Non-Capturing Group(?:\b[Tt]o:|\\b002;) \ba Unicode word boundary
Tthe literal T (8410 / 1248 / 5416) (case insensitive)
tthe literal t (11610 / 1648 / 7416) (case insensitive)
o:the literal text o: (case insensitive) \\the literal \ (9210 / 1348 / 5C16)
b002;the literal text b002; (case insensitive) \s*a Unicode whitespace character, repeated any number of times
.+?any Unicode character (except for line terminators), repeated at least once
\s*a Unicode whitespace character, repeated any number of times
<the literal < (6010 / 748 / 3C16)
Negated Character Class[^<>@]+ +matches at least one character outside the set below:
<the literal < (6010 / 748 / 3C16)
>the literal > (6210 / 768 / 3E16)
@the literal @ (6410 / 1008 / 4016)
@the literal @ (6410 / 1008 / 4016)
Negated Character Class[^<>@]+ +matches at least one character outside the set below:
<the literal < (6010 / 748 / 3C16)
>the literal > (6210 / 768 / 3E16)
@the literal @ (6410 / 1008 / 4016)
>the literal > (6210 / 768 / 3E16)
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
i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters