The character set specified in RFC 2152. Two variants are supported using the encodeOptional constructor flag
super(name, aliases, BASE64_ALPHABET, false); if (includeOptional) this.directlyEncoded = SET_D + SET_O + RULE_3; else this.directlyEncoded = SET_D + RULE_3;
return directlyEncoded.indexOf(ch) >= 0;
return '+";
return '-";