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Browse Content Changes for the July 2020 Release

The daily build is available to review changes made to content for the July 2020 release https://dailybuild.ihtsdotools.org/

Forthcoming concept inactivations, new concepts and changes to existing concepts can be reviewed using the tab 'Daily build.'

2019 novel coronavirus

A set of new concepts have been added for the JANUARY 2020 release:

840539006|Disease caused by 2019 novel coronavirus (disorder)| 

840534001|2019 novel coronavirus vaccination (procedure)| 

840544004|Suspected disease caused by 2019 novel coronavirus (situation)|

840536004|Antigen of 2019 novel coronavirus (substance)| 

840535000|Antibody to 2019 novel coronavirus (substance)| 

840533007|2019 novel coronavirus (organism)| 

840546002|Exposure to 2019 novel coronavirus (event)| 

These concepts all have an additional synonym of 'Wuhan coronavirus' to aid searchability.

Implementation of the new anatomy concept model

The completion of the revision of hierarchical relationships provides stable anatomy content and improves the quality of classification results in other hierarchies.

Over forthcoming releasesFor the next stage of the anatomy update, the plan is to implement the new anatomy concept model and release the changes in January 2021. There are almost 35,000 anatomy concepts and they will be modeled by different types of 'part of' relationships. The new model will enable us to automatically generate hierarchies to further improve quality and consistency. 

Information about the work completed in previous release for revision of IS_A relationships can be viewed here: https://confluence.ihtsdotools.org/display/IAP/Revision+of+IS-A+relationships+for+anatomy

July 2020 International Release and future releases

Revision of the cell hierarchy

Descendants Over forthcoming releases, descendants of 4421005 |Cell structure (cell structure)| will be updated according to the SEP model.

SEP description patterns will be applied to the existing content. Descendants of 362837007 |Entire cell (cell)| will be updated to include the word ‘entire’ in all descriptions.

The semantic tag ‘(cell)’ will be changed to ‘(cell structure)’. Descriptions for the rest of the concepts will be updated to include the word ‘structure’. 

This modeling improvement will address the missing relationship between structure and entire concepts. 

July 2020 International Release and future release.

MRCM Changes

Please see:

MRCM changes for the July 2020 release

Quality Initiative

Information about the project can found here - Quality Initiative - Progress

Note: There are changes to the Service Level Agreement for the CRS as a result of the Quality Initiative:

https://www.snomed.org/SNOMED/media/SNOMED/documents/Early-Visibility-of-Changes-to-Service-Level-Agreement-International-Content-Request-Service-(CRS).pdf

Content Improvements in the Substance and Product Hierarchies

Please see briefing notes here Drugs Project

Please contact info@snomed.org with any inquiries.

Content Improvements in the Physical object Hierarchy

Please see briefing notes here https://confluence.ihtsdotools.org/display/IAP/Devices+Project

Please contact info@snomed.org with any inquiries.

WAS_A

Inactivation reason of LIMITED/WAS_A is not allowed for any new content inactivations after the July 2018 release. The WAS_A association refset has not been updated thereafter.

At the Editorial Advisory Group meeting in April 2019, agreement was reached to discontinue the maintenance of WAS_A relationships when inactivating concepts that have a historical association to an inactive concept. When changes are made to a historical relationship for a concept that was previously inactivated using WAS_A, effort will be made to assign a new historical relationship that facilitates traceability of the concept (e.g. DUPLICATE or AMBIGUOUS) as opposed to NON-CONFORMANCE TO EDITORIAL POLICY.

Existing WAS_A relationships will be inactivated in a future release once a plan for batch reassignment of historical relationships has been developed. Until then, SNOMED International will not continue to use or maintain WAS_A relationships.

Changes for 'On examination' (O/E) and 'Complaining of' (C/O) concepts

• Addition of any further required content
• Inactivation of the O/E and C/O content (Batch change) for return to the UK.

Content being inactivated will use the reason - component moved elsewhere. 

Note: some concepts will not have a replacement concept as they are groupers. For example:
On examination - sign irregular (finding)
On examination - neurological reflex (finding)

Traumatic Dislocation

Traumatic dislocation concepts are being remodeled according to the new representation using DUE TO "Traumatic event".

This work has been partially completed for the Jan 2020 release, resulting in the remaining subhierarchies moving from under "Traumatic dislocation of joint" to "Dislocation of joint". These remaining subhierarchies will be remodeled for the July 2020 release.

Replacement of the Stated Relationship files with the new OWL Axiom refset files

A set of documentations has been developed to support the Logic Profile Enhancements. 

• SNOMED DL Profile Enhancements
• SNOMED CT Logic Profile Specification
• SNOMED CT OWL Guide (OWL Refsets specification)
• Snomed OWL Toolkit - https://github.com/IHTSDO/snomed-owl-toolkit
• Classifying SNOMED CT using the Snomed OWL Toolkit - https://youtu.be/-91egY9mJqA
• Creating an OWL file containing SNOMED CT - https://youtu.be/sfFbMMioA_4

For any questions, please contact SNOMED International at support@snomed.org with “OWL Axiom refset files implementation question” in the subject line.