\w+any word character, repeated at least once
{*the literal { (12310 / 1738 / 7B16) , repeated any number of times
Non-Capturing Group(?:[a-zA-Z]+=*[\w=,]*)? ?repeats the group contents below at most once:
+matches at least one character from the set below:
a-zone character from a (9710) to z (12210) (case sensitive)
A-Zone character from A (6510) to Z (9010) (case sensitive)
=*the literal = (6110 / 758 / 3D16) , repeated any number of times
*matches any number of characters from the set below:
\wany word character
=the literal = (6110 / 758 / 3D16)
,the literal , (4410 / 548 / 2C16)
}*the literal } (12510 / 1758 / 7D16) , repeated any number of times