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Glossary ref
SNOMED CT identifiers
are unique integer
Glossary ref
Identifiers
which include embedded information about the type and origin of the
Glossary ref
components
they identify. One part of this embedded information is the
Glossary ref
namespace-identifier
which identifies the
Glossary ref
Extension
in which the
Glossary ref
component
originated.

Prior to the change described by this note the

Glossary ref
namespace-identifier
also determined the organization responsible for maintaining the
Glossary ref
component
. As a consequence, the specifications required that whenever responsibility for maintenance of
Glossary ref
component
was transferred this required it to be inactivated and replaced by a new
Glossary ref
component
with a new
Glossary ref
SCTID
with a
Glossary ref
partition identifier
and namespace-
Glossary ref
Identifier
appropriated to the new maintenance arrangement.

The

Glossary ref
Identifier
change resulting from moving a
Glossary ref
component
from an
Glossary ref
Extension
to the
Glossary ref
International Release
causes disruption in the authoring environment. From an implementation perspective several
Glossary ref
SNOMED CT identifiers
changed from one release to the next, without any change in intended meaning, as a result of adoption of
Glossary ref
concept
from an
Glossary ref
Extension
as part of the
Glossary ref
International Release
. These changes had a negative impact on system operation and interoperability between systems.