dokk

Build the database

1. Download Jena:

   wget https://downloads.apache.org/jena/binaries/apache-jena-<version>.tar.gz
   tar xzf apache-jena-<version>.tar.gz
   

Make sure apache-jena-<version>/bin/ is in your $PATH.

1. Create the database (execute from the root of the repository):

   tdbloader --loc=dokk ./**/*.ttl
   

2. The database is ready to accept queries from the command line

   tdbquery --loc=dokk "SELECT DISTINCT ?subject WHERE {?subject ?predicate ?object}"
   

More examples

Hint: if these queries are too long to be typed in the CLI, they can be saved to a file and read like this: tdbquery --loc=dokk --query=<file_name>

1. Find all the keyboards that pass the double-shift nkro test:

   PREFIX : <dokk:nkro_test/>
   SELECT DISTINCT ?keeb
   WHERE {
       ?keeb :test [
           :result "THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG"
       ]
   }
   

2. Is there any membrane keyboard that pass the double-shift test?

   PREFIX : <dokk:nkro_test/>
   ASK {
       ?keeb a :Keyboard;
             :type "membrane";
             :test [
                 :result "THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG"
             ]
   }
   

3. Shame membrane keebs:

   PREFIX : <dokk:nkro_test/>
   SELECT ?keeb ?type ?result {
       ?keeb a :Keyboard;
             :type ?type;
             :test [ :result ?result ] .
       FILTER(?result != "THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG")
   }
   

4. List all Mimi&Eunice comics:

   PREFIX : <dokk:mimi_and_eunice/>
   SELECT ?n ?t
   WHERE {
       ?cs a :ComicStrip;
           :number ?n;
           :title ?t
   }
   ORDER BY ?n