CPC ontology in .owl or .obo format

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CPC ontology in .owl or .obo format

Post by mariana » Fri Feb 05, 2021 1:40 pm


Does EPO or any of the users in this forum know of a version of the CPC ontology in .obo or .owl?

The current version in XML cannot be interpreted by the ontology editor protege.
I would be interested to hear from those working with CPC in protege.

Looking forwards to your response,


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Re: CPC ontology in .owl or .obo format

Post by mkracker » Mon Feb 08, 2021 8:55 am

Hi Mariana,

I am neither much familiar with OWL nor am I using protégé. Still, my 2 cents:

To my knowledge, the only available data set containing the CPC patent classification in Linked Data format is in EPO's "EP linked open data" (product page: https://www.epo.org/linked-data . It has been modelled with RDFS but now OWL, however you are free to add to it.

A detailed specification of the data set is under the tab "Further Information" at the link mentioned above.
Info about CPC in general is on the CPC site https://www.cooperativepatentclassification.org/index.

CPC is available as RDF in N-Triple format, downloadable from https://data.epo.org/linked-data/download/. Protégé can load N-Triples.

I hope this helps. It would be interesting to hear about your project or business case.

Martin Kracker / EPO

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Re: CPC ontology in .owl or .obo format

Post by alihanima » Fri May 06, 2022 2:31 am

The ontology editor protege cannot understand the current XML version.
I'd like to hear from folks who are working with CPC in protege.io games

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Re: CPC ontology in .owl or .obo format

Post by EPO / EPAL Team » Tue May 10, 2022 4:57 pm

Dear alihanima,

In our previous post we recommended to use the RDF we produce for CPC.

Did you make a test with this RDF?

Best regards,

User support

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Re: CPC ontology in .owl or .obo format

Post by kennaanna » Wed Dec 27, 2023 2:39 am

Dear Mariana,

I understand your frustration with the current version of the CPC ontology in XML and its compatibility with Protege. Unfortunately, I do not have access to a version of the CPC ontology in .obo or .owl format at the moment. However, I hope that someone in the EPO community or this forum can provide the assistance you need. Working with CPC in Protege can be challenging, but I believe that a solution will be found.

Best regards,
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