Rather than using via the clojure CLI tools it is also possible to AOT compile the RDF Validator as an uberjar, and run with the incantation: java -jar rdf-validator.jar.
This has the small advantage that it reduces start up time a little, however it does also make it substantially harder to assemble dependencies via the command line tools hence this mechanism is no longer recommended.
To compile an uberjar though, you need to first install leiningen and then run:
lein uberjar
This will build a standalone jar in the target/uberjar directory.