US Core Implementation Guide
6.1.0 - STU6
US Core Implementation Guide
6.1.0 - STU6
This page is part of the US Core (v6.1.0: STU6 Update) based on FHIR R4. This is the current published version in its permanent home (it will always be available at this URL). For a full list of available versions, see the Directory of published versions 
| Active as of 2022-11-16 |
Definitions for the us-core-direct extension.
Guidance on how to interpret the contents of this table can be found here.
| 1. Extension | |
| Definition | This email address is associated with a "Direct Secure Messaging" service. This extension can only be used on contact points where the system = 'email' Optional Extension Element - found in all resources. |
| Control | 0..1* |
| Comments | This extension can only be used on contact points where the system = 'email'. |
| 2. Extension.url | |
| Fixed Value | http://hl7.org/fhir/us/core/StructureDefinition/us-core-direct |
| 3. Extension.value[x] | |
| Control | 10..1 |
| Type | Choice of: , date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, Expression, Signature, unsignedInt, time |
| [x] Note | See Choice of Data Types for further information about how to use [x] |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
Guidance on how to interpret the contents of this table can be found here.
| 1. Extension | |
| Definition | This email address is associated with a "Direct Secure Messaging" service. This extension can only be used on contact points where the system = 'email' Optional Extension Element - found in all resources. |
| Control | 0..1* This element is affected by the following invariants: ele-1 |
| Comments | This extension can only be used on contact points where the system = 'email'. |
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists()) |
| 2. Extension.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. |
| Control | 1..1 |
| Type | uri |
| XML Representation | In the XML format, this property is represented as an attribute. |
| Summary | false |
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. |
| Fixed Value | http://hl7.org/fhir/us/core/StructureDefinition/us-core-direct |
| 3. Extension.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
| Control | 10..1 |
| Type | Choice of: boolean, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, Expression, Signature, unsignedInt, time |
| [x] Note | See Choice of Data Types for further information about how to use [x] |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Summary | false |
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) |
Guidance on how to interpret the contents of this table can be found here.
| 1. Extension | |
| Definition | This email address is associated with a "Direct Secure Messaging" service. This extension can only be used on contact points where the system = 'email' |
| Control | 0..1 This element is affected by the following invariants: ele-1 |
| Comments | This extension can only be used on contact points where the system = 'email'. |
| 2. Extension.id | |
| Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. |
| Control | 0..1 |
| Type | string |
| XML Representation | In the XML format, this property is represented as an attribute. |
| Summary | false |
| 3. Extension.extension | |
| Definition | May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. |
| Control | 0..* |
| Type | Extension |
| Summary | false |
| Alternate Names | extensions, user content |
| Comments | There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. |
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists()) |
| Slicing | This element introduces a set of slices on Extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators:
|
| 4. Extension.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. |
| Control | 1..1 |
| Type | uri |
| XML Representation | In the XML format, this property is represented as an attribute. |
| Summary | false |
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. |
| Fixed Value | http://hl7.org/fhir/us/core/StructureDefinition/us-core-direct |
| 5. Extension.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
| Control | 1..1 |
| Type | boolean |
| [x] Note | See Choice of Data Types for further information about how to use [x] |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Summary | false |
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) |
IG © 2023+ HL7 International - Cross-Group Projects. Package hl7.fhir.us.core#6.1.0 based on FHIR 4.0.1. Generated 2023-06-30
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