Search keywords may be whole words or only a beginning fragment shared by many different words. For example, the search keyword "CO" exactly matches the abbreviation for the State of Colorado. When considered as a beginning fragment, however, An exact match can be requested by suffixing the search keyword with an exclamation-mark ( By default, however, search keywords are matched with indexed keywords using an open-ended matching algorithm. Using this mode, a search keyword will match any indexed keyword which begins with the same text: any remaining text on the end of the indexed keywords does not matter. For example, Open-ended matching allows the user to supply only the first few significant characters of a desired word; if the desired word is very long or especially unique, this mode can save the user from excessive typing. This mode is also useful to match grammatically-related words, such as plurals and verbal conjugations, by giving only a single search keyword that comprises the common root of several related words.Matching Modes