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  2. Linear grammar - Wikipedia

    en.wikipedia.org/wiki/Linear_grammar

    All linear languages are context-free; conversely, an example of a context-free, non-linear language is the Dyck language of well-balanced bracket pairs. Hence, the regular languages are a proper subset of the linear languages, which in turn are a proper subset of the context-free languages.

  3. Linear unit grammar - Wikipedia

    en.wikipedia.org/wiki/Linear_Unit_Grammar

    In Linear Unit Grammar (2006), the authors describe their "study of language in use and how people manage it, handle it, cope with it and interpret it". [3] It is a "descriptive apparatus and method which aims at integrating all or most of the superficially different varieties of English."

  4. LR parser - Wikipedia

    en.wikipedia.org/wiki/LR_parser

    The grammar doesn't cover all language rules, such as the size of numbers, or the consistent use of names and their definitions in the context of the whole program. LR parsers use a context-free grammar that deals just with local patterns of symbols. The example grammar used here is a tiny subset of the Java or C language: r0: Goal → Sums eof

  5. Regular grammar - Wikipedia

    en.wikipedia.org/wiki/Regular_grammar

    A right-regular grammar (also called right-linear grammar) is a formal grammar (N, Σ, P, S) in which all production rules in P are of one of the following forms: A → a; A → aB; A → ε; where A, B, S ∈ N are non-terminal symbols, a ∈ Σ is a terminal symbol, and ε denotes the empty string, i.e. the string of length 0. S is called the ...

  6. Context-free grammar - Wikipedia

    en.wikipedia.org/wiki/Context-free_grammar

    It is decidable whether a given grammar is a regular grammar, [f] as well as whether it is an LL grammar for a given k≥0. [26]: 233 If k is not given, the latter problem is undecidable. [26]: 252 Given a context-free grammar, it is not decidable whether its language is regular, [27] nor whether it is an LL(k) language for a given k.

  7. Chomsky hierarchy - Wikipedia

    en.wikipedia.org/wiki/Chomsky_hierarchy

    A formal grammar describes how to form strings from a language's vocabulary (or alphabet) that are valid according to the language's syntax. The linguist Noam Chomsky theorized that four different classes of formal grammars existed that could generate increasingly complex languages.

  8. Syntax - Wikipedia

    en.wikipedia.org/wiki/Syntax

    In linguistics, syntax (/ ˈ s ɪ n t æ k s / SIN-taks) [1] [2] is the study of how words and morphemes combine to form larger units such as phrases and sentences.Central concerns of syntax include word order, grammatical relations, hierarchical sentence structure (constituency), [3] agreement, the nature of crosslinguistic variation, and the relationship between form and meaning ().

  9. Deterministic context-free grammar - Wikipedia

    en.wikipedia.org/wiki/Deterministic_context-free...

    DCFGs are of great practical interest, as they can be parsed in linear time and in fact a parser can be automatically generated from the grammar by a parser generator. They are thus widely used throughout computer science. Various restricted forms of DCFGs can be parsed by simpler, less resource-intensive parsers, and thus are often used.