A descriptive delta for identifying changes in SNOMED CT

Christopher Ochs, Yehoshua Perl, Gai Elhanan, James T. Case

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


SNOMED CT is a large and complex medical terminology. Thousands of editing operations are applied to its content for each new release. Understanding what changed in a release is important for the end user and SNOMED CT editors. Each SNOMED CT release comes with release notes that provide a brief description of the changes that occurred and a set of "delta" files that identify individual changes in the content. The release notes are brief and changes to thousands of concepts may be described in a few sentences, whereas the delta files contain tens of thousands of individual changes. To better identify how SNOMED CT content changes between releases we introduce a methodology of creating a descriptive delta that captures the editing operations that were applied to SNOMED CT content in a given release in a more comprehensible form. We use this methodology to analyze editing operations that were part of a recent remodeling effort of the Congenital disease and Infectious disease subhierarchies in the large Clinical finding hierarchy.

Original languageEnglish (US)
JournalCEUR Workshop Proceedings
StatePublished - 2016
Event2016 Joint International Conference on Biological Ontology and BioCreative - Food, Nutrition, Health and Environment for the 9 Billion, ICBO-BioCreative 2016 - Corvallis, United States
Duration: Aug 1 2016Aug 4 2016

All Science Journal Classification (ASJC) codes

  • General Computer Science


  • Remodeling tracking
  • Terminology change analysis
  • Terminology change tracking


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