IHTSDO delivering SNOMED CT

SNOMED CT® Document Library

Documents provided with the SNOMED CT release. Individually elements of these documents may be formally approved specifications or guidance. However, the documents may also include draft material. The status of each document or section is indicated either by a textual status note or using colored symbols explained in the document preface.

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Starter Guide
The best place to start learning about SNOMED CT or to refresh existing knowledge. An overview of a range of topics related to the terminology.
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Technical Implementation Guide
Detailed specifications or release files and other IHTSDO standards, accompanied by guidance about various topics related to implementation of SNOMED CT.
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Frequently Asked Questions
Frequently asked questions about SNOMED CT.
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Editorial Guide
Detailed information about SNOMED CT content development. SNOMED CT CT, hierarchies, defining relationships and content model.
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IHTSDO Glossary
The glossary of terms used in these and other documents about SNOMED CT and IHTSDO.
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ICD-10 Mapping Specification
The specification for the SNOMED CT to ICD-10 Maps and Guidance on implementation of this specification.
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Release Format 1 Guide
The specification of the old SNOMED CT release format and guidance on its use. The specification is published for those still using the old format. ** Note RF1 is not longer being maintained or developed as it was replaced by RF2 in 2012 **
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SNOMED CT Diagramming Guideline
This document describes a diagrammatic notation for representing the definition of a concept, an expression, or relation between expressions within SNOMED CT. See also 'SNOMED CT Diagramming Guideline Templates' on the Tooling Documentation tab of the Document Library.
H
SNOMED CT URI Standard
This document provides a specification for the format and usage of SNOMED CT URIs. Such a URI might identify "A clinical idea to which a unique Concept Identifier has been assigned"1. However, it does not specify or standardise any aspect of the representation of these things. Appropriate representations may vary greatly depending on use-case requirements and services utilising the URIs specified here are free to make their own choices.
B
National Release Center Guide
The National Release Center Guide (NRC Guide) offers a practical starting point for IHTSDO Member countries. It provides guidance on NRC responsibilities and the relationships between NRCs, IHTSDO, and implementers and users within a Member country. To learn more about SNOMED CT please refer instead to the SNOMED CT Starter Guide.
A
Vendor Introduction to SNOMED CT
An informative practical introduction to SNOMED CT focused primarily on the needs of vendors and developers of EHRs and other related applications in healthcare information technology.
H
SNOMED CT Compositional Grammar Specification and Guide
Revised (May 2015) specification of the SNOMED CT Compositional Grammar used for expressions and definitions. The replaces the specification in the current edition of the Technical Implementation Guides
F
Data Analytics with SNOMED CT
This document reviews current approaches, tools and techniques for performing data analytics using SNOMED CT and to share developing practice in this area. It is anticipated that this report will benefit members, vendors and users of SNOMED CT by promoting a greater awareness of both what has been achieved, and what can be achieved by using SNOMED CT to enhance analytics services.

Additional documents related to tools or toolkits provided to support the release of SNOMED CT.

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B
SNOMED CT Lexical Resources
This resource file contains two unmaintained lexical resource files and a document that provides the file specifications and notes on use to support searching. One of these files is the ExcludedWords file that contains a list of English language stop-words that it may be helpful to exclude from searches. The other is the WordEquivalents file that can be used to extend searches to include alternative words with similar meanings.
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C
SNOMED CT Diagramming Guideline Templates
A resource file containing templates to support use of the diagramming guidelines (see SNOMED CT Diagramming Guideline on Release Documents tab of the Document Library).
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These documents are drafts that have not yet been endorsed by IHTSDO but which are part of activities which may eventually result in formal approval of all or part of the material.

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Expression Constraint Language Specification and Guide
This draft document defines and describes a formal language for representing SNOMED CT Expression Constraints. It presents the use cases, requirements, logical model, normative syntax, a set of example expression constraints and a summary of implementation considerations.
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B
Search and Data Entry Guide
The first part of this guide is concerned with searching the content of SNOMED CT to find concepts that represent particular clinical ideas. The second part of the guide is concerned with ways to use SNOMED CT to support entry of relevant clinical information in electronic health records.
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Various informal materials drafted by the the IHTSDO community of practice. These materials have not been endorsed by IHTSDO but may be of interest and value to some IHTSDO Member, implementers and users.

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B
Use Cases
A collection of draft use cases for use of SNOMED CT developed between 2010 and 2012 by members of the Implementation and Innovation Committee
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Mapping to SNOMED CT
The purpose of this draft document is to provide a high level overview of the issues which should be considered prior to embarking on such an activity, and which will result in the creation of a mapping table, details of how the process of map creation should be managed and how the resulting maps should be used.
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A
SNOMED CT Benefits
An information sheet outline some of the benefits of SNOMED CT.
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B
Supporting Meaningful Use
The Office of the National Coordinator for Health Information Technology (ONC) and CMS have adopted SNOMED CT as one of the key vocabularies for Meaningful Use Stage 2, EHR certification, and health information exchange. SNOMED CT has been specified in the federal regulations published in September 2012 (see Federal Register Vol. 77, No. 171), in which it is recommended for documenting patient problems, encounter diagnosis, procedures, family health history, and smoking status.
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B
Cooperation with other Standards Organizations
SNOMED CT is recognized as the leading global clinical terminology. Its broad scope of coverage and rich semantic foundation support meaning-based retrieval of clinical information. SNOMED CT is only one part of the solution to the challenges of making effective use of clinical information. Therefore, IHTSDO cooperates with many organizations to optimize practical benefits and minimize duplication of effort.
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