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[bioontology-support] Empty classes at API class request

Erik Fäßler erik.faessler at
Mon Aug 10 23:14:54 PDT 2015

Hi Manuel,

I thought something like that. Thank you very much, very helpful!



> On 10 Aug 2015, at 23:17, Manuel Salvadores Olaizola <manuelso at> wrote:
> Erik,
> 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.
> Best,
> Manuel
> 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,
> Erik

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