The table below lists some examples of namespace identifiers and the organizations to which they are allocated. These organizations include
|t||National Release Centers|
(or NRCs), local organizations, and commercial vendors. Note that this table is an excerpt from the SNOMED CT Namespace Registry
as of October, 2017.
| Caption label|
Examples of namespace identifiers
|1000124||National Library of Medicine (USA) – IHTSDO Member|
Canada Health Infoway (Canada) – IHTSDO Member
|1000052||National Board of Health and Welfare (Sweden) – IHTSDO Member|
|1000129||B2i International LLC|
| Caption reference|
illustrates the structure of an extension SCTID using the concept
|t||5281000124103 |Persistent asthma||
from the 20170301 US Edition of SNOMED CT. The structure of the SCTID has been labeled and the namespace identifier is shown in red. Note that the spaces do not form part of the SCTID and have been added to improve readability.
| Caption label|
The structure of an example extension SCTID
The namespace identifier used in an extension's SCTIDs should NOT be used as the mechanism to determine which edition or extension a component belongs to. Instead, the moduleId attribute is used for this purpose. For more information, see 4.2 Modules.
For example, although
includes the namespace identifier "1000087" (allocated to Canada Health Infoway) and the partition identifier "10", this concept belongs to the
|t||6811000087108 |CT guided biopsy of left lower limb||
in the International Edition. The presence of the Canadian namespace identifier in this SCTID indicates that this concept was originally created by Canada Health Infoway and later promoted into the International Edition. For further information on content promotion, please refer to 220.127.116.11 Updating Extension.
|t||900000000000207008 |SNOMED CT core module||