This table lists profiles and extenions for the CodeSystem resource. For background information, see 
Profiling Resources and Extensibility.
Additional profiles and resources may be found in published 
Implementation Guides  , or in the 
Conformance resource registry
, or in the 
Conformance resource registry  .
.
| ShareableCodeSystem | Enforces the minimum information set for the value set metadata required by HL7 and other organisations that share and publish value sets | for Shareable CodeSystem | 
| codesystem-author | User or Org actually involved in creating the value set content | for CodeSystem HL7 Extensions | 
| codesystem-comment | Human-specified notes and other documentation | for CodeSystem HL7 Extensions | 
| codesystem-comments | Comment about the use of this code in this context | for CodeSystem HL7 Extensions | 
| codesystem-conceptOrder | Appearance order for user selection | for CodeSystem HL7 Extensions | 
| codesystem-deprecated | Whether the concept has been deprecated | for CodeSystem HL7 Extensions | 
| codesystem-effectiveDate | When the value set version becomes Active and is available for use | for CodeSystem HL7 Extensions | 
| codesystem-expirationDate | When the value set version should no longer be used | for CodeSystem HL7 Extensions | 
| codesystem-history | What has happened over time | for CodeSystem HL7 Extensions | 
| codesystem-keyWord | Descriptors and key terms for search | for CodeSystem HL7 Extensions | 
| codesystem-label | E.g. "(a)", "1.", etc. | for CodeSystem HL7 Extensions | 
| codesystem-map | A concept map relevant to interpret this value set | for CodeSystem HL7 Extensions | 
| codesystem-ordinalValue | Comparison value for ordinal codes | for CodeSystem HL7 Extensions | 
| codesystem-otherName | Alternative names | for CodeSystem HL7 Extensions | 
| codesystem-replacedby | A code that replaces this | for CodeSystem HL7 Extensions | 
| codesystem-sourceReference | Where did this content come from | for CodeSystem HL7 Extensions | 
| codesystem-subsumes | Codes that this concept subsumes that have already been declared elsewhere | for CodeSystem HL7 Extensions | 
| codesystem-trusted-expansion | Reference to a trusted expansion | for CodeSystem HL7 Extensions | 
| codesystem-usage | Who has used and how? | for CodeSystem HL7 Extensions | 
| codesystem-warning | Extra warning about the correct use of the value set | for CodeSystem HL7 Extensions | 
| codesystem-workflowStatus | Indicates the state of development of the value set | for CodeSystem HL7 Extensions | 
| resource-approvalDate | When resource approved by publisher | for Resource HL7 Extensions | 
| resource-effectivePeriod | The effective date range for the resource | for Resource HL7 Extensions | 
| resource-lastReviewDate | Last review date for the resource | for Resource HL7 Extensions | 
| No Search Extensions defined for this resource |