^start of line
\s*any whitespace character, repeated any number of times
\S*any non-whitespace character, repeated any number of times
\w*any word character, repeated any number of times
\W*any non-word character, repeated any number of times
Group severity(?<severity>\w) Group time(?<time>\d{4}\s[^\s]*) \d{4}a digit, repeated exactly 4 times
\sany whitespace character
Negated Character Class[^\s]* *matches any number of characters outside the set below:
\sany whitespace character
\s+any whitespace character, repeated at least once
\d+a digit, repeated at least once
\s+any whitespace character, repeated at least once
Group source(?<source>[^ \]]+) Negated Character Class[^ \]]+ +matches at least one character outside the set below:
the literal (3210 / 408 / 2016)
\]the literal ] (9310 / 1358 / 5D16)
\]the literal ] (9310 / 1358 / 5D16)
Group message(?<message>.*\n) .*any character (except for line terminators), repeated any number of times
\na line-feed (newline) character (ASCII 10)
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string
g modifier: global. Finds all matches instead of stopping after the first