DocumentReference
- Profile status:
Draft - Canonical URL:
http://fhir.smart4health.eu/StructureDefinition/s4h-documentreference
Use of resource in Smart4Health
DocumentReference is used to communicate a document along with associated meta-data (document type, author etc.). In this context, "document" can refer to a wide array of data types: text files, images (which may themselves be scans of paper documents) etc. Accordingly, the associated data can be in a number of formats e.g. PDF or JPEG. Currently, only the following file types are supported for Smart4Health: JPEG, PNG, TIFF, PDF, and DCM (Dicom images).
The data representing the data itself can be included directly in base-64 encoding (in DocumentReference.content.attachment.data) or referenced by a URL at which the data can be retrieved (in DocumentReference.content.attachment.url). In the Smart4Health context, inlining the data should be preferred as it ensures that the data is always available to the data consumer and avoids problems associated with data retrieval (access restrictions, internet connectivity, moved resource etc.). However, note that the Smart4Health platform limits the size of attachments to 10 MB.
Relation to other DocumentReference profiles
The IPS implementation guide does not contain a DocumentReference profile. In designing the Smart4Health profile, we have therefore tried to align with the DocumentReference profile from the Trillium II project, a project that was closely aligned with the IPS.
Guidelines for handling multiple files/attachment
In the base FHIR specification, DocumentReference resources are allowed to contain multiple content elements which, however, must represent the same content in different formats (e.g. the same document as a PDF and as plain text file). However, the exact interpretation of this latter requirement has proven complicated, leaving a risk of incorrect usage. To preempt such issues, the Smart4Health DocumentReference profile limits the number of content elements to exactly one, i.e. each such resource can carry exactly one binary attachment/file.
In cases where the source systems has multiple files grouped together, one should proceed as follows:
- If the files contain distinct, complete documents: In this case, one DocumentReference resource should be created per file.
- If the files contains copies of the same, complete document in different formats (e.g. PDF and plain text): In this case, one format should be chosen and a single DocumentReference resource containing the corresponding data created.
- If the files contains different parts (e.g. separate pages) of the same document: In this case, the files must be merged together into one file that correctly represents the full document and then put in a single DocumentReference resource. It is not allowed to put the separate parts in different resources even if these are linked via
DocumentReference.relatesTo.
Mandatory and must-support data elements
A valid instance according to this profile must satisfy the following constraints:
- have a status (element:
status) - base constraint - have the time the included document was created (element:
date) - Smart4Health constraint, to allow proper identification of the resource within a complete patient record - have exactly one content element (element:
content) containing an attachment conforming to the Smart4Health Attachment profile - Smart4Health constraint, to avoid confusion or incorrect use since the use and meaning of multiple content element is currently unclear
In addition, 12 top-level elements are marked as must-support.
Example resources
- DocumentReference example ittm-upload-with-png-docref-example
- DocumentReference example user-added-medical-doc-docref-example
Formal views of profile content
Differential view
Shows only differences relative to the base resource definition.
| S4hDocumentReference (DocumentReference) | I | DocumentReference | There are no (further) constraints on this element Element idDocumentReference A reference to a document DefinitionA reference to a document of any kind for any purpose. Provides metadata about the document so that the document can be discovered and managed. The scope of a document is any seralized object with a mime-type, so includes formal patient centric documents (CDA), cliical notes, scanned paper, and non-patient specific documents like policy text. Usually, this is used for documents other than those defined by FHIR.
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| id | Σ | 0..1 | string | There are no (further) constraints on this element Element idDocumentReference.id Logical id of this artifact DefinitionThe logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes. The only time that a resource does not have an id is when it is being submitted to the server using a create operation. |
| meta | Σ | 0..1 | Meta | There are no (further) constraints on this element Element idDocumentReference.meta Metadata about the resource DefinitionThe 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.
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| implicitRules | Σ ?! | 0..1 | uri | There are no (further) constraints on this element Element idDocumentReference.implicitRules A set of rules under which this content was created DefinitionA 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. 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.
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| language | 0..1 | codeBinding | There are no (further) constraints on this element Element idDocumentReference.language Language of the resource content DefinitionThe base language in which the resource is written. 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). A human language.
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| text | 0..1 | Narrative | There are no (further) constraints on this element Element idDocumentReference.text Text summary of the resource, for human interpretation Alternate namesnarrative, html, xhtml, display DefinitionA 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. 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.
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| contained | 0..* | Resource | There are no (further) constraints on this element Element idDocumentReference.contained Contained, inline Resources Alternate namesinline resources, anonymous resources, contained resources DefinitionThese 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. 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.
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| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idDocumentReference.extension Additional content defined by implementations Alternate namesextensions, user content DefinitionMay 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. 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. Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints
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| modifierExtension | ?! I | 0..* | Extension | There are no (further) constraints on this element Element idDocumentReference.modifierExtension Extensions that cannot be ignored Alternate namesextensions, user content DefinitionMay 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). 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. 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. Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints
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| masterIdentifier | Σ | 0..1 | Identifier | There are no (further) constraints on this element Element idDocumentReference.masterIdentifier Master Version Specific Identifier DefinitionDocument identifier as assigned by the source of the document. This identifier is specific to this version of the document. This unique identifier may be used elsewhere to identify this version of the document. The structure and format of this Id shall be consistent with the specification corresponding to the formatCode attribute. (e.g. for a DICOM standard document a 64-character numeric UID, for an HL7 CDA format a serialization of the CDA Document Id extension and root in the form "oid^extension", where OID is a 64 digits max, and the Id is a 16 UTF-8 char max. If the OID is coded without the extension then the '^' character shall not be included.). CDA Document Id extension and root.
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| identifier | S Σ | 0..* | Identifier | There are no (further) constraints on this element Element idDocumentReference.identifier Other identifiers for the document DefinitionOther identifiers associated with the document, including version independent identifiers.
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| status | S Σ ?! | 1..1 | codeBinding | There are no (further) constraints on this element Element idDocumentReference.status current | superseded | entered-in-error DefinitionThe status of this document reference. This is the status of the DocumentReference object, which might be independent from the docStatus element. This element is labeled as a modifier because the status contains the codes that mark the document or reference as not currently valid. The status of the document reference.
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| docStatus | Σ | 0..1 | codeBinding | There are no (further) constraints on this element Element idDocumentReference.docStatus preliminary | final | amended | entered-in-error DefinitionThe status of the underlying document. The document that is pointed to might be in various lifecycle states. Status of the underlying document.
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| type | S Σ | 0..1 | CodeableConceptIPSBinding | Element idDocumentReference.type Concept - reference to a terminology or just text DefinitionA concept that may be defined by a formal reference to a terminology or ontology or may be provided by text. Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination. Precise type of clinical document.
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| category | S Σ | 0..* | CodeableConceptIPS | Element idDocumentReference.category Concept - reference to a terminology or just text Alternate namesclaxs DefinitionA concept that may be defined by a formal reference to a terminology or ontology or may be provided by text. Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination. High-level kind of a clinical document at a macro level.
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| subject | S Σ I | 0..1 | Reference(Group | Device | S4hPatient | PractitionerUvIps) | Element idDocumentReference.subject Who/what is the subject of the document DefinitionWho or what the document is about. The document can be about a person, (patient or healthcare practitioner), a device (e.g. a machine) or even a group of subjects (such as a document about a herd of farm animals, or a set of patients that share a common exposure). 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. Reference(Group | Device | S4hPatient | PractitionerUvIps) Constraints
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| date | S Σ | 1..1 | instant | Element idDocumentReference.date When this document reference was created Alternate namesindexed DefinitionWhen the document reference was created. Within the Smart4Health project, the creation date needed to properly place the document within a complete patient record. Referencing/indexing time is used for tracking, organizing versions and searching.
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| author | S Σ I | 0..* | Reference(Device | RelatedPerson | PractitionerUvIps | PractitionerRoleUvIps | S4hPatient | OrganizationUvIps) | Element idDocumentReference.author Who and/or what authored the document DefinitionIdentifies who is responsible for adding the information to the document. Not necessarily who did the actual data entry (i.e. typist) or who was the source (informant). Reference(Device | RelatedPerson | PractitionerUvIps | PractitionerRoleUvIps | S4hPatient | OrganizationUvIps) Constraints
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| authenticator | I | 0..1 | Reference(Practitioner | PractitionerRole | Organization) | There are no (further) constraints on this element Element idDocumentReference.authenticator Who/what authenticated the document DefinitionWhich person or organization authenticates that this document is valid. Represents a participant within the author institution who has legally authenticated or attested the document. Legal authentication implies that a document has been signed manually or electronically by the legal Authenticator. Reference(Practitioner | PractitionerRole | Organization) Constraints
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| custodian | S I | 0..1 | Reference(OrganizationUvIps) | Element idDocumentReference.custodian Organization which maintains the document DefinitionIdentifies the organization or group who is responsible for ongoing maintenance of and access to the document. Identifies the logical organization (software system, vendor, or department) to go to find the current version, where to report issues, etc. This is different from the physical location (URL, disk drive, or server) of the document, which is the technical location of the document, which host may be delegated to the management of some other organization.
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| relatesTo | S Σ | 0..* | BackboneElement | There are no (further) constraints on this element Element idDocumentReference.relatesTo Relationships to other documents DefinitionRelationships that this document has with other document references that already exist. This element is labeled as a modifier because documents that append to other documents are incomplete on their own.
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| id | 0..1 | string | There are no (further) constraints on this element Element idDocumentReference.relatesTo.id Unique id for inter-element referencing DefinitionUnique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
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| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idDocumentReference.relatesTo.extension Additional content defined by implementations Alternate namesextensions, user content DefinitionMay 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. 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. Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints
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| modifierExtension | Σ ?! I | 0..* | Extension | There are no (further) constraints on this element Element idDocumentReference.relatesTo.modifierExtension Extensions that cannot be ignored even if unrecognized Alternate namesextensions, user content, modifiers DefinitionMay 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). 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. 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.
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| code | Σ | 1..1 | codeBinding | There are no (further) constraints on this element Element idDocumentReference.relatesTo.code replaces | transforms | signs | appends DefinitionThe type of relationship that this document has with anther document. If this document appends another document, then the document cannot be fully understood without also accessing the referenced document. The type of relationship between documents.
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| target | Σ I | 1..1 | Reference(S4hDocumentReference) | Element idDocumentReference.relatesTo.target Target of the relationship DefinitionThe target document of this relationship. 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. Reference(S4hDocumentReference) Constraints
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| description | S Σ | 0..1 | string | There are no (further) constraints on this element Element idDocumentReference.description Human-readable description DefinitionHuman-readable description of the source document. Helps humans to assess whether the document is of interest. What the document is about, a terse summary of the document.
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| securityLabel | Σ | 0..* | CodeableConceptBinding | There are no (further) constraints on this element Element idDocumentReference.securityLabel Document security-tags DefinitionA set of Security-Tag codes specifying the level of privacy/security of the Document. Note that DocumentReference.meta.security contains the security labels of the "reference" to the document, while DocumentReference.securityLabel contains a snapshot of the security labels on the document the reference refers to. Use of the Health Care Privacy/Security Classification (HCS) system of security-tag use is recommended. The confidentiality codes can carry multiple vocabulary items. HL7 has developed an understanding of security and privacy tags that might be desirable in a Document Sharing environment, called HL7 Healthcare Privacy and Security Classification System (HCS). The following specification is recommended but not mandated, as the vocabulary bindings are an administrative domain responsibility. The use of this method is up to the policy domain such as the XDS Affinity Domain or other Trust Domain where all parties including sender and recipients are trusted to appropriately tag and enforce. In the HL7 Healthcare Privacy and Security Classification (HCS) there are code systems specific to Confidentiality, Sensitivity, Integrity, and Handling Caveats. Some values would come from a local vocabulary as they are related to workflow roles and special projects. Security Labels from the Healthcare Privacy and Security Classification System.
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| content | S Σ | 1..1 | BackboneElement | Element idDocumentReference.content Document referenced DefinitionThe document and format referenced. There may be multiple content element repetitions, each with a different format. Smart4Health: The use and interpretation of multiple content elements is currently difficult and unclear. To avoid confusion and incorrect use, it is therefore restricted to a single element with the Smart4Health context.
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| id | 0..1 | string | There are no (further) constraints on this element Element idDocumentReference.content.id Unique id for inter-element referencing DefinitionUnique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
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| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idDocumentReference.content.extension Additional content defined by implementations Alternate namesextensions, user content DefinitionMay 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. 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. Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints
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| modifierExtension | Σ ?! I | 0..* | Extension | There are no (further) constraints on this element Element idDocumentReference.content.modifierExtension Extensions that cannot be ignored even if unrecognized Alternate namesextensions, user content, modifiers DefinitionMay 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). 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. 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.
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| attachment | S Σ I | 1..1 | S4hAttachment | Element idDocumentReference.content.attachment Content in a format defined elsewhere DefinitionFor referring to data content defined in other formats. When providing a summary view (for example with Observation.value[x]) Attachment should be represented with a brief display text such as "Signed Procedure Consent".
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| format | Σ | 0..1 | CodingBinding | There are no (further) constraints on this element Element idDocumentReference.content.format Format/content rules for the document DefinitionAn identifier of the document encoding, structure, and template that the document conforms to beyond the base format indicated in the mimeType. Note that while IHE mostly issues URNs for format types, not all documents can be identified by a URI. Document Format Codes.
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| context | S Σ | 0..1 | BackboneElement | There are no (further) constraints on this element Element idDocumentReference.context Clinical context of document DefinitionThe clinical context in which the document was prepared. These values are primarily added to help with searching for interesting/relevant documents.
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| id | 0..1 | string | There are no (further) constraints on this element Element idDocumentReference.context.id Unique id for inter-element referencing DefinitionUnique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
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| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idDocumentReference.context.extension Additional content defined by implementations Alternate namesextensions, user content DefinitionMay 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. 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. Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints
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| modifierExtension | Σ ?! I | 0..* | Extension | There are no (further) constraints on this element Element idDocumentReference.context.modifierExtension Extensions that cannot be ignored even if unrecognized Alternate namesextensions, user content, modifiers DefinitionMay 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). 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. 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.
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| encounter | S I | 0..* | Reference(EpisodeOfCare | S4hEncounter) | Element idDocumentReference.context.encounter Context of the document content DefinitionDescribes the clinical encounter or type of care that the document content is associated with. 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. Reference(EpisodeOfCare | S4hEncounter) Constraints
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| event | 0..* | CodeableConcept | There are no (further) constraints on this element Element idDocumentReference.context.event Main clinical acts documented DefinitionThis list of codes represents the main clinical acts, such as a colonoscopy or an appendectomy, being documented. In some cases, the event is inherent in the type Code, such as a "History and Physical Report" in which the procedure being documented is necessarily a "History and Physical" act. An event can further specialize the act inherent in the type, such as where it is simply "Procedure Report" and the procedure was a "colonoscopy". If one or more event codes are included, they shall not conflict with the values inherent in the class or type elements as such a conflict would create an ambiguous situation. This list of codes represents the main clinical acts being documented.
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| period | Σ I | 0..1 | Period | There are no (further) constraints on this element Element idDocumentReference.context.period Time of service that is being documented DefinitionThe time period over which the service that is described by the document was provided. A Period specifies a range of time; the context of use will specify whether the entire range applies (e.g. "the patient was an inpatient of the hospital for this time range") or one value from the range applies (e.g. "give to the patient between these two times"). Period is not used for a duration (a measure of elapsed time). See Duration.
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| facilityType | 0..1 | CodeableConcept | There are no (further) constraints on this element Element idDocumentReference.context.facilityType Kind of facility where patient was seen DefinitionThe kind of facility where the patient was seen. Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination. XDS Facility Type.
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| practiceSetting | 0..1 | CodeableConcept | There are no (further) constraints on this element Element idDocumentReference.context.practiceSetting Additional details about where the content was created (e.g. clinical specialty) DefinitionThis property may convey specifics about the practice setting where the content was created, often reflecting the clinical specialty. This is an important piece of metadata that providers often rely upon to quickly sort and/or filter out to find specific content. This element should be based on a coarse classification system for the class of specialty practice. Recommend the use of the classification system for Practice Setting, such as that described by the Subject Matter Domain in LOINC. Additional details about where the content was created (e.g. clinical specialty).
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| sourcePatientInfo | I | 0..1 | Reference(Patient) | There are no (further) constraints on this element Element idDocumentReference.context.sourcePatientInfo Patient demographics from source DefinitionThe Patient Information as known when the document was published. May be a reference to a version specific, or contained. 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.
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| related | I | 0..* | Reference(Resource) | There are no (further) constraints on this element Element idDocumentReference.context.related Related identifiers or resources DefinitionRelated identifiers or resources associated with the DocumentReference. May be identifiers or resources that caused the DocumentReference or referenced Document to be created.
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Snapshot view
Shows all constraints, including those from underlying profiles and the base resource definition.
| S4hDocumentReference (DocumentReference) | I | DocumentReference | There are no (further) constraints on this element Element idDocumentReference A reference to a document DefinitionA reference to a document of any kind for any purpose. Provides metadata about the document so that the document can be discovered and managed. The scope of a document is any seralized object with a mime-type, so includes formal patient centric documents (CDA), cliical notes, scanned paper, and non-patient specific documents like policy text. Usually, this is used for documents other than those defined by FHIR.
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| id | Σ | 0..1 | string | There are no (further) constraints on this element Element idDocumentReference.id Logical id of this artifact DefinitionThe logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes. The only time that a resource does not have an id is when it is being submitted to the server using a create operation. |
| meta | Σ | 0..1 | Meta | There are no (further) constraints on this element Element idDocumentReference.meta Metadata about the resource DefinitionThe 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.
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| implicitRules | Σ ?! | 0..1 | uri | There are no (further) constraints on this element Element idDocumentReference.implicitRules A set of rules under which this content was created DefinitionA 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. 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.
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| language | 0..1 | codeBinding | There are no (further) constraints on this element Element idDocumentReference.language Language of the resource content DefinitionThe base language in which the resource is written. 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). A human language.
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| text | 0..1 | Narrative | There are no (further) constraints on this element Element idDocumentReference.text Text summary of the resource, for human interpretation Alternate namesnarrative, html, xhtml, display DefinitionA 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. 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.
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| contained | 0..* | Resource | There are no (further) constraints on this element Element idDocumentReference.contained Contained, inline Resources Alternate namesinline resources, anonymous resources, contained resources DefinitionThese 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. 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.
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| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idDocumentReference.extension Additional content defined by implementations Alternate namesextensions, user content DefinitionMay 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. 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. Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints
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| modifierExtension | ?! I | 0..* | Extension | There are no (further) constraints on this element Element idDocumentReference.modifierExtension Extensions that cannot be ignored Alternate namesextensions, user content DefinitionMay 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). 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. 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. Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints
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| masterIdentifier | Σ | 0..1 | Identifier | There are no (further) constraints on this element Element idDocumentReference.masterIdentifier Master Version Specific Identifier DefinitionDocument identifier as assigned by the source of the document. This identifier is specific to this version of the document. This unique identifier may be used elsewhere to identify this version of the document. The structure and format of this Id shall be consistent with the specification corresponding to the formatCode attribute. (e.g. for a DICOM standard document a 64-character numeric UID, for an HL7 CDA format a serialization of the CDA Document Id extension and root in the form "oid^extension", where OID is a 64 digits max, and the Id is a 16 UTF-8 char max. If the OID is coded without the extension then the '^' character shall not be included.). CDA Document Id extension and root.
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| identifier | S Σ | 0..* | Identifier | There are no (further) constraints on this element Element idDocumentReference.identifier Other identifiers for the document DefinitionOther identifiers associated with the document, including version independent identifiers.
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| status | S Σ ?! | 1..1 | codeBinding | There are no (further) constraints on this element Element idDocumentReference.status current | superseded | entered-in-error DefinitionThe status of this document reference. This is the status of the DocumentReference object, which might be independent from the docStatus element. This element is labeled as a modifier because the status contains the codes that mark the document or reference as not currently valid. The status of the document reference.
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| docStatus | Σ | 0..1 | codeBinding | There are no (further) constraints on this element Element idDocumentReference.docStatus preliminary | final | amended | entered-in-error DefinitionThe status of the underlying document. The document that is pointed to might be in various lifecycle states. Status of the underlying document.
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| type | S Σ | 0..1 | CodeableConceptIPSBinding | Element idDocumentReference.type Concept - reference to a terminology or just text DefinitionA concept that may be defined by a formal reference to a terminology or ontology or may be provided by text. Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination. Precise type of clinical document.
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| category | S Σ | 0..* | CodeableConceptIPS | Element idDocumentReference.category Concept - reference to a terminology or just text Alternate namesclaxs DefinitionA concept that may be defined by a formal reference to a terminology or ontology or may be provided by text. Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination. High-level kind of a clinical document at a macro level.
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| subject | S Σ I | 0..1 | Reference(Group | Device | S4hPatient | PractitionerUvIps) | Element idDocumentReference.subject Who/what is the subject of the document DefinitionWho or what the document is about. The document can be about a person, (patient or healthcare practitioner), a device (e.g. a machine) or even a group of subjects (such as a document about a herd of farm animals, or a set of patients that share a common exposure). 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. Reference(Group | Device | S4hPatient | PractitionerUvIps) Constraints
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| date | S Σ | 1..1 | instant | Element idDocumentReference.date When this document reference was created Alternate namesindexed DefinitionWhen the document reference was created. Within the Smart4Health project, the creation date needed to properly place the document within a complete patient record. Referencing/indexing time is used for tracking, organizing versions and searching.
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| author | S Σ I | 0..* | Reference(Device | RelatedPerson | PractitionerUvIps | PractitionerRoleUvIps | S4hPatient | OrganizationUvIps) | Element idDocumentReference.author Who and/or what authored the document DefinitionIdentifies who is responsible for adding the information to the document. Not necessarily who did the actual data entry (i.e. typist) or who was the source (informant). Reference(Device | RelatedPerson | PractitionerUvIps | PractitionerRoleUvIps | S4hPatient | OrganizationUvIps) Constraints
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| authenticator | I | 0..1 | Reference(Practitioner | PractitionerRole | Organization) | There are no (further) constraints on this element Element idDocumentReference.authenticator Who/what authenticated the document DefinitionWhich person or organization authenticates that this document is valid. Represents a participant within the author institution who has legally authenticated or attested the document. Legal authentication implies that a document has been signed manually or electronically by the legal Authenticator. Reference(Practitioner | PractitionerRole | Organization) Constraints
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| custodian | S I | 0..1 | Reference(OrganizationUvIps) | Element idDocumentReference.custodian Organization which maintains the document DefinitionIdentifies the organization or group who is responsible for ongoing maintenance of and access to the document. Identifies the logical organization (software system, vendor, or department) to go to find the current version, where to report issues, etc. This is different from the physical location (URL, disk drive, or server) of the document, which is the technical location of the document, which host may be delegated to the management of some other organization.
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| relatesTo | S Σ | 0..* | BackboneElement | There are no (further) constraints on this element Element idDocumentReference.relatesTo Relationships to other documents DefinitionRelationships that this document has with other document references that already exist. This element is labeled as a modifier because documents that append to other documents are incomplete on their own.
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| id | 0..1 | string | There are no (further) constraints on this element Element idDocumentReference.relatesTo.id Unique id for inter-element referencing DefinitionUnique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
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| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idDocumentReference.relatesTo.extension Additional content defined by implementations Alternate namesextensions, user content DefinitionMay 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. 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. Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints
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| modifierExtension | Σ ?! I | 0..* | Extension | There are no (further) constraints on this element Element idDocumentReference.relatesTo.modifierExtension Extensions that cannot be ignored even if unrecognized Alternate namesextensions, user content, modifiers DefinitionMay 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). 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. 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.
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| code | Σ | 1..1 | codeBinding | There are no (further) constraints on this element Element idDocumentReference.relatesTo.code replaces | transforms | signs | appends DefinitionThe type of relationship that this document has with anther document. If this document appends another document, then the document cannot be fully understood without also accessing the referenced document. The type of relationship between documents.
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| target | Σ I | 1..1 | Reference(S4hDocumentReference) | Element idDocumentReference.relatesTo.target Target of the relationship DefinitionThe target document of this relationship. 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. Reference(S4hDocumentReference) Constraints
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| description | S Σ | 0..1 | string | There are no (further) constraints on this element Element idDocumentReference.description Human-readable description DefinitionHuman-readable description of the source document. Helps humans to assess whether the document is of interest. What the document is about, a terse summary of the document.
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| securityLabel | Σ | 0..* | CodeableConceptBinding | There are no (further) constraints on this element Element idDocumentReference.securityLabel Document security-tags DefinitionA set of Security-Tag codes specifying the level of privacy/security of the Document. Note that DocumentReference.meta.security contains the security labels of the "reference" to the document, while DocumentReference.securityLabel contains a snapshot of the security labels on the document the reference refers to. Use of the Health Care Privacy/Security Classification (HCS) system of security-tag use is recommended. The confidentiality codes can carry multiple vocabulary items. HL7 has developed an understanding of security and privacy tags that might be desirable in a Document Sharing environment, called HL7 Healthcare Privacy and Security Classification System (HCS). The following specification is recommended but not mandated, as the vocabulary bindings are an administrative domain responsibility. The use of this method is up to the policy domain such as the XDS Affinity Domain or other Trust Domain where all parties including sender and recipients are trusted to appropriately tag and enforce. In the HL7 Healthcare Privacy and Security Classification (HCS) there are code systems specific to Confidentiality, Sensitivity, Integrity, and Handling Caveats. Some values would come from a local vocabulary as they are related to workflow roles and special projects. Security Labels from the Healthcare Privacy and Security Classification System.
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| content | S Σ | 1..1 | BackboneElement | Element idDocumentReference.content Document referenced DefinitionThe document and format referenced. There may be multiple content element repetitions, each with a different format. Smart4Health: The use and interpretation of multiple content elements is currently difficult and unclear. To avoid confusion and incorrect use, it is therefore restricted to a single element with the Smart4Health context.
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| id | 0..1 | string | There are no (further) constraints on this element Element idDocumentReference.content.id Unique id for inter-element referencing DefinitionUnique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
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| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idDocumentReference.content.extension Additional content defined by implementations Alternate namesextensions, user content DefinitionMay 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. 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. Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints
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| modifierExtension | Σ ?! I | 0..* | Extension | There are no (further) constraints on this element Element idDocumentReference.content.modifierExtension Extensions that cannot be ignored even if unrecognized Alternate namesextensions, user content, modifiers DefinitionMay 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). 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. 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.
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| attachment | S Σ I | 1..1 | S4hAttachment | Element idDocumentReference.content.attachment Content in a format defined elsewhere DefinitionFor referring to data content defined in other formats. When providing a summary view (for example with Observation.value[x]) Attachment should be represented with a brief display text such as "Signed Procedure Consent".
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| format | Σ | 0..1 | CodingBinding | There are no (further) constraints on this element Element idDocumentReference.content.format Format/content rules for the document DefinitionAn identifier of the document encoding, structure, and template that the document conforms to beyond the base format indicated in the mimeType. Note that while IHE mostly issues URNs for format types, not all documents can be identified by a URI. Document Format Codes.
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| context | S Σ | 0..1 | BackboneElement | There are no (further) constraints on this element Element idDocumentReference.context Clinical context of document DefinitionThe clinical context in which the document was prepared. These values are primarily added to help with searching for interesting/relevant documents.
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| id | 0..1 | string | There are no (further) constraints on this element Element idDocumentReference.context.id Unique id for inter-element referencing DefinitionUnique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
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| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idDocumentReference.context.extension Additional content defined by implementations Alternate namesextensions, user content DefinitionMay 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. 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. Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints
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| modifierExtension | Σ ?! I | 0..* | Extension | There are no (further) constraints on this element Element idDocumentReference.context.modifierExtension Extensions that cannot be ignored even if unrecognized Alternate namesextensions, user content, modifiers DefinitionMay 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). 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. 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.
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| encounter | S I | 0..* | Reference(EpisodeOfCare | S4hEncounter) | Element idDocumentReference.context.encounter Context of the document content DefinitionDescribes the clinical encounter or type of care that the document content is associated with. 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. Reference(EpisodeOfCare | S4hEncounter) Constraints
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| event | 0..* | CodeableConcept | There are no (further) constraints on this element Element idDocumentReference.context.event Main clinical acts documented DefinitionThis list of codes represents the main clinical acts, such as a colonoscopy or an appendectomy, being documented. In some cases, the event is inherent in the type Code, such as a "History and Physical Report" in which the procedure being documented is necessarily a "History and Physical" act. An event can further specialize the act inherent in the type, such as where it is simply "Procedure Report" and the procedure was a "colonoscopy". If one or more event codes are included, they shall not conflict with the values inherent in the class or type elements as such a conflict would create an ambiguous situation. This list of codes represents the main clinical acts being documented.
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| period | Σ I | 0..1 | Period | There are no (further) constraints on this element Element idDocumentReference.context.period Time of service that is being documented DefinitionThe time period over which the service that is described by the document was provided. A Period specifies a range of time; the context of use will specify whether the entire range applies (e.g. "the patient was an inpatient of the hospital for this time range") or one value from the range applies (e.g. "give to the patient between these two times"). Period is not used for a duration (a measure of elapsed time). See Duration.
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| facilityType | 0..1 | CodeableConcept | There are no (further) constraints on this element Element idDocumentReference.context.facilityType Kind of facility where patient was seen DefinitionThe kind of facility where the patient was seen. Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination. XDS Facility Type.
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| practiceSetting | 0..1 | CodeableConcept | There are no (further) constraints on this element Element idDocumentReference.context.practiceSetting Additional details about where the content was created (e.g. clinical specialty) DefinitionThis property may convey specifics about the practice setting where the content was created, often reflecting the clinical specialty. This is an important piece of metadata that providers often rely upon to quickly sort and/or filter out to find specific content. This element should be based on a coarse classification system for the class of specialty practice. Recommend the use of the classification system for Practice Setting, such as that described by the Subject Matter Domain in LOINC. Additional details about where the content was created (e.g. clinical specialty).
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| sourcePatientInfo | I | 0..1 | Reference(Patient) | There are no (further) constraints on this element Element idDocumentReference.context.sourcePatientInfo Patient demographics from source DefinitionThe Patient Information as known when the document was published. May be a reference to a version specific, or contained. 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.
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| related | I | 0..* | Reference(Resource) | There are no (further) constraints on this element Element idDocumentReference.context.related Related identifiers or resources DefinitionRelated identifiers or resources associated with the DocumentReference. May be identifiers or resources that caused the DocumentReference or referenced Document to be created.
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