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Introduction to Biomedical Ontologies #3: Anatomy of an Ontology Annotation, part 2

  Rat Community Videos: Ontologies

Are you missing the added value that you could be getting from ontology annotations?  You know what ontologies are—maybe you’ve even used them on occasion.  But if the only part of an ontology annotation that you pay attention to is the term itself, you could be skipping over valuable information that the other components of annotations supply.  This video is the second of a pair of companion tutorials that will give you insight into what that “valuable information” is and how to interpret what you see when you examine ontology annotations

This video will show you:

  • What an “evidence code” is
  • What several of the evidence codes mean and when they are used
  • What “qualifiers” are and when they are used
  • What the “WITH” field is and what kind of data it contains
  • Where to find more information on evidence codes, qualifiers and the WITH field

This video is the third in a series of introductory tutorials about biomedical ontologies.  The next video in this series will demonstrate how you can use some web-based tools to leverage the power of biomedical ontologies for your own research.


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

For More Information:

To read the script of this video with links to more information, click here.

To view the RGD page with just the links to more information, click here.

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.