^start of line
\d{5}a Unicode decimal digit, repeated exactly 5 times
_the literal _ (9510 / 1378 / 5F16)
.+?any Unicode character (except for line terminators), repeated at least once
_the literal _ (9510 / 1378 / 5F16)
\d{4}a Unicode decimal digit, repeated exactly 4 times
-the literal - (4510 / 558 / 2D16)
_the literal _ (9510 / 1378 / 5F16)
Non-Capturing Group(?:\d{2}[-_]){2} {2}repeats the group contents below exactly 2 times:
\d{2}a Unicode decimal digit, repeated exactly 2 times
-the literal - (4510 / 558 / 2D16)
_the literal _ (9510 / 1378 / 5F16)
Non-Capturing Group(?:\d{2}[:_]){2} {2}repeats the group contents below exactly 2 times:
\d{2}a Unicode decimal digit, repeated exactly 2 times
:the literal : (5810 / 728 / 3A16)
_the literal _ (9510 / 1378 / 5F16)
\d{2}a Unicode decimal digit, repeated exactly 2 times
\.the literal . (4610 / 568 / 2E16)
datthe literal text dat (case sensitive) $end of line
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string