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The ONKI is provided as a part of the ONKI Living Lab - an open lab for testing the latest semantic web technologies in practice, with real users like you. Currently, over 10 000 people are using ONKI each month.


We hope you like the ONKI service and enjoy using it for your purposes!


If you encounter any problems or have improvement ideas, please contact the ONKI team. We are also very much interested in your success stories in using ONKI - please share your experiences!


The ONKI Team



Building the future of the Semantic Web and beyond.



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Please notice! The selection does not affect to the languages of ontologies and vocabularies.
Medical Subject Headings - MeSH
Medical Subject Headings - MeSH

MeSH is the National Library of Medicine's controlled vocabulary thesaurus. It consists of sets of terms naming descriptors in a hierarchical structure that permits searching at various levels of specificity.

Search results with the given restriction
The way property values are displayed:

The way concept relations are shown:




Ureteral Calculi