Init PKG vocabulary/ontology. #29
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| @prefix pkg: <http://example.org/pkg/> . | |||
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Is it standard to use http://example.org/? Or can we use something for tailored for our application.
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example.org|com|net is standard to use for examples, as this address is reserved for such things.
We should make an IRI where we can publish the vocabulary file. I have 2 suggestions:
- iai's webpage, e.g., https://iai.group/vocabulary/pkg
- use github's webpages feature for this project
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Ok thanks for clearing this up.
| @prefix xsd: <http://www.w3.org/2001/XMLSchema#> . | ||
| @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . | ||
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| <> rdf:type owl:Ontology . |
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Just a clarification question, why use <> instead of pkg here?
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<> means "this", so it says that "this file is an ontology". Once we have settled on an IRI where we can publish the vocabulary we should set this to something fixed.
| pkg:Preference rdf:type owl:Class . | ||
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| pkg:preference rdf:type owl:ObjectProperty ; | ||
| rdfs:domain owl:Thing ; |
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Why does the preference property belong to the class Thing? Is it because if a predicate in triple is preference then subject is a person and person is an instance of Thing?
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if a predicate in triple is preference then subject is a person and person is an instance of Thing
No, just:
if a predicate in triple is preference then subject is an instance of Thing
Think of owl:Thing as not a thing in the natural language sense, but as "anything". An option would be to remove the statement "pkg:preference rdfs:domain owl:Thing " as it is really not a restriction. The purpose of the statement is to say that anything can have a preference.
If it is the case that only persons can state a preference, then we can decide to state that.
Fixes #23