| Left: | US Core Direct email Extension (http://hl7.org/fhir/us/core/StructureDefinition/us-core-direct) | 
| Right: | US Core Direct email Extension (http://hl7.org/fhir/us/core/StructureDefinition/us-core-direct) | 
| Error | StructureDefinition.version | Values for version differ: '5.0.1' vs '8.0.0-ballot' | 
| Information | StructureDefinition.date | Values for date differ: '2019-05-21' vs '2022-11-16' | 
| Information | StructureDefinition.publisher | Values for publisher differ: 'HL7 International - Cross-Group Projects' vs 'HL7 International / Cross-Group Projects' | 
| Information | StructureDefinition.short | Values for short differ: 'Email is a 'direct' email' vs 'Email is a 'Direct' email' | 
| Information | StructureDefinition.definition | Values for definition differ: 'This email address is associated with a 'direct' service - e.g. http://wiki.directproject.org/Addressing+Specification. This extension can only be used on contact points where the system = 'email'' vs 'This email address is associated with a 'Direct Secure Messaging' service. This extension can only be used on contact points where the system = 'email'' | 
| Name | Value | Comments | |
|---|---|---|---|
|  abstract | false | ||
|  baseDefinition | http://hl7.org/fhir/StructureDefinition/Extension | ||
|  copyright | Used by permission of HL7 International, all rights reserved Creative Commons License | ||
|  date | 2019-05-21 | 2022-11-16 | 
 | 
|  description | This email address is associated with a [direct](http://wiki.directproject.org/Addressing+Specification) service. This extension can only be used on contact points where the system = 'email' | This email address is associated with a ["Direct Secure Messaging"](https://directtrust.org/what-we-do/direct-secure-messaging) service. This extension can only be used on contact points where the system = 'email' | 
 | 
|  experimental | |||
|  fhirVersion | 4.0.1 | ||
|  jurisdiction | |||
|   jurisdiction[0] | urn:iso:std:iso:3166#US | ||
|  kind | complex-type | ||
|  name | USCoreDirectEmailExtension | ||
|  publisher | HL7 International - Cross-Group Projects | HL7 International / Cross-Group Projects | 
 | 
|  purpose | |||
|  status | active | ||
|  title | US Core Direct email Extension | ||
|  type | Extension | ||
|  url | http://hl7.org/fhir/us/core/StructureDefinition/us-core-direct | ||
|  version | 5.0.1 | 8.0.0-ballot | 
 | 
| Name | L Flags | L Card. | L Type | L Description & Constraints | R Flags | R Card. | R Type | R Description & Constraints | Comments  | 
|---|---|---|---|---|---|---|---|---|---|
|   Extension | 0..1 | Extension | Email is a "direct" email | 0..1 | Extension | Email is a "Direct" email | |||
|    id | 0..1 | string | Unique id for inter-element referencing | 0..1 | string | Unique id for inter-element referencing | |||
|    Slices for extension | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url | |||
|    url | 1..1 | uri | "http://hl7.org/fhir/us/core/StructureDefinition/us-core-direct" | 1..1 | uri | "http://hl7.org/fhir/us/core/StructureDefinition/us-core-direct" | |||
|    value[x] | 1..1 | boolean | Value of extension | 1..1 | boolean | Value of extension | |||
|  Documentation for this format | |||||||||