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In this paper, we have introduced a new style of formal grammars called String Adjunct Grammars (AG). The rules in an AG have a considerably different formal character as compared to the 'rewrite rule' in a Phrase Structure Grammar (PSG). Such a study of formal grammars of different styles (i.e., formal character of rules) is of great interest because each style is well suited for characterizing certain...
The problem of assigning a probability to each string of a language L(G) generated by a grammar G is considered. Two methods are considered. One method assigns a probability to each production associated with G and the other assigns the probabilities on the basis of particular features of the language. Several necessary conditions that must be satisfied by these probability assignment techniques if...
A context-sensitive grammar G is said to be CS(k) iff a particular kind of table-driven parser, Jk(G), exists. Corresponding to each Jk(G), we define a class of parsers Jk(G). Jk(G) is itself a Jk(G). The main results are: 1. Any processor Jk(G) for a CS(k) grammar G accepts exactly the sentences of G. 2. The set of languages generable by CS(k) grammars is exactly the set of languages accepted by...
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