Types of bowlers in cricket batsman Simon Katich. Beau Casson, another Australian is another fine left arm chinaman bowler. Finger spinners make use of their fingers to rotate the ball. A right-arm finger spinner is known as an off-spinner and their mode of bowling is known as off break. The ball will appear to move just as the chinaman does, from off to leg for a right-handed batsman. Muttiah Muralitharan (often called "Murali") of Sri Lanka and Graeme Swann of England, two of the most successful bowlers in Test and ODI cricket history, are off-spinners. Murali's bowling style is unique, while Swann's is more conventional.
Controlled vocabulary difficult issues. Choices of authorized terms are based on the principles of "user warrant" (what terms users are likely to use), "literary warrant" (what terms are generally used in the literature and documents), and "structural warrant" (terms chosen by considering the structure, scope of the controlled vocabulary). Controlled vocabularies also typically handle the problem of homographs, with qualifiers. For example, the term "pool" has to be qualified to refer to either "swimming pool" or the game "pool" to ensure that each authorized term or heading refers to only one concept. There are two main kinds of controlled vocabulary tools used