
Spelling of ä, ö, ü, ß in URLs
Since URLs normally cannot contain non-ASCII characters, companies with names such as Fränk, Ölfarbe, and Spülwelt would have URLs like fraenk.de, oelfarbe.de, and spuelwelt.de
However, a couple of days ago, I saw a sign for a company with a name like Weißenwalder with a web site name of weiszenwalder.de
This is the first time I have seen ß changed to the s-z version (un-ligatured?) rather than a double s, which is what I expected. Is this normally the case?