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Gloss
tSNOMED CT
is designed to allow the
Gloss
tInternational Edition
to be enhanced by adding
Gloss
tExtensions
that meet national or local requirements.
Gloss
tExtensions
are managed by
Gloss
tMembers
or
Gloss
tAffiliates
who have been issued with a
Gloss
tNamespace Identifier
, which distinguishes the
Gloss
tIdentifiers
of the
Gloss
tComponents
they maintain. An
Gloss
tExtension
may contain
Gloss
tComponents
of various types (e.g.
Gloss
tConcepts
,
Gloss
tDescriptions
,
Gloss
tRelationships
, and
Gloss
tDerivatives
including
Gloss
tReference Sets
used for a variety of purposes).

Related Links

  • DOCESG
  • Gloss
    tSNOMED CT Extension

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Gloss
tSNOMED CT
is a detailed clinical terminology which covers a broad scope. However, some groups of users will need additional
Gloss
tConcepts
,
Gloss
tDescriptions
or
Gloss
tReference Sets
to support national, local or organizational needs.

This section explains the structures that enable

Gloss
tMembers
(
Gloss
tNational Release Centers
) and
Gloss
tSNOMED International Affiliates
to add
Gloss
tConcepts
,
Gloss
tDescriptions
,
Gloss
tRelationships
and
Gloss
tReference Sets
to
Gloss
tcomplement
the
Gloss
tSNOMED CT International Release
.

The

Gloss
tExtension
mechanism allows
Gloss
tSNOMED CT
to be adapted to address the terminology needs of a country or organization which are not met by the
Gloss
tInternational Release
. The mechanism provides a structure within which the components of each
Gloss
tExtension
are uniquely identified and attributed to a specific issuing organization. This ensures that, when instance data containing content from different
Gloss
tExtensions
if communicated, the provenance of each referenced
Gloss
tConcepts
is clear and ambiguity is avoided. Since the
Gloss
tInternational Release
and all
Gloss
tExtensions
share the same common structure, the same application software can be used to enter, store and process information from different extensions. Similarly,
Gloss
tReference Sets
can be constructed that refer to content from the
Gloss
tInternational Release
and a variety of
Gloss
tExtensions
.

The common structure also means that, content developed by one organization can where relevant be easily submitted for possible inclusion in a

Gloss
tNational Edition
or in the
Gloss
tInternational Edition
.

Using the

Gloss
textension
structure can also help organizations transfer responsibility for terminology to the
Gloss
tSNOMED International
or to another organization, subject to the
Specref
RefTypefield
tterm
of the Affiliate License.
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  • Local content requirements that are likely to have wider applicability should be submitted to a
    Gloss
    tNational Release Center
    for consideration.
  • National requirements likely to have International value should be submitted to the
    Gloss
    tSNOMED International
    so they can be considered for inclusion in the
    Gloss
    tInternational Edition
    .