> ## Documentation Index
> Fetch the complete documentation index at: https://help.elationhealth.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Message Header (MSH)

| seq | type | opt | description | value |
| - | - | - | - | - |
| 1 | | R | Field Separator | \| |
| 2 | | R | Encoding Characters | ^\~& |
| 3 | | R | Sending Application | |
| 4 | | R | Sending Facility | |
| 5 | | R | Receiving Application | |
| 6 | | R | Receiving Facility | |
| 7 | `YYYYMMDDhhmm` | R | Date/Time of Message | |
| 9 | | R | Message Type | ORM^O01 |
| 12 | | R | Version ID | 2.3 |

<CodeGroup>
  ```text text theme={null}
  MSH|^~\&|ELATION|ABC1234|LABAPP|LABID1234|201805171707||ORM^O01||P|2.3
  ```
</CodeGroup>