Timothy Mcsweeney wrote on 29/07/2020 15:04: > I mean, it just does not get any clearer than that! Luckily it gets much clearer! The ABNF syntax is specified in section 3: > The generic URI syntax consists of a hierarchical sequence of > components referred to as the scheme, authority, path, query, and > fragment. > > URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ] Where "scheme" is defined in section 3.1 as: > scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) I.e. the scheme name is followed by ":". The ABNF syntax is completely unambiguous on this point and there's no scope to argue that the scheme name should be followed by a "#" token. Did you try resubmitting the I-D with "drop:" instead of "drop#"? Nick