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Control tables are tables that control the control flow or play a major part in program control. There are no rigid rules about the structure or content of a control table—its qualifying attribute is its ability to direct control flow in some way through "execution" by a processor or interpreter. The design of such tables is sometimes referred to as table-driven design〔''Programs from decision tables'', Humby, E., 2007,Macdonald, 1973 ... Biggerstaff, Ted J. Englewood Cliffs, NJ : Prentice-Hall ISBN 0-444-19569-6〕〔()〕 (although this typically refers to generating code automatically from external tables rather than direct run-time tables). In some cases, control tables can be specific implementations of finite-state-machine-based automata-based programming. If there are several hierarchical levels of control table they may behave in a manner equivalent to UML state machines〔UML state machine#Hierarchically nested states〕 Control tables often have the equivalent of conditional expressions or function references embedded in them, usually implied by their relative column position in the association list. Control tables reduce the need for programming similar structures or program statements over and over again. The two-dimensional nature of most tables makes them easier to view and update than the one-dimensional nature of program code. In some cases, non-programmers can be assigned to maintain the control tables. ==Typical usage== * Transformation of input values to: * * an index, for later branching or pointer lookup * * a program name, relative subroutine number, program label or program offset, to alter control flow * Controlling a main loop in event-driven programming using a control variable for state transitions * Controlling the program cycle for Online transaction processing applications 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Control table」の詳細全文を読む スポンサード リンク
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