> ## 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>