okay - set uses POST - but why then is there the url part ````settattribute````?

From my understanding of REST the call should look like this:

GET oc/core/ocs/v1.php/privatedata/testy/123 
POST oc/core/ocs/v1.php/privatedata/testy/123 
DELETE oc/core/ocs/v1.php/privatedata/testy/123