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

# composition_attester

A participant who has attested to the accuracy of the composition/document (`Composition.attester[]`).

**Primary Keys:** composition\_attester\_id

**Foreign Keys:**

* composition\_id - links to the [composition](/medical-api/handling-data/schema-v100/composition/base) table

| Column                    | Data Type | Description                                                |
| ------------------------- | --------- | ---------------------------------------------------------- |
| composition\_attester\_id | varchar   | Unique identifier for the attester row                     |
| composition\_id           | varchar   | Parent composition                                         |
| mode                      | varchar   | Attestation mode (e.g., legal, professional)               |
| time                      | datetime  | When the attestation occurred                              |
| party\_reference\_id      | varchar   | Resolved ID of the attester (e.g. Practitioner or Patient) |
| party\_reference\_type    | varchar   | Type of referenced resource (e.g. Practitioner, Patient)   |

**Related Tables:**

**Parent:**

* [composition](/medical-api/handling-data/schema-v100/composition/base)