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NCBO hosts a repository of biomedical ontologies. These ontologies are stored in formats that are not understood by i2b2. A tool has been developed to not only extract these ontologies via bioportal REST services, but to transform them into a format that is understood by the i2b2 ONT cell.
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Tutorials
i2b2 Ontology Tutorial.pdf - Follow along for a step by step example of how metadata trees are created and configured
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