<the literal < (6010 / 748 / 3C16)
.+?any character (except for line terminators), repeated at least once
Non-Capturing Group(?: (.+?)=(.+?))*? *?repeats the group contents below any number of times:
the literal (3210 / 408 / 2016)
.+?any character (except for line terminators), repeated at least once
=the literal = (6110 / 758 / 3D16)
.+?any character (except for line terminators), repeated at least once
>the literal > (6210 / 768 / 3E16)
.*?any character (except for line terminators), repeated any number of times
<the literal < (6010 / 748 / 3C16)
\/the literal / (4710 / 578 / 2F16)
\1the text saved by group 1
>the literal > (6210 / 768 / 3E16)
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