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[bioontology-support] Empty classes at API class request

Manuel Salvadores Olaizola manuelso at
Mon Aug 10 14:17:04 PDT 2015


This URIs reflect an anonymous class. BioPortal does not provide functionality for anonymous classes except. This class that you are looking at is a side issue with NCIT. We have an old version of NCIT for which we did not filter anonymous classes.

We are in the progress of fixing this. As a work around you can just ignore these classes.



From: bioontology-support <bioontology-support-bounces at> on behalf of Erik Fäßler <erik.faessler at>
Sent: Monday, August 10, 2015 1:24 AM
To: NCBO User Support
Subject: [bioontology-support] Empty classes at API class request

Dear BioPortal team,

When downloading all classes of NCIT, I noticed a range of classes that seem to be empty. They have an ID in the form

But no other information whatsoever. They do serve as parents to other, nonempty, classes, however. I searched for information on the web but did not have any luck. I apologize if I just missed the respective documentation page.
The IRIs do not look as being part of the actual ontology/terminology. Where do they come from and what is their meaning?

Thank you very much,

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