Context-Free Grammars with Graph Controlled Tables
نویسندگان
چکیده
منابع مشابه
Context-Free Graph Grammars
Graph grammars have been studied by several authors. The motivations of these works have arisen from completely different areas of computer science, such as picture processing (Pfaltz and Rosenfeld, 1969; Montanari, 1970; Rosenfeld and Milgram, 1972; Pavlidis, 1972; Abe et al., 1973; Furtado and Mylopoulos, 1975; Fu and Brayer, 1975) or formal semantics of programming languages (Pratt, 1971). I...
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In modern mathematics, graphs figure as one of the better-investigated class of mathematical objects. Various properties of graphs, as well as graph-processing algorithms, can be useful if graphs of a certain kind are used as denotations for CF-grammars. Furthermore, graph are well adapted to various extensions (one kind of such extensions being attributes). This paper describes a class of grap...
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A derivation step in a Graph Interpolation Grammar has the effect of scanning an input token. This feature, which aims at emulating the incrementality of the natural parser, restricts the formal power of GIGs. This contrasts with the fact that the derivation mechanism involves a context-sensitive device similar to tree adjunction in TAGs. The combined effect of input-driven derivation and restr...
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The semantics of a recursive query in the context of a relational database can be formalized in terms ofa context-free graph grammar associated with it. This grammargenerates oriented, labeled hypergraphs. The labels of the hypercdges of these hypergraphs, called the computation graphs of the query, are the names of the relations forming the database under consideration. Some
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The main idea of this paper is to show some important differences between graph grammars and hypergraph grammars in context of freeness. On the other hand, we give a possibility to transform the planar structure of a hypergraph into a linear one with concern of determinism. This can create a path to transform a pushdown automaton into a generative grammar equivalent. Key-Words: Hyperedge Replac...
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ژورنال
عنوان ژورنال: DAIMI Report Series
سال: 1975
ISSN: 2245-9316,0105-8517
DOI: 10.7146/dpb.v4i43.6463