In automata theory, the class of unrestricted grammars (also called semi-Thue, type-0 or phrase structure grammars) is the most general class of grammars in the Chomsky hierarchy. No restrictions are made on the productions of an unrestricted grammar, other than each of their left-hand sides being non-empty.[1]: 220 This grammar class can generate arbitrary recursively enumerable languages.
^Cite error: The named reference Hopcroft.Ullman.1979 was invoked but never defined (see the help page).
and 20 Related for: Unrestricted grammar information
that every noncontracting grammar generates a context-sensitive language. There is a similar normal form for unrestrictedgrammars as well, which at least...
regular languages, respectively. Although much less powerful than unrestrictedgrammars (Type 0), which can in fact express any language that can be accepted...
security. The membership problem for leftist grammars is decidable. Unrestrictedgrammar String rewriting Motwani, Rajeev; Panigrahy, Rina; Saraswat, Vijay;...
limits of computing. The Turing machine is capable of processing an unrestrictedgrammar, which further implies that it is capable of robustly evaluating...
In formal language theory, an LL grammar is a context-free grammar that can be parsed by an LL parser, which parses the input from Left to right, and...
relevant chapter with a quote from GEB. Invariant (mathematics) Unrestrictedgrammar Here, x and y are variables, standing for strings of symbols. A rule...
parser Topics on recursively enumerable language: Turing machine unrestrictedgrammar Other related topics: Moore machine Mealy machine L-system JFLAP...
In computer science, a grammar is informally called a recursive grammar if it contains production rules that are recursive, meaning that expanding a non-terminal...
and Arto Anttila, editors. 1995. Constraint Grammar: A Language-Independent System for Parsing Unrestricted Text. Natural Language Processing, No 4. Mouton...
hierarchy of generative grammars: Finite-State Grammars, Context-Free Grammars, Context-Sensitive Grammars as well as UnrestrictedGrammars, using either a text...
single elements and terminals), the grammar generates all the grammatical sentences of the language, and an unrestricted (or "infinite") number of sentences...
for creating unrestricted graph grammars as well as testing and searching the resultant language variant. It saves graphs and graph grammar rules as XML...
language theory, a regular tree grammar is a formal grammar that describes a set of directed trees, or terms. A regular word grammar can be seen as a special...
This article describes the grammar of the Old Irish language. The grammar of the language has been described with exhaustive detail by various authors...
developments in early generative grammar. In it, Chomsky introduced his idea of a transformational generative grammar, succinctly synthesizing and integrating...
only required for idioms as lexical entries. Certain idioms, allowing unrestricted syntactic modification, can be said to be metaphors. Expressions such...
Most representationalists endorse an unrestricted version of representationalism. According to the unrestricted version, for any state with phenomenal...
; Shamir, E. (1961), "On formal properties of simple phrase structure grammars", Zeitschrift für Phonetik, Sprachwissenschaft und Kommunikationsforschung...
Global Information