chore: add dataset type to RDF as URI when possible

[NilsOveTen]

resolve #145

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.39%. Comparing base (f628190) to head (c28c011).

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #193      +/-   ##
============================================
+ Coverage     78.31%   78.39%   +0.07%     
  Complexity      271      271              
============================================
  Files            29       29              
  Lines          1116     1120       +4     
  Branches        260      261       +1     
============================================
+ Hits            874      878       +4     
  Misses           90       90              
  Partials        152      152              

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