\<the literal < (6010 / 748 / 3C16)
\>the literal > (6210 / 768 / 3E16)
\s+any whitespace character, repeated at least once
:the literal : (5810 / 728 / 3A16)
\s+any whitespace character, repeated at least once
Group field1(?<field1>\d+) \d+a digit, repeated at least once
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