The delivered stopword file cc_join.stp has the following character class definitions:
AJ="\u0021-\u002F\u003A\u003C-\u0040\u005B- \u0060\u007B-\u007E"
AL="\u0041-\u005A\u0061-\u007A\u00E0-\u00FE\u0030- \u0039"
DI=""
DJ=""
This translates to:
AL contains A-Z, a-z, 0-9, and all supplemental text characters.
AJ contains all punctuation marks except ";".
DI contains nothing.
DJ contains nothing.
AC still contains the supplemental punctuation characters.