Non-Capturing Group(?:^|\n) \na line-feed (newline) character (ASCII 10)
Group 1(\d{4}(?:-\d{2}){2} (?:\d{2}:){2}) \d{4}a digit, repeated exactly 4 times
Non-Capturing Group(?:-\d{2}){2} {2}repeats the group contents below exactly 2 times:
-the literal - (4510 / 558 / 2D16)
\d{2}a digit, repeated exactly 2 times
the literal (3210 / 408 / 2016)
Non-Capturing Group(?:\d{2}:){2} {2}repeats the group contents below exactly 2 times:
\d{2}a digit, repeated exactly 2 times
:the literal : (5810 / 728 / 3A16)
\d{2}a digit, repeated exactly 2 times
\.the literal . (4610 / 568 / 2E16)
\d{3}a digit, repeated exactly 3 times
Group 2( [+-]\d{2}:\d{2} ) the literal (3210 / 408 / 2016)
+the literal + (4310 / 538 / 2B16)
-the literal - (4510 / 558 / 2D16)
\d{2}a digit, repeated exactly 2 times
:the literal : (5810 / 728 / 3A16)
\d{2}a digit, repeated exactly 2 times
the literal (3210 / 408 / 2016)
\[the literal [ (9110 / 1338 / 5B16)
\d+a digit, repeated at least once
\]the literal ] (9310 / 1358 / 5D16)
- Startingthe literal text - Starting (case sensitive) Negated Character Class[^\n]* *matches any number of characters outside the set below:
\na line-feed (newline) character (ASCII 10)
Non-Capturing Group(?:\n\1\d{2}\.\d{3}\2\[\d+\][^\n]*)* *repeats the group contents below any number of times:
\na line-feed (newline) character (ASCII 10)
\1the text saved by group 1
\d{2}a digit, repeated exactly 2 times
\.the literal . (4610 / 568 / 2E16)
\d{3}a digit, repeated exactly 3 times
\2the text saved by group 2
\[the literal [ (9110 / 1338 / 5B16)
\d+a digit, repeated at least once
\]the literal ] (9310 / 1358 / 5D16)
Negated Character Class[^\n]* *matches any number of characters outside the set below:
\na line-feed (newline) character (ASCII 10)
\na line-feed (newline) character (ASCII 10)
\1the text saved by group 1
\d{2}a digit, repeated exactly 2 times
\.the literal . (4610 / 568 / 2E16)
\d{3}a digit, repeated exactly 3 times
\2the text saved by group 2
\[the literal [ (9110 / 1338 / 5B16)
\d+a digit, repeated at least once
\]the literal ] (9310 / 1358 / 5D16)
\3the text saved by group 3
Negated Character Class[^\n]* *matches any number of characters outside the set below:
\na line-feed (newline) character (ASCII 10)
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