Docker and docker.local

Expected behavior

Access to running containers with Kitematic or browser - http://docker.local:… is working the same way like http://docker:…

Actual behavior

Access to http://docker:… is working, access to http://docker.local is not working from browser (but ping docker.local in command-shell is working). The error is (in german) “Konnte keine IP Adresse vom Hostnamen docker.local ermitteln.”

Is docker.local an official address or is docker the new and only official address?