DSTU2 Ballot Source
This page is part of the FHIR Specification (v0.5.0: DSTU 2 Ballot 2). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions 
StructureDefinition for US Realm DAF laboratory result using Ratio Data Type for numeric results
{
"resourceType": "StructureDefinition",
"id": "observation-daf-results-dafresultobsratio",
"text": {
"status": "generated",
"div": "<div>!-- Snipped for Brevity --></div>"
},
"url": "http://hl7.org/fhir/StructureDefinition/observation-daf-results-dafresultobsratio",
"name": "U.S. Data Access Framework (DAF) Lab Results Profile",
"publisher": "U.S. Office of the National Coordinator (ONC)",
"contact": [
{
"telecom": [
{
"system": "url",
"value": "http://www.healthit.gov"
}
]
}
],
"description": "US Realm DAF laboratory result using Ratio Data Type for numeric results",
"status": "draft",
"date": "2014-11-17",
"type": "constraint",
"abstract": false,
"base": "http://hl7.org/fhir/StructureDefinition/Observation",
"snapshot": {
"element": [
{
"path": "Observation",
"name": "DAFResultObsRatio",
"short": "US Realm DAF laboratory result using Ratio Data Type for numeric results",
"definition": "US Realm clinical quantitative laboratory results to ordering providers in the ambulatory care setting and \"reportable\" laboratory test results to local public health agencies.",
"comments": "Used for simple observations such as device measurements, laboratory atomic results, vital signs, height, weight, smoking status, comments, etc. Other resources are used to provide context for observations such as Lab reports, etc.",
"requirements": "Observations are a key aspect of healthcare. This resource is used to capture those that do not require more sophisticated mechanisms.",
"alias": [
"Vital Signs",
"Measurement",
"Results",
"Tests",
"Obs"
],
"min": 1,
"max": "1",
"type": [
{
"code": "Observation"
}
],
"constraint": [
{
"key": "obs-6",
"name": "data absent reason",
"severity": "error",
"human": "Shall only be present if Observation.value[x] is not present",
"xpath": "not(exists(f:dataAbsentReason)) or (not(exists(*[starts-with(local-name(.), 'value')])))"
}
],
"mapping": [
{
"identity": "v2",
"map": "OBX"
},
{
"identity": "rim",
"map": "Observation[classCode=OBS, moodCode=EVN]"
}
]
},
{
"path": "Observation.id",
"short": "Logical id of this artefact",
"definition": "The logical id of the resource, as used in the url for the resoure. 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. Bundles always have an id, though it is usually a generated UUID.",
"min": 0,
"max": "1",
"type": [
{
"code": "id"
}
]
},
{
"path": "Observation.meta",
"short": "Metadata about the resource",
"definition": "The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content may not always be associated with version changes to the resource.",
"min": 0,
"max": "1",
"type": [
{
"code": "Meta"
}
]
},
{
"path": "Observation.implicitRules",
"short": "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.",
"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 as much as possible.",
"min": 0,
"max": "1",
"type": [
{
"code": "uri"
}
],
"isModifier": true
},
{
"path": "Observation.language",
"short": "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\n\nNot 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).",
"min": 0,
"max": "1",
"type": [
{
"code": "code"
}
],
"binding": {
"name": "Language",
"strength": "required",
"description": "A human language",
"valueSetUri": "http://tools.ietf.org/html/bcp47"
}
},
{
"path": "Observation.text",
"short": "Text summary of the resource, for human interpretation",
"definition": "A human-readable narrative that contains a summary of the resource, and may 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.",
"alias": [
"narrative",
"html",
"xhtml",
"display"
],
"min": 0,
"max": "1",
"type": [
{
"code": "Narrative"
}
],
"condition": [
"dom-1"
],
"mapping": [
{
"identity": "rim",
"map": "Act.text?"
}
]
},
{
"path": "Observation.contained",
"short": "Contained, inline 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.",
"alias": [
"inline resources",
"anonymous resources",
"contained resources"
],
"min": 0,
"max": "*",
"type": [
{
"code": "Resource"
}
],
"mapping": [
{
"identity": "rim",
"map": "N/A"
}
]
},
{
"path": "Observation.extension",
"short": "Additional Content defined by implementations",
"definition": "May be used to represent additional information that is not part of the basic definition of the resource. In order 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.",
"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.",
"alias": [
"extensions",
"user content"
],
"min": 0,
"max": "*",
"type": [
{
"code": "Extension"
}
],
"mapping": [
{
"identity": "rim",
"map": "N/A"
}
]
},
{
"path": "Observation.modifierExtension",
"short": "Extensions that cannot be ignored",
"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. Usually modifier elements provide negation or qualification. In order 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.",
"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.",
"alias": [
"extensions",
"user content"
],
"min": 0,
"max": "*",
"type": [
{
"code": "Extension"
}
],
"isModifier": true,
"mapping": [
{
"identity": "rim",
"map": "N/A"
}
]
},
{
"path": "Observation.code",
"short": "US Realm Laboratory Test Name",
"definition": "The laboratory test that was performed. This is element is bound to LOINC.",
"requirements": "Knowing what kind of observation is being made is essential to understanding the observation.",
"alias": [
"Test Name",
"Observation Identifer"
],
"min": 1,
"max": "1",
"type": [
{
"code": "CodeableConcept"
}
],
"mustSupport": true,
"isSummary": true,
"binding": {
"name": "USLabObservationName",
"strength": "extensible",
"description": "LOINC codes",
"valueSetReference": {
"reference": "http://hl7.org/fhir/vs/obs-uslab-codes"
}
},
"mapping": [
{
"identity": "v2",
"map": "OBX-3-observation identifier"
},
{
"identity": "rim",
"map": "code"
}
]
},
{
"path": "Observation.code.id",
"representation": [
"xmlAttr"
],
"short": "xml:id (or equivalent in JSON)",
"definition": "unique id for the element within a resource (for internal references).",
"min": 0,
"max": "1",
"type": [
{
"code": "id"
}
],
"mapping": [
{
"identity": "rim",
"map": "n/a"
}
]
},
{
"path": "Observation.code.extension",
"short": "Additional Content defined by implementations",
"definition": "May be used to represent additional information that is not part of the basic definition of the element. In order 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.",
"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.",
"alias": [
"extensions",
"user content"
],
"min": 0,
"max": "*",
"type": [
{
"code": "Extension"
}
],
"mapping": [
{
"identity": "rim",
"map": "n/a"
}
]
},
{
"path": "Observation.code.coding",
"short": "Code defined by a terminology system",
"definition": "A reference to a code defined by a terminology system.",
"comments": "Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the V3 Core Principles for more information. Ordering of codings is undefined and SHALL not be used to infer meaning.",
"requirements": "Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings.",
"min": 1,
"max": "*",
"type": [
{
"code": "Coding"
}
],
"mustSupport": true,
"mapping": [
{
"identity": "v2",
"map": "C*E.1-8, C*E.10-22"
},
{
"identity": "rim",
"map": "union(., ./translation)"
}
]
},
{
"path": "Observation.code.coding.id",
"representation": [
"xmlAttr"
],
"short": "xml:id (or equivalent in JSON)",
"definition": "unique id for the element within a resource (for internal references).",
"min": 0,
"max": "1",
"type": [
{
"code": "id"
}
],
"mapping": [
{
"identity": "rim",
"map": "n/a"
}
]
},
{
"path": "Observation.code.coding.extension",
"short": "Additional Content defined by implementations",
"definition": "May be used to represent additional information that is not part of the basic definition of the element. In order 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.",
"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.",
"alias": [
"extensions",
"user content"
],
"min": 0,
"max": "*",
"type": [
{
"code": "Extension"
}
],
"mapping": [
{
"identity": "rim",
"map": "n/a"
}
]
},
{
"path": "Observation.code.coding.system",
"short": "Identity of the terminology system",
"definition": "The identification of the code system that defines the meaning of the symbol in the code.",
"comments": "The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.",
"requirements": "Need to be unambiguous about the source of the definition of the symbol.",
"min": 1,
"max": "1",
"type": [
{
"code": "uri"
}
],
"mustSupport": true,
"mapping": [
{
"identity": "v2",
"map": "C*E.3"
},
{
"identity": "rim",
"map": "./codeSystem"
}
]
},
{
"path": "Observation.code.coding.version",
"short": "Version of the system - if relevant",
"definition": "The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured. and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged.",
"comments": "Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date.",
"min": 0,
"max": "1",
"type": [
{
"code": "string"
}
],
"mapping": [
{
"identity": "v2",
"map": "C*E.7"
},
{
"identity": "rim",
"map": "./codeSystemVersion"
}
]
},
{
"path": "Observation.code.coding.code",
"short": "Symbol in syntax defined by the system",
"definition": "A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination).",
"requirements": "Need to refer to a particular code in the system.",
"min": 1,
"max": "1",
"type": [
{
"code": "code"
}
],
"mustSupport": true,
"mapping": [
{
"identity": "v2",
"map": "C*E.1"
},
{
"identity": "rim",
"map": "./code"
}
]
},
{
"path": "Observation.code.coding.display",
"short": "Representation defined by the system",
"definition": "A representation of the meaning of the code in the system, following the rules of the system.",
"requirements": "Need to be able to carry a human-readable meaning of the code for readers that do not know the system.",
"min": 0,
"max": "1",
"type": [
{
"code": "string"
}
],
"mustSupport": true,
"mapping": [
{
"identity": "v2",
"map": "C*E.2 - but note this is not well followed"
},
{
"identity": "rim",
"map": "CV.displayName"
}
]
},
{
"path": "Observation.code.coding.primary",
"short": "If this code was chosen directly by the user",
"definition": "Indicates that this code was chosen by a user directly - i.e. off a pick list of available items (codes or displays).",
"comments": "Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations.",
"requirements": "This has been identified as a clinical safety criterium - that this exact code was chosen explicitly, rather than inferred by the system based on some rules or language processing.",
"min": 0,
"max": "1",
"type": [
{
"code": "boolean"
}
],
"mapping": [
{
"identity": "v2",
"map": "Sometimes implied by being first"
},
{
"identity": "rim",
"map": "CD.codingRationale"
}
]
},
{
"path": "Observation.code.text",
"short": "Display text",
"definition": "This is the laboratory defined display text for the lab test if different from the code display text(s).",
"comments": "Very often the text is the same as a displayName of one of the codings.",
"requirements": "The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source.",
"min": 0,
"max": "1",
"type": [
{
"code": "string"
}
],
"mustSupport": true,
"mapping": [
{
"identity": "v2",
"map": "C*E.9. But note many systems use C*E.2 for this"
},
{
"identity": "rim",
"map": "./originalText[mediaType/code=\"text/plain\"]/data"
}
]
},
{
"path": "Observation.value[x]",
"short": "Titre value",
"definition": "This is the actual titer result. The Ratio data type is used for titers (e.g., \"1:128\") and other quantities produced by laboratories that truly represent ratios.",
"comments": "Normally, an observation will have either a value or a set of related observations. A few observations (e.g. apgar store) may have both a value and related observations (for apgar, the observations from which the measure is derived). If a value is present, the datatype for this element should be determined by Observation.code. A CodeableConcept with just a text would be used instead of a string if the field was usually coded, or if the type associated with the Observation.code defines a coded value. For boolean values use valueCodeableConcept and select codes from <http://hl7.org/fhir/v2/vs/0136> (These \"yes/no\" concepts can be mapped to the display name \"true/false\" or other mutually exclusive terms that may be needed\"). The element, Observation.value[x], has a variable name depending on the type as follows: valueQuantity, valueCodeableConcept, valueRatio, valueChoice, valuePeriod, valueSampleData, or valueString (The name format is \"'value' + the type name\" with a capital on the first letter of the type).",
"requirements": "An observation exists to have a value, though it may not if it is in error, or it represents a group of observations.",
"alias": [
"titers"
],
"min": 0,
"max": "1",
"type": [
{
"code": "Quantity"
},
{
"code": "CodeableConcept"
},
{
"code": "string"
},
{
"code": "Range"
},
{
"code": "Ratio"
},
{
"code": "SampledData"
},
{
"code": "Attachment"
},
{
"code": "time"
},
{
"code": "dateTime"
},
{
"code": "Period"
}
],
"mustSupport": true,
"isSummary": true,
"binding": {
"name": "ObservationValue",
"strength": "example",
"description": "Codes identifying atomic results of observations when value is type codeableConcept",
"valueSetReference": {
"reference": "http://hl7.org/fhir/vs/observation-values"
}
},
"mapping": [
{
"identity": "v2",
"map": "OBX.2, OBX.5, OBX.6"
},
{
"identity": "rim",
"map": "value"
}
]
},
{
"path": "Observation.dataAbsentReason",
"short": "Why the result is missing",
"definition": "Provides a reason why the expected value in the element Observation.value[x] is missing.",
"comments": "\"Null\" or exceptional values can be represented two ways in FHIR Observations. One way is to simply include them in the value set and represent the exceptions in the value. For example, measurement values for a serology test could be \"detected\", \"not detected\", \"inconclusive\", or \"test not done\". The alternate way is to use the value element for actual observations and use the explicit dataAbsentReason element to record exceptional values. For example, the dataAbsentReason code \"error\" could be used when the measurement was not completed. Because of these options, use-case agreements are required to interpret general observations for exceptional values.",
"requirements": "For many results it is necessary to handle exceptional values in measurements.",
"min": 0,
"max": "1",
"type": [
{
"code": "CodeableConcept"
}
],
"condition": [
"obs-6"
],
"mustSupport": true,
"binding": {
"name": "ObservationValueAbsentReason",
"strength": "extensible",
"description": "Codes specifying why the result (Observation.value[x]) is missing",
"valueSetReference": {
"reference": "http://hl7.org/fhir/vs/observation-valueabsentreason"
}
},
"mapping": [
{
"identity": "v2",
"map": "N/A"
},
{
"identity": "rim",
"map": "value.nullFlavor"
}
]
},
{
"path": "Observation.interpretation",
"short": "High, low, normal, etc.",
"definition": "The assessment made based on the result of the observation.",
"requirements": "For some results, particularly numeric results, an interpretation is necessary to fully understand the significance of a result.",
"min": 0,
"max": "1",
"type": [
{
"code": "CodeableConcept"
}
],
"mustSupport": true,
"binding": {
"name": "USLabObsInterpretation",
"strength": "required",
"description": "Codes identifying interpretations of observations",
"valueSetReference": {
"reference": "http://hl7.org/fhir/vs/obs-uslab-interpretation"
}
},
"mapping": [
{
"identity": "v2",
"map": "OBX-8-interpretation codes"
},
{
"identity": "rim",
"map": "interpretationCode"
}
]
},
{
"path": "Observation.interpretation.id",
"representation": [
"xmlAttr"
],
"short": "xml:id (or equivalent in JSON)",
"definition": "unique id for the element within a resource (for internal references).",
"min": 0,
"max": "1",
"type": [
{
"code": "id"
}
],
"mapping": [
{
"identity": "rim",
"map": "n/a"
}
]
},
{
"path": "Observation.interpretation.extension",
"short": "Additional Content defined by implementations",
"definition": "May be used to represent additional information that is not part of the basic definition of the element. In order 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.",
"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.",
"alias": [
"extensions",
"user content"
],
"min": 0,
"max": "*",
"type": [
{
"code": "Extension"
}
],
"mapping": [
{
"identity": "rim",
"map": "n/a"
}
]
},
{
"path": "Observation.interpretation.coding",
"short": "Code defined by a terminology system",
"definition": "A reference to a code defined by a terminology system.",
"comments": "Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the V3 Core Principles for more information. Ordering of codings is undefined and SHALL not be used to infer meaning.",
"requirements": "Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings.",
"min": 1,
"max": "*",
"type": [
{
"code": "Coding"
}
],
"mustSupport": true,
"mapping": [
{
"identity": "v2",
"map": "C*E.1-8, C*E.10-22"
},
{
"identity": "rim",
"map": "union(., ./translation)"
}
]
},
{
"path": "Observation.interpretation.coding.id",
"representation": [
"xmlAttr"
],
"short": "xml:id (or equivalent in JSON)",
"definition": "unique id for the element within a resource (for internal references).",
"min": 0,
"max": "1",
"type": [
{
"code": "id"
}
],
"mapping": [
{
"identity": "rim",
"map": "n/a"
}
]
},
{
"path": "Observation.interpretation.coding.extension",
"short": "Additional Content defined by implementations",
"definition": "May be used to represent additional information that is not part of the basic definition of the element. In order 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.",
"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.",
"alias": [
"extensions",
"user content"
],
"min": 0,
"max": "*",
"type": [
{
"code": "Extension"
}
],
"mapping": [
{
"identity": "rim",
"map": "n/a"
}
]
},
{
"path": "Observation.interpretation.coding.system",
"short": "Identity of the terminology system",
"definition": "The identification of the code system that defines the meaning of the symbol in the code.",
"comments": "The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.",
"requirements": "Need to be unambiguous about the source of the definition of the symbol.",
"min": 1,
"max": "1",
"type": [
{
"code": "uri"
}
],
"mustSupport": true,
"mapping": [
{
"identity": "v2",
"map": "C*E.3"
},
{
"identity": "rim",
"map": "./codeSystem"
}
]
},
{
"path": "Observation.interpretation.coding.version",
"short": "Version of the system - if relevant",
"definition": "The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured. and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged.",
"comments": "Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date.",
"min": 0,
"max": "1",
"type": [
{
"code": "string"
}
],
"mapping": [
{
"identity": "v2",
"map": "C*E.7"
},
{
"identity": "rim",
"map": "./codeSystemVersion"
}
]
},
{
"path": "Observation.interpretation.coding.code",
"short": "Symbol in syntax defined by the system",
"definition": "A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination).",
"requirements": "Need to refer to a particular code in the system.",
"min": 0,
"max": "1",
"type": [
{
"code": "code"
}
],
"mapping": [
{
"identity": "v2",
"map": "C*E.1"
},
{
"identity": "rim",
"map": "./code"
}
]
},
{
"path": "Observation.interpretation.coding.display",
"short": "Representation defined by the system",
"definition": "A representation of the meaning of the code in the system, following the rules of the system.",
"requirements": "Need to be able to carry a human-readable meaning of the code for readers that do not know the system.",
"min": 0,
"max": "1",
"type": [
{
"code": "string"
}
],
"mapping": [
{
"identity": "v2",
"map": "C*E.2 - but note this is not well followed"
},
{
"identity": "rim",
"map": "CV.displayName"
}
]
},
{
"path": "Observation.interpretation.coding.primary",
"short": "If this code was chosen directly by the user",
"definition": "Indicates that this code was chosen by a user directly - i.e. off a pick list of available items (codes or displays).",
"comments": "Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations.",
"requirements": "This has been identified as a clinical safety criterium - that this exact code was chosen explicitly, rather than inferred by the system based on some rules or language processing.",
"min": 0,
"max": "1",
"type": [
{
"code": "boolean"
}
],
"mapping": [
{
"identity": "v2",
"map": "Sometimes implied by being first"
},
{
"identity": "rim",
"map": "CD.codingRationale"
}
]
},
{
"path": "Observation.interpretation.text",
"short": "Plain text representation of the concept",
"definition": "A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user.",
"comments": "Very often the text is the same as a displayName of one of the codings.",
"requirements": "The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source.",
"min": 0,
"max": "1",
"type": [
{
"code": "string"
}
],
"mapping": [
{
"identity": "v2",
"map": "C*E.9. But note many systems use C*E.2 for this"
},
{
"identity": "rim",
"map": "./originalText[mediaType/code=\"text/plain\"]/data"
}
]
},
{
"path": "Observation.comments",
"short": "Comments about result",
"definition": "May include statements about significant, unexpected or unreliable values, or information about the source of the value where this may be relevant to the interpretation of the result.",
"requirements": "Need to be able to provide free text additional information.",
"min": 0,
"max": "1",
"type": [
{
"code": "string"
}
],
"mapping": [
{
"identity": "v2",
"map": "NTE.3 (partner NTE to OBX, or sometimes another (child?) OBX)"
},
{
"identity": "rim",
"map": "subjectOf.observationEvent[code=\"annotation\"].value"
}
]
},
{
"path": "Observation.applies[x]",
"short": "For lab tests this is the specimen collection date. For Ask at Order Entry Questions (AOE)'s this is the date the question was asked.",
"definition": "For lab tests this is the specimen collection date. For Ask at Order Entry Questions (AOE)'s this is the date the question was asked.",
"comments": "At least a date should be present unless this observation is a historical report.",
"requirements": "Knowing when an observation was deemed true is important to its relevance as well as determining trends.",
"min": 0,
"max": "1",
"type": [
{
"code": "dateTime"
},
{
"code": "Period"
}
],
"constraint": [
{
"key": "inv-1",
"name": "datetime to Day",
"severity": "error",
"human": "Datetime must be at least to day.",
"xpath": "f:matches(appliesDateTime,/\\d{4}-[01]\\d-[0-3]\\dT[0-2]\\d:[0-5]\\d([+-][0-2]\\d:[0-5]\\d|Z)/)"
}
],
"mustSupport": true,
"isSummary": true,
"mapping": [
{
"identity": "v2",
"map": "OBX-14-date/time of the observation, and/or OBX-19 after v2.4 (depends on who observation made)"
},
{
"identity": "rim",
"map": "effectiveTime"
}
]
},
{
"path": "Observation.issued",
"short": "Date/Time this was made available",
"definition": "The date and time this observation was made available.",
"comments": "Updated when the result is updated.",
"min": 0,
"max": "1",
"type": [
{
"code": "instant"
}
],
"mustSupport": true,
"isSummary": true,
"mapping": [
{
"identity": "v2",
"map": "OBR.22 (or MSH.7), or perhaps OBX-19 (depends on who observation made)"
},
{
"identity": "rim",
"map": "participation[typeCode=AUT].time"
}
]
},
{
"extension": [
{
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-display-hint",
"valueString": "default: final"
}
],
"path": "Observation.status",
"short": "registered | preliminary | final | amended +",
"definition": "The status of the result value.",
"requirements": "Need to track the status of individual results - some results are finalised before the whole report is finalised.",
"min": 1,
"max": "1",
"type": [
{
"code": "code"
}
],
"mustSupport": true,
"isModifier": true,
"isSummary": true,
"binding": {
"name": "ObservationStatus",
"strength": "required",
"description": "Codes providing the status of an observation",
"valueSetReference": {
"reference": "http://hl7.org/fhir/vs/observation-status"
}
},
"mapping": [
{
"identity": "v2",
"map": "OBX-11-observation result status"
},
{
"identity": "rim",
"map": "status\n\nAmended & Final are differentiated by whether it is the subject of a ControlAct event with a type of \"revise\""
}
]
},
{
"extension": [
{
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-display-hint",
"valueString": "default: ok"
}
],
"path": "Observation.reliability",
"short": "ok | ongoing | early | questionable | calibrating | error +",
"definition": "An estimate of the degree to which quality issues have impacted on the value reported.",
"comments": "Note that in most contexts, unreliable results are not recorded, deleted, or otherwise excluded, but it's not always possible to exclude them from the record. If the reliability indicator is present, interpreters of a result, whether human or machine, should always either be aware of the status or prevented from using the observation without being unaware that the reliability is not \"ok\".",
"requirements": "Not all results are completely reliable, and some are still reported anyway.",
"min": 0,
"max": "1",
"type": [
{
"code": "code"
}
],
"isModifier": true,
"binding": {
"name": "ObservationReliability",
"strength": "required",
"description": "Codes that provide an estimate of the degree to which quality issues have impacted on the value of an observation",
"valueSetReference": {
"reference": "http://hl7.org/fhir/vs/observation-reliability"
}
},
"mapping": [
{
"identity": "v2",
"map": "Maybe OBX.8/OBX.9"
},
{
"identity": "rim",
"map": "uncertaintyCode"
}
]
},
{
"path": "Observation.bodySite[x]",
"short": "Observed body part",
"definition": "Indicates the site on the subject's body where the observation was made ( i.e. the target site).",
"comments": "Only used if not implicit in code found in Observation.code.",
"requirements": "Knowing where the observation is made is important for tracking if multiple sites are possible.",
"min": 0,
"max": "0",
"type": [
{
"code": "CodeableConcept"
},
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/BodySite"
}
],
"binding": {
"name": "BodySite",
"strength": "example",
"description": "Codes describing anatomical locations. May include laterality",
"valueSetReference": {
"reference": "http://hl7.org/fhir/vs/body-site"
}
},
"mapping": [
{
"identity": "v2",
"map": "OBX-20-observation site"
},
{
"identity": "rim",
"map": "targetSiteCode"
}
]
},
{
"path": "Observation.method",
"short": "How it was done",
"definition": "Indicates the mechanism used to perform the observation.",
"comments": "Only used if not implicit in code for Observation.code.",
"requirements": "In some cases, method can impact results and is thus for determining whether results can be compared or determining significance of results.",
"min": 0,
"max": "1",
"type": [
{
"code": "CodeableConcept"
}
],
"binding": {
"name": "ObservationMethod",
"strength": "example",
"description": "Methods for simple observations",
"valueSetReference": {
"reference": "http://hl7.org/fhir/vs/observation-methods"
}
},
"mapping": [
{
"identity": "v2",
"map": "OBX-17-observation method"
},
{
"identity": "rim",
"map": "methodCode"
}
]
},
{
"path": "Observation.identifier",
"short": "Unique Id for this particular observation",
"definition": "A unique identifier for the simple observation.",
"requirements": "Allows observations to be distinguished and referenced.",
"min": 1,
"max": "*",
"type": [
{
"code": "Identifier"
}
],
"mustSupport": true,
"mapping": [
{
"identity": "v2",
"map": "OBX.21"
},
{
"identity": "rim",
"map": "id"
}
]
},
{
"path": "Observation.identifier.id",
"representation": [
"xmlAttr"
],
"short": "xml:id (or equivalent in JSON)",
"definition": "unique id for the element within a resource (for internal references).",
"min": 0,
"max": "1",
"type": [
{
"code": "id"
}
],
"mapping": [
{
"identity": "rim",
"map": "n/a"
}
]
},
{
"path": "Observation.identifier.extension",
"short": "Additional Content defined by implementations",
"definition": "May be used to represent additional information that is not part of the basic definition of the element. In order 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.",
"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.",
"alias": [
"extensions",
"user content"
],
"min": 0,
"max": "*",
"type": [
{
"code": "Extension"
}
],
"mapping": [
{
"identity": "rim",
"map": "n/a"
}
]
},
{
"path": "Observation.identifier.use",
"short": "usual | official | temp | secondary (If known)",
"definition": "The purpose of this identifier.",
"comments": "This is labeled as \"Is Modifier\" because applications should not mistake a temporary id for a permanent one. Applications can assume that an identifier is permanent unless it explicitly says that it is temporary.",
"requirements": "Allows the appropriate identifier for a particular context of use to be selected from among a set of identifiers.",
"min": 1,
"max": "1",
"type": [
{
"code": "code"
}
],
"mustSupport": true,
"isModifier": true,
"binding": {
"name": "IdentifierUse",
"strength": "required",
"description": "Identifies the purpose for this identifier, if known",
"valueSetReference": {
"reference": "http://hl7.org/fhir/vs/identifier-use"
}
},
"mapping": [
{
"identity": "v2",
"map": "N/A"
},
{
"identity": "rim",
"map": "Role.code or implied by context"
}
]
},
{
"path": "Observation.identifier.type",
"short": "Description of identifier",
"definition": "A coded type for the identifier that can be used to determine which identifier to use for a specific purpose.",
"comments": "Where the system is known, a type is unnecessary because the type is always part of the system definition. However systems often need to handle identifiers where the system is not known. There is not a 1:1 relationship between type and system, since many different systems have the same type.",
"requirements": "Allows users to make use of identifiers when the identifier system is not known.",
"min": 0,
"max": "1",
"type": [
{
"code": "CodeableConcept"
}
],
"binding": {
"name": "IdentifierType",
"strength": "extensible",
"description": "A coded type for an identifier that can be used to determine which identifier to use for a specific purpose",
"valueSetReference": {
"reference": "http://hl7.org/fhir/vs/identifier-type"
}
},
"mapping": [
{
"identity": "v2",
"map": "CX.5"
},
{
"identity": "rim",
"map": "Role.code or implied by context"
}
]
},
{
"path": "Observation.identifier.system",
"short": "The namespace for the identifier",
"definition": "Establishes the namespace in which set of possible id values is unique.",
"requirements": "There are many sequences of identifiers. To perform matching, we need to know what sequence we're dealing with. The system identifies a particular sequence or set of unique identifiers.",
"min": 1,
"max": "1",
"type": [
{
"code": "uri"
}
],
"exampleUri": "http://www.acme.com/identifiers/patient or urn:ietf:rfc:3986 if the id itself is a full uri",
"mustSupport": true,
"mapping": [
{
"identity": "v2",
"map": "CX.4 / EI-2-4"
},
{
"identity": "rim",
"map": "II.root or Role.id.root"
},
{
"identity": "servd",
"map": "./IdentifierType"
}
]
},
{
"path": "Observation.identifier.value",
"short": "The value that is unique",
"definition": "The portion of the identifier typically displayed to the user and which is unique within the context of the system.",
"comments": "If the value is a full URI, then the system SHALL be urn:ietf:rfc:3986.",
"min": 1,
"max": "1",
"type": [
{
"code": "string"
}
],
"exampleString": "123456",
"mustSupport": true,
"mapping": [
{
"identity": "v2",
"map": "CX.1 / EI.1"
},
{
"identity": "rim",
"map": "II.extension or II.root if system indicates OID or GUID (Or Role.id.extension or root)"
},
{
"identity": "servd",
"map": "./Value"
}
]
},
{
"path": "Observation.identifier.period",
"short": "Time period when id is/was valid for use",
"definition": "Time period during which identifier is/was valid for use.",
"min": 0,
"max": "1",
"type": [
{
"code": "Period"
}
],
"mapping": [
{
"identity": "v2",
"map": "CX.7 + CX.8"
},
{
"identity": "rim",
"map": "Role.effectiveTime or implied by context"
},
{
"identity": "servd",
"map": "./StartDate and ./EndDate"
}
]
},
{
"path": "Observation.identifier.assigner",
"short": "Organization that issued id (may be just text)",
"definition": "Organization that issued/manages the identifier.",
"comments": "The reference may be just a text description of the assigner.",
"min": 0,
"max": "1",
"type": [
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/Organization"
}
],
"mapping": [
{
"identity": "v2",
"map": "CX.4 / (CX.4,CX.9,CX.10)"
},
{
"identity": "rim",
"map": "II.assigningAuthorityName but note that this is an improper use by the definition of the field. Also Role.scoper"
},
{
"identity": "servd",
"map": "./IdentifierIssuingAuthority"
}
]
},
{
"path": "Observation.subject",
"short": "Who and/or what this is about",
"definition": "The patient, or group of patients, location, or device whose characteristics (direct or indirect) are described by the observation and into whose record the observation is placed. Comments: Indirect characteristics may be those of a specimen, fetus,\nother observer (for example a relative or EMT), or any observation made about the subject.",
"comments": "One would expect this element to be a cardinality of 1..1. The only circumstance in which the subject can be missing is when the observation is made by a device that does not know the patient. In this case, the observation SHALL be matched to a patient through some context/channel matching technique, and at this point, the observation should be updated. If the target of the observation is different than the subject, the general extension (http://hl7.org/fhir/StructureDefinition/indirectTarget) can be used.",
"requirements": "Observations have no value if you don't know who or what they're about.",
"min": 1,
"max": "1",
"type": [
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/patient-daf-dafpatient"
}
],
"mustSupport": true,
"isSummary": true,
"mapping": [
{
"identity": "v2",
"map": "PID-3-patient ID list"
},
{
"identity": "rim",
"map": "participation[typeCode=SBJ]"
}
]
},
{
"path": "Observation.specimen",
"short": "Specimen used for this observation",
"definition": "The specimen that was used when this observation was made.",
"comments": "Observations are not made on specimens themselves; they are made on a subject, but usually by the means of a specimen. Note that although specimens are often involved, they are not always tracked and reported explicitly. Also note that observation resources are often used in contexts that track the specimen explicitly (e.g. Diagnostic Report).",
"min": 0,
"max": "1",
"type": [
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/Specimen"
}
],
"mapping": [
{
"identity": "v2",
"map": "SPM segment"
},
{
"identity": "rim",
"map": "participation[typeCode=SPC].specimen"
}
]
},
{
"path": "Observation.performer",
"short": "Who did the observation",
"definition": "Who was responsible for asserting the observed value as \"true\".",
"requirements": "May give a degree of confidence in the observation and also indicates where follow-up questions should be directed.",
"min": 0,
"max": "*",
"type": [
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/pract-daf-dafpract"
},
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/org-daf-daforganization"
},
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/patient-daf-dafpatient"
},
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/relatedperson-daf-dafrelatedperson"
}
],
"isSummary": true,
"mapping": [
{
"identity": "v2",
"map": "OBX.15 / (Practitioner) OBX-16-responsible observer, PRT-5-participation person:PRT-4-participation='RO' / \n(Device) OBX-18-equipment instance identifier , PRT-10-participation device:PRT-4-participation='EQUIP' / (Organization) OBX-23-performing organization name, PRT-8-participation organization:PRT-4-participation='PO'"
},
{
"identity": "rim",
"map": "participation[typeCode=PRF]"
}
]
},
{
"path": "Observation.device",
"short": "(Measurement) Device",
"definition": "The device used to generate the observation data.",
"comments": "An extension should be used if further typing of the device is needed. Devices used to support obtaining an observation can be represented using either extension or through the Observation.related element.",
"min": 0,
"max": "1",
"type": [
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/Device"
},
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/DeviceMetric"
}
],
"mapping": [
{
"identity": "v2",
"map": "OBX-17 / PRT -10"
},
{
"identity": "rim",
"map": "participation[typeCode=DEV]"
}
]
},
{
"path": "Observation.encounter",
"short": "Healthcare event during which this observation is made",
"definition": "The healthcare event ( e.g. a patient and healthcare provider interaction ) during which this observation is made.",
"requirements": "For some observations it may be important to know the link between an observation and a particular encounter.",
"min": 1,
"max": "1",
"type": [
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/encounter-daf-dafencounter"
}
],
"mustSupport": true,
"mapping": [
{
"identity": "v2",
"map": "PV1"
},
{
"identity": "rim",
"map": "inboundRelationship[typeCode=COMP].source[classCode=ENC, moodCode=EVN]"
}
]
},
{
"path": "Observation.referenceRange",
"short": "Provides guide for interpretation",
"definition": "Guidance on how to interpret the value by comparison to a normal or recommended range.",
"comments": "Most observations only have one generic reference range. Systems MAY choose to restrict to only supplying the relevant reference range based on knowledge about the patient (e.g. specific to the patient's age, gender, weight and other factors), but this may not be possible or appropriate. Whenever more than one reference range is supplied, the differences between them SHOULD be provided in the reference range and/or age properties.",
"requirements": "Knowing what values are considered \"normal\" can help evaluate the significance of a particular result. Need to be able to provide multiple reference ranges for different contexts.",
"min": 0,
"max": "1",
"constraint": [
{
"key": "obs-3",
"name": "reference range",
"severity": "error",
"human": "Must have at least a low or a high or text",
"xpath": "(exists(f:low) or exists(f:high)or exists(f:text))"
}
],
"mustSupport": true,
"mapping": [
{
"identity": "v2",
"map": "OBX.7"
},
{
"identity": "rim",
"map": "outboundRelationship[typeCode=REFV]/target[classCode=OBS, moodCode=EVN]"
}
]
},
{
"path": "Observation.referenceRange.id",
"representation": [
"xmlAttr"
],
"short": "xml:id (or equivalent in JSON)",
"definition": "unique id for the element within a resource (for internal references).",
"min": 0,
"max": "1",
"type": [
{
"code": "id"
}
],
"mapping": [
{
"identity": "rim",
"map": "n/a"
}
]
},
{
"path": "Observation.referenceRange.extension",
"short": "Additional Content defined by implementations",
"definition": "May be used to represent additional information that is not part of the basic definition of the element. In order 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.",
"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.",
"alias": [
"extensions",
"user content"
],
"min": 0,
"max": "*",
"type": [
{
"code": "Extension"
}
],
"mapping": [
{
"identity": "rim",
"map": "n/a"
}
]
},
{
"path": "Observation.referenceRange.modifierExtension",
"short": "Extensions that cannot be ignored",
"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 that contains it. Usually modifier elements provide negation or qualification. In order 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.",
"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.",
"alias": [
"extensions",
"user content",
"modifiers"
],
"min": 0,
"max": "*",
"type": [
{
"code": "Extension"
}
],
"isModifier": true,
"mapping": [
{
"identity": "rim",
"map": "N/A"
}
]
},
{
"path": "Observation.referenceRange.low",
"short": "Low Range, if relevant",
"definition": "The value of the low bound of the reference range. If this element is omitted, the low bound of the reference range is assumed to be meaningless. (e.g. reference range is <2.3) If the low.comparator element is missing, it is assumed to be '>'.",
"min": 0,
"max": "1",
"type": [
{
"code": "Quantity"
}
],
"condition": [
"obs-3",
"obs-4"
],
"constraint": [
{
"key": "obs-4",
"name": "low range comparators",
"severity": "error",
"human": "Low range comparators can only be '>' or '>=' or empty",
"xpath": "not(exists(f:comparator)) or boolean(f:comparator/@value = '<') or boolean(f:comparator/@value = '<=')"
}
],
"mapping": [
{
"identity": "v2",
"map": "OBX-7-references range"
},
{
"identity": "rim",
"map": "value:IVL_PQ.low"
}
]
},
{
"path": "Observation.referenceRange.high",
"short": "High Range, if relevant",
"definition": "The value of the high bound of the reference range. If this element is omitted, the high bound of the reference range is assumed to be meaningless. (e.g. reference range is > 5) If the low.comparator element is missing , it is assumed to be '<'.",
"min": 0,
"max": "1",
"type": [
{
"code": "Quantity"
}
],
"condition": [
"obs-3",
"obs-5"
],
"constraint": [
{
"key": "obs-5",
"name": "high range comparators",
"severity": "error",
"human": "High range comparators can only be '<' or '<=' or empty",
"xpath": "not(exists(f:comparator)) or boolean(f:comparator/@value = '>') or boolean(f:comparator/@value = '>=')"
}
],
"mapping": [
{
"identity": "v2",
"map": "OBX-7-references range"
},
{
"identity": "rim",
"map": "value:IVL_PQ.high"
}
]
},
{
"path": "Observation.referenceRange.meaning",
"short": "Indicates the meaning/use of this range of this range",
"definition": "Code for the meaning of the reference range.",
"comments": "This SHOULD be populated if there is more than one range.",
"requirements": "Need to be able to say what kind of reference range this is - normal, recommended, therapeutic, or perhaps what state this reference range applies to (i.e. age, hormonal cycles, etc.).",
"min": 0,
"max": "1",
"type": [
{
"code": "CodeableConcept"
}
],
"binding": {
"name": "ObservationRangeMeaning",
"strength": "example",
"description": "Code for the meaning of a reference range",
"valueSetReference": {
"reference": "http://hl7.org/fhir/vs/referencerange-meaning"
}
},
"mapping": [
{
"identity": "v2",
"map": "OBX-10-nature of abnormal test?"
},
{
"identity": "rim",
"map": "interpretationCode"
}
]
},
{
"path": "Observation.referenceRange.age",
"short": "Applicable age range, if relevant",
"definition": "The age at which this reference range is applicable. This is a neonatal age (e.g. number of weeks at term) if the meaning says so.",
"requirements": "Some analytes vary greatly over age.",
"min": 0,
"max": "1",
"type": [
{
"code": "Range"
}
],
"mapping": [
{
"identity": "rim",
"map": "outboundRelationship[typeCode=PRCN].targetObservationCriterion[code=\"age\"].value"
}
]
},
{
"path": "Observation.referenceRange.text",
"short": "Text based reference range in an observation",
"definition": "Text based reference range in an observation which may be used when a quantitative range is not appropriate for an observation. An example would be a reference value of \"Negative\" or a list or table of 'normals'.",
"min": 0,
"max": "1",
"type": [
{
"code": "string"
}
],
"mustSupport": true,
"mapping": [
{
"identity": "v2",
"map": "OBX-7-references range"
},
{
"identity": "rim",
"map": "value:ST"
}
]
},
{
"path": "Observation.related",
"short": "Observations related to this observation",
"definition": "Related observations - either components, or previous observations, or statements of derivation.",
"comments": "Normally, an observation will have either a value or a set of related observations. A few observations (e.g. apgar store) may have both a value and related observations (for apgar, the observations from which the measure is derived).",
"requirements": "Some observations have important relationships to other observations (e.g Blood Pressure = systolic + diastolic), or are derived from other observations (e.g. calculated apgar score).",
"min": 0,
"max": "0",
"isSummary": true,
"mapping": [
{
"identity": "v2",
"map": "Relationships established by OBX-4 usage"
},
{
"identity": "rim",
"map": "outBoundRelationship"
}
]
},
{
"path": "Observation.related.id",
"representation": [
"xmlAttr"
],
"short": "xml:id (or equivalent in JSON)",
"definition": "unique id for the element within a resource (for internal references).",
"min": 0,
"max": "1",
"type": [
{
"code": "id"
}
],
"mapping": [
{
"identity": "rim",
"map": "n/a"
}
]
},
{
"path": "Observation.related.extension",
"short": "Additional Content defined by implementations",
"definition": "May be used to represent additional information that is not part of the basic definition of the element. In order 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.",
"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.",
"alias": [
"extensions",
"user content"
],
"min": 0,
"max": "*",
"type": [
{
"code": "Extension"
}
],
"mapping": [
{
"identity": "rim",
"map": "n/a"
}
]
},
{
"path": "Observation.related.modifierExtension",
"short": "Extensions that cannot be ignored",
"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 that contains it. Usually modifier elements provide negation or qualification. In order 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.",
"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.",
"alias": [
"extensions",
"user content",
"modifiers"
],
"min": 0,
"max": "*",
"type": [
{
"code": "Extension"
}
],
"isModifier": true,
"mapping": [
{
"identity": "rim",
"map": "N/A"
}
]
},
{
"path": "Observation.related.type",
"short": "has-component | has-member | derived-from | sequel-to | replaces | qualified-by | interfered-by",
"definition": "A code specifying the kind of relationship that exists with the target observation.",
"comments": "A relationship type SHOULD be provided. If the relationship type is \"COMP\" (composed), then the observation should not be displayed/interpreted in the absence of the related observations.",
"requirements": "May need to indicate whether this observation is composed of others, or merely derived from them.",
"min": 0,
"max": "1",
"type": [
{
"code": "code"
}
],
"binding": {
"name": "ObservationRelationshipType",
"strength": "required",
"description": "Codes specifying how two observations are related",
"valueSetReference": {
"reference": "http://hl7.org/fhir/vs/observation-relationshiptypes"
}
},
"mapping": [
{
"identity": "v2",
"map": "N/A"
},
{
"identity": "rim",
"map": ".typeCode"
}
]
},
{
"path": "Observation.related.target",
"short": "Observation that is related to this one",
"definition": "A reference to the observation that is related to this observation.",
"min": 1,
"max": "1",
"type": [
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/Observation"
}
],
"mapping": [
{
"identity": "rim",
"map": ".targetObservation"
}
]
}
]
},
"differential": {
"element": [
{
"path": "Observation",
"name": "DAFResultObsRatio",
"short": "US Realm DAF laboratory result using Ratio Data Type for numeric results",
"definition": "US Realm clinical quantitative laboratory results to ordering providers in the ambulatory care setting and \"reportable\" laboratory test results to local public health agencies.",
"alias": [
"Obs"
],
"min": 1,
"max": "1",
"type": [
{
"code": "Observation"
}
]
},
{
"path": "Observation.code",
"short": "US Realm Laboratory Test Name",
"definition": "The laboratory test that was performed. This is element is bound to LOINC.",
"alias": [
"Test Name",
"Observation Identifer"
],
"min": 1,
"max": "1",
"type": [
{
"code": "CodeableConcept"
}
],
"mustSupport": true,
"binding": {
"name": "USLabObservationName",
"strength": "extensible",
"description": "LOINC codes",
"valueSetReference": {
"reference": "http://hl7.org/fhir/vs/obs-uslab-codes"
}
}
},
{
"path": "Observation.code.coding",
"min": 1,
"max": "*",
"type": [
{
"code": "Coding"
}
],
"mustSupport": true
},
{
"path": "Observation.code.coding.system",
"min": 1,
"max": "1",
"type": [
{
"code": "uri"
}
],
"mustSupport": true
},
{
"path": "Observation.code.coding.code",
"min": 1,
"max": "1",
"type": [
{
"code": "code"
}
],
"mustSupport": true
},
{
"path": "Observation.code.coding.display",
"min": 0,
"max": "1",
"type": [
{
"code": "string"
}
],
"mustSupport": true
},
{
"path": "Observation.code.text",
"short": "Display text",
"definition": "This is the laboratory defined display text for the lab test if different from the code display text(s).",
"min": 0,
"max": "1",
"type": [
{
"code": "string"
}
],
"mustSupport": true
},
{
"path": "Observation.valueRatio",
"short": "Titre value",
"definition": "This is the actual titer result. The Ratio data type is used for titers (e.g., \"1:128\") and other quantities produced by laboratories that truly represent ratios.",
"alias": [
"titers"
],
"min": 0,
"max": "1",
"mustSupport": true
},
{
"path": "Observation.valueRatio.numerator",
"min": 0,
"max": "1",
"type": [
{
"code": "Quantity"
}
],
"mustSupport": true
},
{
"path": "Observation.valueRatio.denominator",
"min": 0,
"max": "1",
"type": [
{
"code": "Quantity"
}
],
"mustSupport": true
},
{
"path": "Observation.dataAbsentReason",
"min": 0,
"max": "1",
"type": [
{
"code": "CodeableConcept"
}
],
"mustSupport": true
},
{
"path": "Observation.interpretation",
"min": 0,
"max": "1",
"type": [
{
"code": "CodeableConcept"
}
],
"mustSupport": true,
"binding": {
"name": "USLabObsInterpretation",
"strength": "required",
"description": "Codes identifying interpretations of observations",
"valueSetReference": {
"reference": "http://hl7.org/fhir/vs/obs-uslab-interpretation"
}
}
},
{
"path": "Observation.interpretation.coding",
"min": 1,
"max": "*",
"type": [
{
"code": "Coding"
}
],
"mustSupport": true
},
{
"path": "Observation.interpretation.coding.code",
"min": 1,
"max": "1",
"type": [
{
"code": "code"
}
],
"mustSupport": true
},
{
"path": "Observation.interpretation.coding.system",
"min": 1,
"max": "1",
"type": [
{
"code": "uri"
}
],
"mustSupport": true
},
{
"path": "Observation.applies[x]",
"short": "For lab tests this is the specimen collection date. For Ask at Order Entry Questions (AOE)'s this is the date the question was asked.",
"definition": "For lab tests this is the specimen collection date. For Ask at Order Entry Questions (AOE)'s this is the date the question was asked.",
"min": 0,
"max": "1",
"type": [
{
"code": "dateTime"
},
{
"code": "Period"
}
],
"condition": [
"inv-1"
],
"constraint": [
{
"key": "inv-1",
"name": "datetime to Day",
"severity": "error",
"human": "Datetime must be at least to day.",
"xpath": "f:matches(appliesDateTime,/\\d{4}-[01]\\d-[0-3]\\dT[0-2]\\d:[0-5]\\d([+-][0-2]\\d:[0-5]\\d|Z)/)"
}
],
"mustSupport": true
},
{
"path": "Observation.issued",
"min": 0,
"max": "1",
"type": [
{
"code": "instant"
}
],
"mustSupport": true
},
{
"path": "Observation.status",
"min": 1,
"max": "1",
"type": [
{
"code": "code"
}
],
"mustSupport": true
},
{
"path": "Observation.bodySite[x]",
"min": 0,
"max": "0"
},
{
"path": "Observation.identifier",
"min": 1,
"max": "*",
"type": [
{
"code": "Identifier"
}
],
"mustSupport": true
},
{
"path": "Observation.identifier.use",
"min": 1,
"max": "1",
"type": [
{
"code": "code"
}
],
"mustSupport": true
},
{
"path": "Observation.identifier.system",
"min": 1,
"max": "1",
"type": [
{
"code": "uri"
}
],
"mustSupport": true
},
{
"path": "Observation.identifier.value",
"min": 1,
"max": "1",
"type": [
{
"code": "string"
}
],
"mustSupport": true
},
{
"path": "Observation.subject",
"min": 1,
"max": "1",
"type": [
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/patient-daf-dafpatient"
}
],
"mustSupport": true
},
{
"path": "Observation.performer",
"min": 0,
"max": "*",
"type": [
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/pract-daf-dafpract"
},
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/org-daf-daforganization"
},
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/patient-daf-dafpatient"
},
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/relatedperson-daf-dafrelatedperson"
}
]
},
{
"path": "Observation.encounter",
"min": 1,
"max": "1",
"type": [
{
"code": "Reference",
"profile": "http://hl7.org/fhir/StructureDefinition/encounter-daf-dafencounter"
}
],
"mustSupport": true
},
{
"path": "Observation.referenceRange",
"min": 0,
"max": "1",
"mustSupport": true
},
{
"path": "Observation.referenceRange.text",
"min": 0,
"max": "1",
"type": [
{
"code": "string"
}
],
"mustSupport": true
},
{
"path": "Observation.related",
"min": 0,
"max": "0"
}
]
}
}
© HL7.org 2011+. FHIR DSTU (v0.5.0-5149) generated on Fri, Apr 3, 2015 14:34+1100.
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