TOKEN - Identifies that the Lex-Items produced by this stage are tokens and not text blocks.
ORIGINAL - Identifies that the Lex-Items produced by this stage are the original, as written, representation of every token (e.g. before normalization).
HAS_DIGIT - Tokens produced with at least one digit character are tagged as HAS_DIGIT.
HAS_PUNCTUATION - Tokens produced with at least one punctuation character are tagged as HAS_PUNCTUATION.