved by publisher | |
lastReviewDate | 0..1 | date | When the evidence was last reviewed | |
effectivePeriod | Σ | 0..1 | Period | When the evidence is expected to be used |
topic | 0..* | CodeableConcept | The category of the Evidence, such as Education, Treatment, Assessment, etc. DefinitionTopic (Example) | |
author | 0..* | ContactDetail | Who authored the content | |
editor | 0..* | ContactDetail | Who edited the content | |
reviewer | 0..* | ContactDetail | Who reviewed the content | |
endorser | 0..* | ContactDetail | Who endorsed the content | |
relatedArtifact | 0..* | RelatedArtifact | Additional documentation, citations, etc. | |
exposureBackground | Σ | 1..1 | Reference(EvidenceVariable) | What population? |
exposureVariant | Σ | 0..* | Reference(EvidenceVariable) | What exposure? |
outcome | Σ | 0..* | Reference(EvidenceVariable) | What outcome? |
Documentation for this format |
XML Template
<Evidence xmlns="http://hl7.org/fhir"> <!-- from Resource: id, meta, implicitRules, and language --> <!-- from DomainResource: text, contained, extension, and modifierExtension --> <url value="[uri]"/><!-- 0..1 Canonical identifier for this evidence, represented as a URI (globally unique) --> <identifier><!-- 0..* Identifier Additional identifier for the evidence --></identifier> <version value="[string]"/><!-- 0..1 Business version of the evidence --> <name value="[string]"/><!-- 0..1 Name for this evidence (computer friendly) --> <title value="[string]"/><!-- 0..1 Name for this evidence (human friendly) --> <shortTitle value="[string]"/><!-- 0..1 Title for use in informal contexts --> <subtitle value="[string]"/><!-- 0..1 Subordinate title of the Evidence --> <status value="[code]"/><!-- 1..1 draft | active | retired | unknown --> <date value="[dateTime]"/><!-- 0..1 Date last changed --> <publisher value="[string]"/><!-- 0..1 Name of the publisher (organization or individual) --> <contact><!-- 0..* ContactDetail Contact details for the publisher --></contact> <description value="[markdown]"/><!-- 0..1 Natural language description of the evidence --> <note><!-- 0..* Annotation Used for footnotes or explanatory notes --></note> <useContext><!-- 0..* UsageContext The context that the content is intended to support --></useContext> <jurisdiction><!-- 0..* CodeableConcept Intended jurisdiction for evidence (if applicable) --></jurisdiction> <copyright value="[markdown]"/><!-- 0..1 Use and/or publishing restrictions --> <approvalDate value="[date]"/><!-- 0..1 When the evidence was approved by publisher --> <lastReviewDate value="[date]"/><!-- 0..1 When the evidence was last reviewed --> <effectivePeriod><!-- 0..1 Period When the evidence is expected to be used --></effectivePeriod> <topic><!-- 0..* CodeableConcept The category of the Evidence, such as Education, Treatment, Assessment, etc. --></topic> <author><!-- 0..* ContactDetail Who authored the content --></author> <editor><!-- 0..* ContactDetail Who edited the content --></editor> <reviewer><!-- 0..* ContactDetail Who reviewed the content --></reviewer> <endorser><!-- 0..* ContactDetail Who endorsed the content --></endorser> <relatedArtifact><!-- 0..* RelatedArtifact Additional documentation, citations, etc. --></relatedArtifact> <exposureBackground><!-- 1..1 Reference(EvidenceVariable) What population? --></exposureBackground> <exposureVariant><!-- 0..* Reference(EvidenceVariable) What exposure? --></exposureVariant> <outcome><!-- 0..* Reference(EvidenceVariable) What outcome? --></outcome> </Evidence>
JSON Template
{ "resourceType" : "Evidence", // from Resource: id, meta, implicitRules, and language // from DomainResource: text, contained, extension, and modifierExtension "url" : "<uri>", // Canonical identifier for this evidence, represented as a URI (globally unique) "identifier" : [{ Identifier }], // Additional identifier for the evidence "version" : "<string>", // Business version of the evidence "name" : "<string>", // C? Name for this evidence (computer friendly) "title" : "<string>", // Name for this evidence (human friendly) "shortTitle" : "<string>", // Title for use in informal contexts "subtitle" : "<string>", // Subordinate title of the Evidence "status" : "<code>", // R! draft | active | retired | unknown "date" : "<dateTime>", // Date last changed "publisher" : "<string>", // Name of the publisher (organization or individual) "contact" : [{ ContactDetail }], // Contact details for the publisher "description" : "<markdown>", // Natural language description of the evidence "note" : [{ Annotation }], // Used for footnotes or explanatory notes "useContext" : [{ UsageContext }], // The context that the content is intended to support "jurisdiction" : [{ CodeableConcept }], // Intended jurisdiction for evidence (if applicable) "copyright" : "<markdown>", // Use and/or publishing restrictions "approvalDate" : "<date>", // When the evidence was approved by publisher "lastReviewDate" : "<date>", // When the evidence was last reviewed "effectivePeriod" : { Period }, // When the evidence is expected to be used "topic" : [{ CodeableConcept }], // The category of the Evidence, such as Education, Treatment, Assessment, etc. "author" : [{ ContactDetail }], // Who authored the content "editor" : [{ ContactDetail }], // Who edited the content "reviewer" : [{ ContactDetail }], // Who reviewed the content "endorser" : [{ ContactDetail }], // Who endorsed the content "relatedArtifact" : [{ RelatedArtifact }], // Additional documentation, citations, etc. "exposureBackground" : { Reference(EvidenceVariable) }, // R! What population? "exposureVariant" : [{ Reference(EvidenceVariable) }], // What exposure? "outcome" : [{ Reference(EvidenceVariable) }] // What outcome? }
Turtle Template
@prefix fhir: <http://hl7.org/fhir/> . [ a fhir:Evidence; fhir:nodeRole fhir:treeRoot; # if this is the parser root # from Resource: .id, .meta, .implicitRules, and .language # from DomainResource: .text, .contained, .extension, and .modifierExtension fhir:Evidence.url [ uri ]; # 0..1 Canonical identifier for this evidence, represented as a URI (globally unique) fhir:Evidence.identifier [ Identifier ], ... ; # 0..* Additional identifier for the evidence fhir:Evidence.version [ string ]; # 0..1 Business version of the evidence fhir:Evidence.name [ string ]; # 0..1 Name for this evidence (computer friendly) fhir:Evidence.title [ string ]; # 0..1 Name for this evidence (human friendly) fhir:Evidence.shortTitle [ string ]; # 0..1 Title for use in informal contexts fhir:Evidence.subtitle [ string ]; # 0..1 Subordinate title of the Evidence fhir:Evidence.status [ code ]; # 1..1 draft | active | retired | unknown fhir:Evidence.date [ dateTime ]; # 0..1 Date last changed fhir:Evidence.publisher [ string ]; # 0..1 Name of the publisher (organization or individual) fhir:Evidence.contact [ ContactDetail ], ... ; # 0..* Contact details for the publisher fhir:Evidence.description [ markdown ]; # 0..1 Natural language description of the evidence fhir:Evidence.note [ Annotation ], ... ; # 0..* Used for footnotes or explanatory notes fhir:Evidence.useContext [ UsageContext ], ... ; # 0..* The context that the content is intended to support fhir:Evidence.jurisdiction [ CodeableConcept ], ... ; # 0..* Intended jurisdiction for evidence (if applicable) fhir:Evidence.copyright [ markdown ]; # 0..1 Use and/or publishing restrictions fhir:Evidence.approvalDate [ date ]; # 0..1 When the evidence was approved by publisher fhir:Evidence.lastReviewDate [ date ]; # 0..1 When the evidence was last reviewed fhir:Evidence.effectivePeriod [ Period ]; # 0..1 When the evidence is expected to be used fhir:Evidence.topic [ CodeableConcept ], ... ; # 0..* The category of the Evidence, such as Education, Treatment, Assessment, etc. fhir:Evidence.author [ ContactDetail ], ... ; # 0..* Who authored the content fhir:Evidence.editor [ ContactDetail ], ... ; # 0..* Who edited the content fhir:Evidence.reviewer [ ContactDetail ], ... ; # 0..* Who reviewed the content fhir:Evidence.endorser [ ContactDetail ], ... ; # 0..* Who endorsed the content fhir:Evidence.relatedArtifact [ RelatedArtifact ], ... ; # 0..* Additional documentation, citations, etc. fhir:Evidence.exposureBackground [ Reference(EvidenceVariable) ]; # 1..1 What population? fhir:Evidence.exposureVariant [ Reference(EvidenceVariable) ], ... ; # 0..* What exposure? fhir:Evidence.outcome [ Reference(EvidenceVariable) ], ... ; # 0..* What outcome? ]
See the Profiles & Extensions and the alternate definitions: Master Definition XML + JSON, XML Schema/Schematron + JSON Schema, ShEx (for Turtle) + see the extensions & the dependency analysis
Path | Definition | Type | Reference |
---|---|---|---|
Evidence.status | The lifecycle status of an artifact. | Required | PublicationStatus |
Evidence.jurisdiction | Countries and regions within which this artifact is targeted for use. | Extensible | Jurisdiction ValueSet |
Evidence.topic | High-level categorization of the definition, used for searching, sorting, and filtering. | Example | DefinitionTopic |
id | Level | Location | Description | Expression |
evi-0 | Warning | (base) | Name should be usable as an identifier for the module by machine processing applications such as code generation | name.matches('[A-Z]([A-Za-z0-9_]){0,254}') |
Search parameters for this resource. The common parameters also apply. See Searching for more information about searching in REST, messaging, and services.
Name | Type | Description | Expression | In Common |
composed-of | reference | What resource is being referenced | Evidence.relatedArtifact.where(type='composed-of').resource (Any) | |
context | token | A use context assigned to the evidence | (Evidence.useContext.value as CodeableConcept) | |
context-quantity | quantity | A quantity- or range-valued use context assigned to the evidence | (Evidence.useContext.value as Quantity) | (Evidence.useContext.value as Range) | |
context-type | token | A type of use context assigned to the evidence | Evidence.useContext.code | |
context-type-quantity | composite | A use context type and quantity- or range-based value assigned to the evidence | On Evidence.useContext: context-type: code context-quantity: value.as(Quantity) | value.as(Range) | |
context-type-value | composite | A use context type and value assigned to the evidence | On Evidence.useContext: context-type: code context: value.as(CodeableConcept) | |
date | date | The evidence publication date | Evidence.date | |
depends-on | reference | What resource is being referenced | Evidence.relatedArtifact.where(type='depends-on').resource (Any) | |
derived-from | reference | What resource is being referenced | Evidence.relatedArtifact.where(type='derived-from').resource (Any) | |
description | string | The description of the evidence | Evidence.description | |
effective | date | The time during which the evidence is intended to be in use | Evidence.effectivePeriod | |
identifier | token | External identifier for the evidence | Evidence.identifier | |
jurisdiction | token | Intended jurisdiction for the evidence | Evidence.jurisdiction | |
name | string | Computationally friendly name of the evidence | Evidence.name | |
predecessor | reference | What resource is being referenced | Evidence.relatedArtifact.where(type='predecessor').resource (Any) | |
publisher | string | Name of the publisher of the evidence | Evidence.publisher | |
status | token | The current status of the evidence | Evidence.status | |
successor | reference | What resource is being referenced | Evidence.relatedArtifact.where(type='successor').resource (Any) | |
title | string | The human-friendly name of the evidence | Evidence.title | |
topic | token | Topics associated with the Evidence | Evidence.topic | |
url | uri | The uri that identifies the evidence | Evidence.url | |
version | token | The business version of the evidence | Evidence.version |