The Dutch Libraries have the Verschuere dictionary at their disposal, which contains approximately 200,000 terms and explanations.
The RNA project links keywords and matching words in the description of other keywords. In this way a network of lemmas is created, a reference structure that was already implicitly present in the descriptions. This lemma network is largely created in an automated way.
In this way, users can jump from keyword to keyword and from each keyword to the associated description.