# Alternate Character Set Handling Scheme (2.5.1 - 1.1.0) - HL7 v2.5.1 Vocabulary v0.1.0

* [**Table of Contents**](toc.md)
* [**Artifacts Summary**](artifacts.md)
* **Alternate Character Set Handling Scheme (2.5.1 - 1.1.0)**

## CodeSystem: Alternate Character Set Handling Scheme (2.5.1 - 1.1.0) (Experimental) 

| | |
| :--- | :--- |
| *Official URL*:http://terminology.hl7.org/v2plusvocab/CodeSystem/alternateCharacterSetHandlingScheme | *Version*:1.1.0 |
| Active as of 2026-01-27 | *Computable Name*:AlternateCharacterSetHandlingScheme |
| *Other Identifiers:*OID:2.16.840.1.113883.18.216 | |
| **Copyright/Legal**: HL7 Inc., 2026 | |

 
HL7-defined code system of concept that specify the scheme used when any alternative character sets are specified in the second or later iterations of MSH-18 Character Set, and if any special handling scheme is needed. Used in HL7 Version 2.x messaging in the MSH segment. 

 This Code system is referenced in the content logical definition of the following value sets: 

* [Hl7VSalternateCharacterSetHandlingScheme](ValueSet-hl7VSalternateCharacterSetHandlingScheme.md)



## Resource Content

```json
{
  "resourceType" : "CodeSystem",
  "id" : "alternateCharacterSetHandlingScheme",
  "extension" : [
    {
      "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-v2versionCreated",
      "valueString" : "2.5.1"
    },
    {
      "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-versionHistory",
      "valueString" : "generate correct history somehow"
    },
    {
      "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-tableNo",
      "valueString" : "0356"
    }
  ],
  "url" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/alternateCharacterSetHandlingScheme",
  "identifier" : [
    {
      "system" : "urn:ietf:rfc:3986",
      "value" : "urn:oid:2.16.840.1.113883.18.216"
    }
  ],
  "version" : "1.1.0",
  "name" : "AlternateCharacterSetHandlingScheme",
  "title" : "Alternate Character Set Handling Scheme (2.5.1 - 1.1.0)",
  "status" : "active",
  "experimental" : true,
  "date" : "2026-01-27T19:29:18+00:00",
  "publisher" : "HL7/FO",
  "contact" : [
    {
      "name" : "HL7/FO",
      "telecom" : [
        {
          "system" : "url",
          "value" : "http://www.hl7.org"
        }
      ]
    }
  ],
  "description" : "HL7-defined code system of concept that specify the scheme used when any alternative character sets are specified in the second or later iterations of MSH-18 Character Set, and if any special handling scheme is needed.  Used in HL7 Version 2.x messaging in the MSH segment.",
  "copyright" : "HL7 Inc., 2026",
  "caseSensitive" : true,
  "compositional" : false,
  "content" : "complete",
  "property" : [
    {
      "code" : "versionIntroduced",
      "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionIntroduced",
      "description" : "version when was this code introduced",
      "type" : "string"
    },
    {
      "code" : "versionDeprecated",
      "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionDeprecated",
      "description" : "version when was this code deprecated",
      "type" : "string"
    },
    {
      "code" : "status",
      "uri" : "http://hl7.org/fhir/concept-properties#status",
      "description" : "A code that indicates the status of the concept. Typical values are active, experimental, deprecated, and retired",
      "type" : "code"
    },
    {
      "code" : "comment",
      "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#comment",
      "description" : "A string that provides additional detail pertinent to the use or understanding of the concept",
      "type" : "string"
    },
    {
      "code" : "usage",
      "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#usage",
      "description" : "usage notes for this code",
      "type" : "string"
    },
    {
      "code" : "modified",
      "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#modified",
      "description" : "date of last modification",
      "type" : "dateTime"
    }
  ],
  "concept" : [
    {
      "code" : "2.3",
      "display" : "The character set switching mode specified in HL7 2.5",
      "definition" : "The character set switching mode specified in HL7 2.5, section 2.7.2, âEscape sequences supporting multiple character setsâ and section 2.A.46, \"XPN - extended person name\".",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.3.1"
        }
      ]
    },
    {
      "code" : "ISO 2022-1994",
      "display" : "This standard is titled \"Information Technology - Character Code Structure and Extension Technique\".",
      "definition" : "This standard is titled \"Information Technology - Character Code Structure and Extension Technique\". .",
      "property" : [
        {
          "code" : "versionIntroduced",
          "valueString" : "2.3.1"
        }
      ]
    }
  ]
}

```
