---
type: "codesystem"
title: "Unknown Content Code"
codesystem: "unknown-content-code"
---
# Unknown Content Code

- **Official URL**: http://hl7.org/fhir/unknown-content-code
- **Version**: 6.0.0
- **Name**: UnknownContentCode
- **Title**: Unknown Content Code
- **Description**: UnknownContentCode

## Concepts

| Code | Display | Definition |
| --- | --- | --- |
| no | Neither Elements or Extensions | The application does not accept either unknown elements or extensions. |
| extensions | Unknown Extensions | The application accepts unknown extensions, but not unknown elements. |
| elements | Unknown Elements | The application accepts unknown elements, but not unknown extensions. |
| both | Unknown Elements and Extensions | The application accepts unknown elements and extensions. |

## CodeSystem XML



```xml
<?xml version="1.0" encoding="UTF-8"?>

<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="unknown-content-code"/>
  <meta>
    
  </meta>
  <url value="http://hl7.org/fhir/unknown-content-code"/>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.4.197"/>
  </identifier>
  <identifier>
    <use value="old"/>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.1.187"/>
  </identifier>
  <identifier>
    <use value="old"/>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.2.93"/>
  </identifier>
  <version value="6.0.0"/>
  <name value="UnknownContentCode"/>
  <title value="Unknown Content Code"/>
  <experimental value="false"/>
  <description value="UnknownContentCode"/>
  <concept>
    <code value="no"/>
    <display value="Neither Elements or Extensions"/>
    <definition value="The application does not accept either unknown elements or extensions."/>
  </concept>
  <concept>
    <code value="extensions"/>
    <display value="Unknown Extensions"/>
    <definition value="The application accepts unknown extensions, but not unknown elements."/>
  </concept>
  <concept>
    <code value="elements"/>
    <display value="Unknown Elements"/>
    <definition value="The application accepts unknown elements, but not unknown extensions."/>
  </concept>
  <concept>
    <code value="both"/>
    <display value="Unknown Elements and Extensions"/>
    <definition value="The application accepts unknown elements and extensions."/>
  </concept>
</CodeSystem>
```