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Specifications and downloads

Find out about the different themes and download their required specifications.

The Interoperability Toolkit (ITK) release 2 specifications are available for download by registering on our distribution portal TRUD. By registering interest in the ITK distribution packs we will keep you informed when changes or new releases become available.

Four specification packs are required, in addition to each of the themes:

Theme title Description Download required specifications
Clinical Correspondence Clinical Correspondence - specifications for the exchange of a variety of clinical documents, including discharge summaries and outpatient letters. The specification details how HL7 Clinical Document Architecture (CDA) is constructed, together with the templates and code sets expected within the document. Interoperability Correspondence
Telehealth Personal Health Monitoring PHMR supports the exchange of summary monitoring data between a Telehealth remote monitoring management system and a clinical record. Telehealth Domain Message Specifications
Health and Social Care Integration Personalised assessment and care and support planning process, supported by information sharing between NHS and social care IT systems. This includes Assessment with Care and Support Planning, Hospital Discharge Notifications to Social Care and NHS Continuing Healthcare.  Health and Social Care Integration Domain Message Specification
Clinical Dashboards Support of transmission of commissioning/performance data including measurements of quality of patient care, performance monitoring, operational effectiveness, clinical outcomes and patient experience. Interoperability Dashboards
Admission, Discharge and Transfer (ADT HL7v2) Implementation and accreditation of the ITK 2 specifications for the transfer of admission, discharge and transfer administrative information. Traditionally found in PAS to departmental system interfaces. ITK HL7 V2 Message Specification
Spine Mini Services Spine Mini Services specifications define interaction with NHS National Services (Spine). This includes, for example, services that allow interaction with the Personal Demographic Services (PDS). ITK Spine Mini Services
Child Screening A Domain Message Specification to carry the results of child screening tests. Currently the message supports blood spot screening 

Interoperability Correspondence
Child Screening Domain Message Specifications

Notifications Notification to patients as part of co-ordinating care of key events/changes to care plan, or unscheduled care encounter for patients   Notifications Domain Message Specification
Document Retrieval  System document retrieval for remote systems and repositories when required after notification about events or changes to key patient information.  Document Retrieval Domain Message Specification
End of Life Care Document  This is a standard clinical (CDA) document to allow the sending of end of life care preferences as defined in the national information standard for electronic palliative care co-ordination: ISB1580.  End of Life Domain Message Specification

If you have any questions about the specifications, please contact

We've recently published a reference implementation for some of the elements of ITK, which is aimed at developers and organisations involved with ITK-based solutions. It provides examples that aim to help you understand the specifications. You can access this resource on our developer network.

If you would like to progress towards ITK accreditation for your product, contact We can provide advice about your approach and the resources required.

Last edited: 28 January 2019 11:08 am