\d+a Unicode decimal digit, repeated at least once
\/?optionally matches the literal / (4710 / 578 / 2F16)
\d+a Unicode decimal digit, repeated at least once
\sa Unicode whitespace character
+matches at least one character from the set below:
A-zone character from A (6510) to z (12210) (case sensitive)
.any Unicode character (except for line terminators)
\da Unicode decimal digit
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