Quote: associative language descriptions (ALD) use permissible contexts instead of nonterminals; subset of context-free languages; unique ALD for a set of trees

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Associative language descriptions (ALD) are a recent grammar … programming languages. ALD does not use nonterminal symbols, … [p. 105] An ALD consists of purely terminal patterns … [p. 106] ALD languages are non-counting … Two constructs which occur in two contexts which … [p. 108] [ALD] patterns represent the shortest valid strings … or more place holders, that permit … insertions of other patterns. Insertions are controlled by … [p. 109] The ALD family of languages is strictly … In order to shorten the ALD [for Pascal and other complex languages] … , we use two convenient devices: Cartesian products … [p. 120] The relative sizes of ALD and CF … Another valuable property of the model is the …   Google-1   Google-2

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