nemo-ufes / gufo

gUFO: A Lightweight Implementation of the Unified Foundational Ontology (UFO)
http://purl.org/nemo/doc/gufo
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TemporaryRelationshipSituation vs MaterialRelationshipType #25

Open ManuelSimoes opened 2 months ago

ManuelSimoes commented 2 months ago

In the gUFO documentation it says to prefer Relator to TemporaryRelationshipSituation in case of a MaterialRelationshipType. However most of the examples given of the TemporaryRelationshipSituation concern MaterialRelationshipTypes ("the situation in which Einstein works at the Swiss Patent Office in Bern; the situation in which Elon Musk studies at the University of Pennsylvania; the situation in which John Lennon is married to Yoko Ono" ). Could someone clarify?

jpalmeida commented 2 months ago

Relators can change qualitatively in time, and that is not the case with situations. And relators can be decomposed into extrinsic modes (which can also change qualitatively in time) whenever the application requires. For example, you could have a breakdown of the duties of Einstein and the rights of the Swiss Patent Office in Bern in the scope of Einstein's Employment Relator. So, that's why Relators will be preferred most of the time when reifying a material relationship. I think we can improve the documentation of TemporaryRelationshipSituation by including examples of comparative relationships.