This document serves as a roadmap to documentation of direct interest to those developing
software applications and systems that use SNOMED CT .
- Structure and Content Guide:
- This part of the guide provides reference material on the technical design of
. These design features provide the foundation for the services described in subsequent
parts of the guide.
- The design features include:
), extensibility mechanisms (
that are used to represent information within a electronic record.
- Release File Specifications:
of the files used to distribute
content to licensees;
- The specification are an important source of technical reference for those developing
and maintaining applications that provide access to
- Editorial Guide:
- This part of the guide describes the ways in which technical design of
is populated with content. The
specifies the main hierarchies in which
are arranged and the types of the
that are permitted between them.
is directly relevant to implementation because it determines the types of clinical
ideas that can be expressed using
and the ways in which these ideas can be refined to represent more detailed information.
- Terminology Services Guide :
- This part of the guide describes the types of services required to access and make
. It also provides practical advice on effective ways to deliver these services based
on practice experience.
- These services include: importing distribution files, determining the status and properties of selected components, searching for
, navigating hierarchies, testing and using
, working with references sets to determine
acceptability, membership of
to other classification and additional
- Record Services Guide:
- This part of the guide describes the types of services required to use
, to represent instances of clinical information in
, knowledge resources, decision support algorithms and data retrieval specifications.
- These services include, entry of
), storage of
, communication and selective retrieval of information that uses
to represent clinical ideas.
- As part of the consideration of storage, communication and retrieval, this part of
the guide also discusses the integration of the terminology with a well-designed information
model. It is now widely recognized that this is crucial element in design and development
are dependent on
and these two sets of services may be tightly integrated. Alternatively, an application
may use a third party
to reduce the required development.
- Change Management Guide:
- This part of the guide addresses requirements that arise from changes to the content,
structure and use of
- The first significant change management challenge relates to
from other coding schemes or from a less structured electronic record system. Decisions
must be made about retaining or converting records, queries and protocols originally
created using a terminology other than
- Each release of
introduces some changes to content. From time to time there will also be changes
designed to increase the expressivity of the
. Occasionally there may also be additional technical artifacts or specification developed
to meet emerging requirements.
- As systems evolve and as the content and structure of
are enhanced there is a continuing requirement to address to manage changes smoothly
and without loss of information or functionality.
- Extension Services Guide:
- This part of the guide describes additional services which some advanced users or
implementers may require to allow them to create or maintain
for use in a particular country, organization or specialty.
- The most common of these requirements will be to support the creation and maintenance
. Uses for
include representation of
to indicate acceptability of
in a specific
or specialty, alternative hierarachies,
to classifications and