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Specification References
The following specifications and resources hold information that is relevant to this Framework and form the foundation upon which this Framework is dependent.
| Resource or Specification | Description of Relevance |
| ANSI - DS2019-01-100-2021 - Applicability Statement for Secure Health Transport v1.3 | The base standard for Direct Secure Messaging |
| Implementation Guide for Delivery Notifications for Direct Secure Messaging v1.0 | The message notification options for Direct Secure Messaging |
| Implementation Guide for Direct Edge Protocols v2.0 | The required and optional Edge Protocols supported by HISPs. |
| XDR and XDM for Direct Secure Messaging Specification v2.0 | Detailed implementation guidance for representing payload metadata in a Direct message for Edge systems that support XDR/XDM. |
| Implementation Guide for Expressing Context for Direct Secure Messaging V.2.0 | Detailed implementation guidance for an alternative approach to representing payload metadata in a Direct message for Edge Systems that don’t support XDR/XDM. |
| Certificate Discovery | The component of the Direct Standard® which describes implementation guidance for certificate discovery. |