Re: [protege-user] Bottom Object and Data properties? [SEC=OFFICIAL]
"O'Dea, Damian MR via protege-user" <[email protected]>
| Newsgroups | gmane.comp.misc.ontology.protege.owl |
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OFFICIAL Thanks for the informative response, Jim. I just tried this out of curiosity, and because you specifically mentioned HermiT, I tried with Pellet as well and the equivalence wasn’t inferred. Just an FYI. Damian Mr Damian O’Dea (he/him) Multi-Domain Fusion | Automated Fusion | Intelligence Analysis Information Sciences Division Defence Science and Technology Group _____________________________________________________________________________ Department of Defence | Edinburgh | L0205 2.C.29 13/205 Maritime Ave | DSTG | EDINBURGH SA 5111 P: +61883934751 | M: 0407 6111 32 | www.defence.gov.au<http://www.defence.gov.au/> E: [email protected]<mailto:[email protected]> Defence acknowledges the Traditional Custodians of the Country throughout Australia. We recognise their continuing connection to land, waters and community. We pay our respects to them, their culture and to their Elders past and present. IMPORTANT: This email remains the property of the Department of Defence. Unauthorised communication and dealing with the information in the email may be a serious criminal offence. If you have received this email in error, you are requested to contact the sender and delete the email immediately. From: protege-user <[email protected]> On Behalf Of Michael DeBellis Sent: Tuesday, 18 November 2025 1:46 PM To: User support for WebProtege and Protege Desktop <[email protected]> Subject: Re: [protege-user] Bottom Object and Data properties? ⚠ EXTERNAL EMAIL: Do not click any links or open any attachments unless you trust the sender and know the content is safe. ⚠. Thanks! On Mon, Nov 17, 2025 at 6:32 PM Balhoff, Jim via protege-user <[email protected]<mailto:[email protected]>> wrote: Yes, they are both in here: https://www.w3.org/TR/owl2-direct-semantics/ Try asserting a range of owl:Nothing for an object property, and if you run HermiT in Protégé you will see that property is equivalent to owl:bottomObjectProperty. On Nov 17, 2025, at 8:41 PM, Michael DeBellis <[email protected]<mailto:[email protected]>> wrote: I've been writing up some extended documentation for OWL and Protege. ChatGPT just told me something I want to double check. I was working on some basic SPARQL queries to do manipulations like add labels to classes and properties and I wondered: is there an equivalent "bottom" for object and data properties that is analogous to owl:Nothing for classes? ChatGPT says that there is but that most tools (and I think Protege is like this) don't bother to show it the way they show owl:Nothing. Just wanted to verify that this is correct and that owl:bottomObjectProperty and owl:bottomDataProperty exist but aren't shown in Protege. (I think there is no equivalent for Annotation Properties because there is no need, the only reason you need those is for reasoning and annotation props aren't seen by the reasoner). Michael https://www.michaeldebellis.com/blog _______________________________________________ protege-user mailing list [email protected]<mailto:[email protected]> https://mailman.stanford.edu/mailman/listinfo/protege-user _______________________________________________ protege-user mailing list [email protected]<mailto:[email protected]> https://mailman.stanford.edu/mailman/listinfo/protege-user _______________________________________________ protege-user mailing list [email protected] https://mailman.stanford.edu/mailman/listinfo/protege-user