Schema ID
https://gobl.org/draft-0/pay/instructions#/$defs/Online
Properties
| Title | Property | Type | Req. | Description |
|---|---|---|---|---|
| Key | key | cbc.Key | Key identifier for this online payment method. | |
| Label | label | string | Descriptive label for the online provider. | |
| URL | url | string | true | URL to be used for payment. |