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Current Version - Under Revision

The International Release files to be imported should all be selected from the set of files representing a single Release Type for a chosen version of the SNOMED CT International Release .

Within the chosen file set the files identified in must be imported. The files listed in should also be imported as these provide important information about inactive concepts and metadata about Description types. The decision on whether to import the files listed in depends on whether the additional features identified in that table are required for the planned implementation. Finally the supplementary files listed in may be used to assist implementation but are not essential as the data they contain can be generated from the other files and/or replaced by alternative approaches to provide similar functionality.

Table 7. Mandatory import files

 

 

 

File type

Content

Notes

sct2_concept_ [rt] _INT...

concepts

The primary components of SNOMED CT . Essential for all implementations.

sct2_description_ [rt] _INT...

Descriptions

 

sct2_relationship_ [rt] _INT...

Relationships

 

sct2_cRefset_Language [rt] - [lang] _INT...

Language Refset (s)

At least one Language Refset must be imported. The English Language refset should be imported unless another Language refset covering the full content is available and imported.

Table 8. Highly recommended import files

 

 

 

File type

Content

Notes

der2_cRefset_AttributeValue [rt] _...

concept Inactivation refset

Provides information about the status of inactive concepts .

 

Description Inactivation Refset

Provides information about the status of inactive descriptions .

der2_cRefset_DescriptionType [rt] _INT...

 

 

der2_cRefset_AssociationReference [rt] _INT...

 

 

Table 9. Optional import files

 

 

 

File type

Content

Notes

der2_sRefset_SimpleMap [rt] _INT...

Maps from NHS Clinical Terms Version 3 codes, other Read Codes to SNOMED CT

Only required if the server needs to be able to lookup SNOMED CT concepts based on a CTV3 Identifier or Read Code .

 

Maps from legacy SNOMED CT 3 codes to SNOMED CT

Only required if the server needs to be able to lookup SNOMED CT concepts based on a legacy SNOMED CT 3 code.

WordEquivalents

 

 

StatedRelationships

 

 

Table 10. Supplementary import files

 

 

 

File type

Content

Notes

DescWordKey

 

 

DescDualKey

 

 

ExcludedWords

 

 

TransitiveClosure

 

Generated from the Relationships . Needs to be regenerated or updated if Extensions are imported.

If Extensions are required to support an implementation, the release files to be imported should be selected from the set of files for a single Release Type for a chosen version of that Extension . It is important to ensure that the International Release version(s) on which all the imported Extensions are based has also been imported. The files that need to be imported from a chosen Extension may vary depending on the scope of the Extension .

Note: Advice should be sought from the Extension provider on the essential and recommended requirements of files to be imported and supported.


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