caa a22 4500 467988595 CHVBK 20180323112538.0 cr unu---uuuuu 170328e19901001xx s 000 0 eng 10.1007/BF03037517 doi (NATIONALLICENCE)springer-10.1007/BF03037517 Wilmes Thomas Institut für Informatik und Praktische Mathematik, Christian-Albrechts-Universität Kiel, Olshausenstr, 40, D-2300, Kiel, Federal Republic of Germany aut A generalized approach to metaprogramming in logic grammars [Elektronische Daten] [Thomas Wilmes] This paper extends Definite Clause Grammars (DCGs) by a metaprogramming facility which supports sequences of items (terminals, nonterminals, Prolog goals, etc.) as values of variables. Variables may be employed themselves as a new sort of item in the right-hand side of a rule, in order to activate the respective item sequences they are instantiated to. In addition, so-called assignments render it possible to save the terminal string derived from an item (or even from an item sequence) in a variable for later manipulation, or to unify it with another string. The new approach, called Assignment Metagrammars (AMGs), is compared with H. Abramson's meta-nonterminals and the Discontinuous Grammars (DGs) or Gapping Grammars (GGs) proposed by V. Dahl and H. Abramson. AMGs are implemented by a compiler that translates them into efficient Prolog programs. Ohmsha, Ltd. and Springer, 1990 Definite Clause Grammars nationallicence Meta-Nonterminals nationallicence Metaprogramming nationallicence Discontinuous Grammars nationallicence Gapping Grammars nationallicence Assignment Metagrammars nationallicence New Generation Computing Springer-Verlag 8/3(1990-10-01), 211-223 0288-3635 8:3<211 1990 8 354 https://doi.org/10.1007/BF03037517 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF03037517 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Wilmes Thomas Institut für Informatik und Praktische Mathematik, Christian-Albrechts-Universität Kiel, Olshausenstr, 40, D-2300, Kiel, Federal Republic of Germany aut NATIONALLICENCE 773 0- New Generation Computing Springer-Verlag 8/3(1990-10-01), 211-223 0288-3635 8:3<211 1990 8 354 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer