$rfc1738:scheme-char
[+\u002D-.0-9a-z]
[+\x2D-.0-9a-z]
The set definition is contained in sets.json
data file.
U+002B
U+002D
U+002E
U+0030
U+0031
U+0032
U+0033
U+0034
U+0035
U+0036
U+0037
U+0038
U+0039
U+0061
U+0062
U+0063
U+0064
U+0065
U+0066
U+0067
U+0068
U+0069
U+006A
U+006B
U+006C
U+006D
U+006E
U+006F
U+0070
U+0071
U+0072
U+0073
U+0074
U+0075
U+0076
U+0077
U+0078
U+0079
U+007A