2.2 Out of Scope for the Guide

• Details on implementation of The Direct Standard®.

• Details on how the Initiating System identifies the Direct address of the recipient.

• Subscription approaches that could be utilized in the notification process.

• Specific expected workflow behavior of Recipient Systems.

• Detailed specifications for standards-based Message Content Payloads or encapsulated content types.

• Notifications requiring interactive responses from recipients, e.g. request notifications, although similar information exchange mechanisms could apply.

• Guidance for implementers on additional Message Content Payloads or encapsulated content types in support of recipient workflow/routing. For additional information on this topic, consult the Context IG.

• Definitions of filtering mechanisms for specific event types by any actor are out of scope.