<the literal < (6010 / 748 / 3C16)
\/?optionally matches the literal / (4710 / 578 / 2F16)
\w+any word character, repeated at least once
Group 1(\s+\w+=(['"]).*\2)* *repeats the group contents below any number of times:
\s+any whitespace character, repeated at least once
\w+any word character, repeated at least once
=the literal = (6110 / 758 / 3D16)
'the literal ' (3910 / 478 / 2716)
"the literal " (3410 / 428 / 2216)
.*any character (except for line terminators), repeated any number of times
\2the text saved by group 2
\s*any whitespace character, repeated any number of times
\/?optionally matches the literal / (4710 / 578 / 2F16)
\s*any whitespace character, repeated any number of times
>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