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Introduction to Biomedical Ontologies #2: Anatomy of an Ontology Annotation, part 1

  Rat Community Videos: Ontologies

Even if you know something about biomedical ontologies, you might have wondered where the ontology “annotations”–that is, the assignments of specific ontology terms to genes, proteins, QTLs, animal strains, etc–come from.  How are terms assigned to data objects?  What are the assignments based on?  And is there a way to tell just by looking at an annotation what kind of evidence it’s based on?  This video is the first of a pair of companion tutorials that answer these questions.

This video will show you:

  • what an ontology annotation is
  • why it’s helpful to researchers that ontology terms are assigned to genes, gene products and other data objects
  • how to tell the difference between an annotation that’s based on experimental evidence and one that isn’t
  • what an “evidence code” is
  • how annotations can be assigned to genes or other data objects on which no research has been done

This video is the second in a series of introductory tutorials about biomedical ontologies.  For a more detailed look at ontology annotations and the information they contain, stay tuned for the next installment:  Anatomy of an Ontology Annotation, part 2.


Click here to go back to the Introduction to Biomedical Ontologies Video Series page.

This work was supported in part by a Driving Biological Project Grant from the National Center for Biomedical Ontology (NCBO).

For more information about NCBOclick here.  To explore any of the more than 200 biomedical ontologies found in the NCBO BioPortal toolclick here.


RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.