CDex Signature Profile

This Signature DataType profile enforces the various elements of signature documented in the CDex guide. It adds the following *mandatory* (min=1) constraints:

• A `Signature.type` fixed to ASTM Standard, E1762-95(2013) code = “1.2.840.10065.1.12.1.5” (Verification Signature)
• A `Signature.who` for the organization or practitioner who signed the Bundle which is either:

1. a reference to US-Core Practitioner, US-Core PractitionerRole, or US-Core Organization or 1. an NPI or Tax ID and name of the organization or practitioner

• A `Signature.data` representing the base64 encoded Signature (JWS, image, etc)

In addition, the following *mandatory* (min=1) element is inherited from the base standard:

• `Signature.when` - a system timestamp when the signature was created