There isn't a class Teacher in the file - there is a string "Teacher" in a couple of places.

Try writing the file out in a format that is easier to look at:

Command line:

riot --pretty Turtle Notebook.rdf

To query for all classes:

sparql --data ~/Desktop/Notebook.rdf 'SELECT DISTINCT ?T { ?x a ?T }'

    Andy

On 27/04/2021 11:55, emri mbiemri wrote:
Dears,

I am trying to query a specific RDF file.  I  need this solution for my studies.

The file I have to work with is:
https://github.com/iliriani/Test/blob/main/Notebook.rdf

I am trying to get somehow all the attributes of a given class within this 
model. But cannot find the right query!

For instance, I want to get all attributes of class "Teacher", it should return 
me:
- id
- Emri
- Mbiemri
- Lendet
- Evaluations
- User

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