Billing Package for:the literal text Billing Package for: (case sensitive) \w{3}any word character, repeated exactly 3 times
\sany whitespace character
-the literal - (4510 / 558 / 2D16)
\sany whitespace character
BL:the literal text BL: (case sensitive) \w+any word character, repeated at least once
\s+any whitespace character, repeated at least once
TRANSID:the literal text TRANSID: (case sensitive) \d+a digit, repeated at least once
\s+any whitespace character, repeated at least once
-the literal - (4510 / 558 / 2D16)
\s+any whitespace character, repeated at least once
.+any character (except for line terminators), 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