ГОСТthe literal text ГОСТ (case insensitive) \s*a Unicode whitespace character, repeated any number of times
\d+a Unicode decimal digit, repeated at least once
\.the literal . (4610 / 568 / 2E16)
\d+a Unicode decimal digit, repeated at least once
-the literal - (4510 / 558 / 2D16)
\d+a Unicode decimal digit, repeated at least once
g modifier: global. Finds all matches instead of stopping after the first
i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters
u modifier: unicode. Treats the pattern and subject as UTF-16