Hallo Vanja!

Thank you for your information. But I would like to note, that
the documentation of the url-tag state: "This tag is being used for very different types of content - ... or even documentation on the OSM wiki" (look https://wiki.openstreetmap.org/wiki/Key:url). That means: It is not false using url-tag.

With friendly greetings
Stadtigel from Germany