Terminology servers
should provide efficient access to the
Identifiers
that represent
concepts
with structurally significant
Roles
within the terminology. lists the
concepts
that have the most clear-cut structurally significant
Roles
. A
terminology server
should enable access to these
Identifiers
by an easy to use name of enumeration. In addition a
terminology server
should provide a service that rapidly determines whether a given
concept
is a
subtype
of any of these
concepts
. It is also useful to for the
terminology server
to extend similar functionality to all direct
subtypes
of the
root concept
(
138875005|SNOMED CT Concept|
) and to
subtype descendants
of
410662002|concept model attribute|
.

Table 30. Essential concept Identifiers

 

 

Id

Preferred Term

Significance

138875005|SNOMED CT Concept (SNOMED RT+CTV3)|

138875005|SNOMED CT Concept|

The

root concept
. All other
active concepts
are
subtypes
of this
concept
.

900000000000441003|SNOMED CT Model Component (metadata)|

900000000000441003|SNOMED CT Model Component|

All active metadata

concepts
are
subtypes
of this
concept
.

900000000000442005|Core metadata concept (core metadata concept)|

900000000000442005|core metadata concept|

All enumerated values applicable to core

components
are
subtypes
of this
concept
.

900000000000454005|Foundation metadata concept (foundation metadata concept)|

900000000000454005|foundation metadata concept|

All

reference sets
and all
reference set
related metadata
concept
are
subtypes
of this
concept
.

900000000000455006|Reference set (foundation metadata concept)|

900000000000455006|reference set|

All

reference sets
are
subtypes
of this
concept
.

116680003|Is a (attribute)|

116680003|is a|

The

Attribute
used to specify the
subtype
Relationship
between
concepts
.

246061005|Attribute (attribute)|

246061005|attribute|

All

Attribute
(
relationship type
)
concepts
are
subtypes
of this
concept
.

410662002|Concept model attribute (attribute)|

410662002|concept model attribute|

With the exception of the

subtype
Relationship
(see above) all
relationship types
that are used in the
SNOMED CT Concept Model
are
subtypes
of this
concept
.

370136006|Namespace concept (namespace concept)|

370136006|namespace concept|

Each

subtype
of this
concept
represents an extension namespaces allocated by the
IHTSDO
.

363743006|Navigational concept (navigational concept)|

363743006|navigational concept|

Subtypes
of this
concept
to provide nodes in
navigation hierarchies
. They act as grouper categories that do not have any semantic meaning and thus do not appear elsewhere in the
SNOMED CT
hierarchy.