# What information is included in the DIVOC certificate?

DIVOC’s W3C-based digital certificate consists of three core components:

1. Credential metadata (schema version credential/certificate ID, etc). 
2. Claim (vaccination event details). 
3. Proof (issuer details, date of issue, time stamp, signature, etc).

![Credit: Figure taken from W3C Verifiable Credentials Data Model v1.1](https://3981476102-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FBzDN8TNEi1Pzc9yUiD8a%2Fuploads%2FAhiQPNdpfJbxCdHGJ9Zx%2FScreenshot%202022-01-27%20at%2010.14.26%20AM.png?alt=media\&token=b95cae9c-597c-4a79-8535-5dcd19b74ac3)

### Data structure

The DIVOC digital certificate QR code includes the following data structure:

| Basic components                                       | Information sections         | Description                                                                                                                    |
| ------------------------------------------------------ | ---------------------------- | ------------------------------------------------------------------------------------------------------------------------------ |
| <ol><li><strong>Credential metadata</strong></li></ol> | Certificate context          | Sets the context, which establishes the special terms.                                                                         |
|                                                        | Certificate identifier       | Specifies the identifier for the credential.                                                                                   |
|                                                        | Credential type              | Declares what data to expect in the credential.                                                                                |
|                                                        |                              |                                                                                                                                |
| 2. **Claim**                                           | Credential subject           | Assertion about the subjects of the credentials.                                                                               |
|                                                        | Event block                  | When the credential was issued.                                                                                                |
|                                                        | Issuer details               | The entity that issued the credential.                                                                                         |
|                                                        |                              |                                                                                                                                |
| 3. **Proof**                                           | Signature type               | Digital proof that makes the credential tamper-evident. Cryptographic signature suite that was used to generate the signature. |
|                                                        | Date of signature            | When the signature was created.                                                                                                |
|                                                        | Digital signature value      |                                                                                                                                |
|                                                        | Identifier of the public key | That can verify the signature.                                                                                                 |

### Sample certificate payload

To illustrate the data structure of DIVOC certificate outputs, a sample certificate payload is outlined below:

![](https://3981476102-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FBzDN8TNEi1Pzc9yUiD8a%2Fuploads%2Fpd3KSyQ7vE5Xwr5DpAL0%2FScreenshot%202022-03-02%20at%203.49.59%20PM.png?alt=media\&token=4cae4f9d-4adb-418d-8edf-3e4333c21e40)

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