A character set contains expressions that identify specific characters and character ranges. You can use character sets in Labeler transformations and in Parser transformations that use token parsing mode.
Character ranges specify a sequential range of character codes. For example, the character range "[A-C]" matches the uppercase characters "A," "B," and "C." This character range does not match the lowercase characters "a," "b," or "c."
Use character sets to identify a specific character or range of characters as part of token parsing or labeling operations. For example, you can label all numerals in a column that contains telephone numbers. After labeling the numbers, you can identify patterns with a Parser transformation and write problematic patterns to separate outputs.