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Direction controlled programmed grammars. (English) Zbl 0244.68037

MSC:
68Q45 Formal languages and automata
68N01 General topics in the theory of software
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References:
[1] Abraham, S.: Some questions of phrase structure grammars. Computational Linguistics 4 (1965).
[2] Aho, A. V.: Indexed grammars- an extension of context-free grammars. Journal of the A.C.M. 15, No. 4, Oct. (1968). · Zbl 0175.27801
[3] Greibach, S., Hopcroft, J.: Scattered context grammars. Journal of Computer and System Sciences, 3 (1969). · Zbl 0174.02801
[4] Hopcroft, J., Ullman, J.: Formal languages and their relation to automata. Addison-Wesley Publ. Comp. 1969. · Zbl 0196.01701
[5] Rosenkrantz, D.: Programmed grammars and classes of formal languages. Journal of the A.C.M. 16, No. 1 (1969). · Zbl 0182.02004
[6] Rozenberg, G.: On the introduction of orderings into the grammars of Chomsky’s hierarchy. Bulletin de l’AcadĂ©mie Polonaise des Sciences 17, No. 9 (1969). · Zbl 0193.32601
[7] Stotsky, E.: Some restrictions on derivations in context-sensitive grammars. Russian Acad. of Sciences N.T.I, s. 2. 7 (1967) [in Russian].
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