# US Core Authentication Time Extension - US Core Implementation Guide v9.0.0

* [**Table of Contents**](toc.md)
* [**Artifacts Summary**](artifacts.md)
* **US Core Authentication Time Extension**

## Extension: US Core Authentication Time Extension 

| | | |
| :--- | :--- | :--- |
| *Official URL*:http://hl7.org/fhir/us/core/StructureDefinition/us-core-authentication-time | *Version*:9.0.0 | |
| * Standards status: *[Deprecated](http://hl7.org/fhir/R4/versions.html#std-process) | [Maturity Level](changes-between-versions.md#us-core-maturity-levels): 2 | *Computable Name*:USCoreAuthenticationTimeExtension |
| *Other Identifiers:*OID:2.16.840.1.113883.4.642.40.2.42.6 | | |

This extension indicates when the information in the document was verified.

**Context of Use**

**Usage info**

**Usages:**

* This Extension is not used by any profiles in this Specification

You can also check for [usages in the FHIR IG Statistics](https://packages2.fhir.org/xig/resource/hl7.fhir.us.core|current/StructureDefinition/StructureDefinition-us-core-authentication-time.json)

**Changes since version 8.0.1:**

* The resource metadata has changed (status, copyright)

### Formal Views of Extension Content

 [Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work](http://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#structure-definitions). 

 

Other representations of profile: [CSV](StructureDefinition-us-core-authentication-time.csv), [Excel](StructureDefinition-us-core-authentication-time.xlsx), [Schematron](StructureDefinition-us-core-authentication-time.sch) 

#### Constraints



## Resource Content

```json
{
  "resourceType" : "StructureDefinition",
  "id" : "us-core-authentication-time",
  "extension" : [{
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode" : "deprecated",
    "_valueCode" : {
      "extension" : [{
        "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status-reason",
        "valueMarkdown" : "THe US Core Authentication Time Extension extension has been superseded by the standard [Cross-version Extension for R5.DocumentReference.attester for use in FHIR R4](https://hl7.org/fhir/uv/xver-r5.r4/0.0.1-snapshot-2/StructureDefinition-ext-R5-DocumentReference.attester.html) and is deprecated. It **SHOULD NOT** be used for new or revised content. It is retained for historical/backward compatibility purposes. Implementers **SHOULD** use the FHIR R5 DocumentReference.attester extension instead"
      }]
    }
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger" : 2
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode" : "cgp"
  }],
  "url" : "http://hl7.org/fhir/us/core/StructureDefinition/us-core-authentication-time",
  "identifier" : [{
    "system" : "urn:ietf:rfc:3986",
    "value" : "urn:oid:2.16.840.1.113883.4.642.40.2.42.6"
  }],
  "version" : "9.0.0",
  "name" : "USCoreAuthenticationTimeExtension",
  "title" : "US Core Authentication Time Extension",
  "status" : "retired",
  "date" : "2024-10-07",
  "publisher" : "HL7 International / Cross-Group Projects",
  "contact" : [{
    "name" : "HL7 International / Cross-Group Projects",
    "telecom" : [{
      "system" : "url",
      "value" : "http://www.hl7.org/Special/committees/cgp"
    },
    {
      "system" : "email",
      "value" : "cgp@lists.HL7.org"
    }]
  }],
  "description" : "This extension indicates when the information in the document was verified.",
  "jurisdiction" : [{
    "coding" : [{
      "system" : "urn:iso:std:iso:3166",
      "code" : "US"
    }]
  }],
  "fhirVersion" : "4.0.1",
  "mapping" : [{
    "identity" : "rim",
    "uri" : "http://hl7.org/v3",
    "name" : "RIM Mapping"
  }],
  "kind" : "complex-type",
  "abstract" : false,
  "context" : [{
    "type" : "element",
    "expression" : "DocumentReference"
  }],
  "type" : "Extension",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation" : "constraint",
  "differential" : {
    "element" : [{
      "id" : "Extension",
      "path" : "Extension",
      "short" : "Authentication time",
      "definition" : "When the information in the document was verified.",
      "min" : 0,
      "max" : "*"
    },
    {
      "id" : "Extension.extension",
      "path" : "Extension.extension",
      "max" : "0"
    },
    {
      "id" : "Extension.url",
      "path" : "Extension.url",
      "fixedUri" : "http://hl7.org/fhir/us/core/StructureDefinition/us-core-authentication-time"
    },
    {
      "id" : "Extension.value[x]",
      "path" : "Extension.value[x]",
      "min" : 1,
      "type" : [{
        "code" : "dateTime"
      }]
    }]
  }
}

```
