The Generic CDA Domain Message Specification contains details on the "on-the-wire" format for CDA payloads. The "on-the-wire" format is the actual payload structure that is sent to a recipient. The Generic CDA Domain Message Specification documents two "on-the-wire" CDA formats. The first is for use over the Transaction Messaging System (TMS) when using TMS wrappers, this is documented in the Generic CDA Domain Message Specification as "NPfIT CDA RMIM - POCD_MT000001UK04". The second is used for non-TMS usage and is documented in the Generic CDA Domain Message Specification as "NHS CDA RMIM - POCD_MT000002UK01".

The Nullification Domain Message Specification contains details on how to nullify a CDA document that was, for example, sent in error or a document that is not accepted by a recipient. The domain specifies the message definition of the nullification document ("Nullification Document - POCD_MT130001UK05"), which is generically used to nullify any CDA document.

The Distribution Envelope Specification defines the constraints to be applied to the distribution envelope when used with ITK Correspondence content.

This pack gives guidance on the use of tags and attributes used in a CDA text section (also called CDA markup).The content of this pack is based on the schema "NarrativeBlock.xsd", which is included in Domain Message Specifications in the "dt" folder. This schema is included in the Generic CDA and Profile schemas to ensure the correct CDA mark-up has been applied to the text element within the section class.

Technical Guidance for Templated CDA Domains gives detailed technical information required to implement a HSCIC CDA templated domain. This document only forms part of the documentation required to implement a HSCIC CDA domain and should be used in conjunction with the message specification and the domain baseline document set.

This document provides guidance for creating a 111 CDA document. The document includes the information that a 111 system needs to transmit to create a clinical document. The CDA document is used in 111 as a referral to Out of Hours services and to Accident and Emergency, to inform a patient’s General Practitioner about a 111 call, and to inform a repeat caller database to monitor repeat calls to the NHS 111 service.

This document provides guidance for creating an NHS 111 Ambulance Request message, that can also be used for a CAD to CAD Ambulance Rest. The document includes the information that an NHS 111 system (or CAD) needs to supply to create the request.

This document provides guidance for creating an NHS 111 Repeat Caller Query message. The document includes the information that an NHS 111 system needs to supply to create the query..