Re: [protege-user] hello

just trying to figure out how to use existing vocabularies like schema.org
in my ontology. my thought was first to create a class "myCourse" into my
ontology and then say that its type schema.org/Course but think i got it
now when creating individual "Mathematics" i want to be type
schema.org/Course no type myCourse which is type schema.org/Course thanks
for help

Στις Παρ 24 Ιαν 2025 στις 9:46 π.μ., ο/η Michael DeBellis <
[email protected]> έγραψε:

> about the schema/Course how we should declare it i am bit confused in your
>> file you made it like
>> @prefix : <
>> http://www.semanticweb.org/mdebe/ontologies/2025/0/us_geography#> .
>> @prefix scem: <http://www.schema.org/> .
>> scem:Course rdf:type owl:Class .
>
>
> shouldnt we just say
>> :Course rdf:type owl:Class, scem:Course
>
>
> I'm not sure why you think it should be:
>
> :Course rdf:type owl:Class, scem:Course
>
>
> "scem:Course rdf:type owl:Class" is a valid triple but ":Course rdf:type
> owl:Class, scem:Course" is not unless you are trying to say that Course has
> type Course. You can have multiple values for the object of a triple
> separated by a comma. E.g., from that US geography simple ontology you
> could say: :USA :contains :California, :Arizona. But I don't think it makes
> sense to make an instance be an instance of itself. Also, I don't
> understand why you use :Course the first time and scem:Course the second
> time. FYI, when people use just the colon there is still a prefix, it is
> just the empty string. That's what Protege does for the namespace of your
> ontology creates a mapping to the empty string prefix so you can just do
> :Course (although Protege is smart enough that you don't even need the
> ":"). But since I was inserting the IRI for the Course concept from
> schema.org into an existing ontology (which is what I thought you were
> trying to do) I couldn't use the empty string prefix because that would map
> to my ontology iri and be:
> http://www.semanticweb.org/mdebe/ontologies/2025/0/us_geography#Course
> rather than http://www.schema.org/Course which is what I thought you
> wanted. Hope this is making sense, it's late and has been a long day.
> Anyway, let me know what you think and we'll figure it out.
>
> Michael
>
>
>
>
> On Thu, Jan 23, 2025 at 8:07 PM stathoula terzidou <[email protected]>
> wrote:
>
>> about the schema/Course how we should declare it i am bit confused in
>> your file you made it like
>> @prefix : <
>> http://www.semanticweb.org/mdebe/ontologies/2025/0/us_geography#> .
>> @prefix scem: <http://www.schema.org/> .
>> scem:Course rdf:type owl:Class .
>>
>> shouldnt we just say
>> :Course rdf:type owl:Class, scem:Course
>>
>> Στις Παρ 24 Ιαν 2025 στις 5:53 π.μ., ο/η Michael DeBellis <
>> [email protected]> έγραψε:
>>
>>> Thanks, that makes sense.  I think your best bet (unless someone else on
>>> the list has ideas) is to create an issue on their GitHub repo:
>>> https://github.com/fekaputra/shacl-plugin  I'm also copying Andre who I
>>> think is one of the main developers. Andre, please see thread below:
>>>
>>> On Thu, Jan 23, 2025 at 7:47 PM stathoula terzidou <[email protected]>
>>> wrote:
>>>
>>>> just checked its from the shacl4protege plugin window>views>ontology
>>>> views>turtle rendering
>>>> when i open it it removes all the prefixes i created and also the empty
>>>> one ' : '
>>>>
>>>> Στις Παρ 24 Ιαν 2025 στις 4:05 π.μ., ο/η Michael DeBellis <
>>>> [email protected]> έγραψε:
>>>>
>>>>> Just realized I didn't answer your second question:
>>>>>
>>>>> also in the turtle rendering tab why it shows me the full IRIs from
>>>>>> all entities and not with the prefix?
>>>>>
>>>>>
>>>>> Not sure what you mean by the "turtle rendering tab". I don't see that
>>>>> tab in the tabs under Window>Tabs   Do you mean just the ttl file that gets
>>>>> generated when you save the ontology in Turtle format? I just checked and
>>>>> it does indeed use the full IRIs. Not sure why. My guess is it may be a bit
>>>>> more efficient and since most people seldom edit those ttl files directly
>>>>> having the full IRIs doesn't really matter. The only time (unless you are
>>>>> one of those developers who still thinks "real programmers use vi") you
>>>>> should directly edit those files is when you have some unexplained behavior
>>>>> because some weird character or something krept into your file.
>>>>>
>>>>> If you have a Turtle Rendering Tab in Protege my guess is you are
>>>>> using some plugin that I'm not aware of that creates such a tab. If that's
>>>>> the case please let us know.
>>>>>
>>>>> Michael
>>>>>
>>>>> On Thu, Jan 23, 2025 at 6:14 AM stathoula terzidou <
>>>>> [email protected]> wrote:
>>>>>
>>>>>> i try to add a prefix from the 'Ontology Prefixes' tab and clicking
>>>>>> the + button. At first seems to create it but when switching tabs it
>>>>>> disappears
>>>>>> i have a class Course and want to use the schema.org/Course so i was
>>>>>> thinking to create a prefix sch: <http://www.schema.org/> and make
>>>>>> the class Course a owl:Class, sch:Course .
>>>>>> is this correct?
>>>>>> also in the turtle rendering tab why it shows me the full IRIs from
>>>>>> all entities and not with the prefix?
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