let relative_RE_raw = "(^[^/]+(/[^/]+)*/?$)"
let relative_RE = Pcre.regexp relative_RE_raw
let file_scheme_RE_raw = "(^file://)"
let relative_RE_raw = "(^[^/]+(/[^/]+)*/?$)"
let relative_RE = Pcre.regexp relative_RE_raw
let file_scheme_RE_raw = "(^file://)"