Character Class Meta-Character Matches
\p{Lower}Lowercase letter [a-z]
\p{Upper}Uppercase letter [A-Z]
\p{ASCII}All ASCII [\x00-\x7F]
\p{Alpha}Any lowercase or uppercase letter
\p{Digit}A digit [0–9]
\p{Alnum}Any letter or digit
\p{Punct}Punctuation [!"#$%&'()*+,-./:;?@[\]^_`{|}~]
\p{Graph}A visible character: any letter, digit, or punctuation
\p{Print}A printable character; same as \p{Graph}
\p{Blank}A space or tab [ \t]
\p{Cntrl}A control character [\x00-\x1F\x7F]
\p{XDigit}Hexadecimal digit [0–9a–fA–F]
\p{Space}A whitespace character [ \t\n\x0B\f\r]