| Format/length: | an6 | 
| HES item: | |
| National Codes: | |
| Default Codes: | 
Notes:
Definition:
This is a mandatory data element and reflects the version number of the message in use. Message version numbers are updated as required during the on-going message development processes.
Permitted National Codes:
| NHS003 | The 2000 / 2001 Specification | ||
| NHS004 | The 2004 / 2005 CDS-XML Specification | ||
| NHS005 | The 2005 / 2006 CDS-XML Specification | For implementation of XML messaging in the Secondary Uses Service | |
| CDS006 | The 2007 CDS-XML Specification | Note the change to the prefix CDS | 
Usage:
Interchanges must only contain CDS Messages of the same CDS MESSAGE VERSION NUMBER and each and every CDS TYPE must contain a CDS MESSAGE VERSION NUMBER.
This data element is also known by these names:
| Context | Alias | 
|---|---|
| plural | CDS MESSAGE VERSION NUMBERS | 

