Within the field of computer science, specifically in the area of formal languages, the Chomsky hierarchy ( occasionally referred to as Chomsky – Schützenberger hierarchy ) is a containment hierarchy of classes of formal grammars.

This hierarchy of grammars was described by Noam Chomsky in 1956.

Set inclusions described by the Chomsky hierarchy

* Chomsky hierarchy

That is one of the four types of grammars in the Chomsky hierarchy.

* Chomsky hierarchy

The grammar needed to specify a programming language can be classified by its position in the Chomsky hierarchy.

In the Chomsky hierarchy, regular languages are defined to be the languages that are generated by Type-3 grammars ( regular grammars ).

One way to measure the power of a computational model is to study the class of formal languages that the model can generate ; in such a way to the Chomsky hierarchy of languages is obtained.

* Chomsky hierarchy

L-system grammars are very similar to the semi-Thue grammar ( see Chomsky hierarchy ).

The AIML pattern syntax is a very simple pattern language, substantially less complex than regular expressions and as such not even of level 3 in the Chomsky hierarchy.

Recursively enumerable languages are known as type-0 languages in the Chomsky hierarchy of formal languages.

This idea was formalized by Chomsky in the Chomsky hierarchy.

# REDIRECT Chomsky hierarchy

# REDIRECT Chomsky hierarchy

* Chomsky hierarchy, in computer science, a containment hierarchy of classes of formal grammars

In the same article, Chomsky casts the theme of a larger research program in terms of the following question: " How little can be attributed to UG while still accounting for the variety of I-languages attained, relying on third factor principles?

To see that Chomsky does not use the term " UG " in the narrow sense UG * suggested above, consider the following quote from the same article:

Some people, such as the following authors, have inferred, insinuated, or suggested that entering a state of perpetual war becomes progressively easier in a modern democratic republic, such as the United States, due to the development of a relationship network between people who wield political and economic power also owning capital in companies that financially profit from war, lobby for war, and influence public opinion of war through influence of Mass media outlets that control the presentation for the causes of war, the effects of war, and the Censorship of war: ( 1 ) " The Iron Triangle: Inside the Secret World of the Carlyle Group " ( 2004 )" by Dan Briody ; ( 2 ) " The Pentagon Labyrinth: 10 Short Essays to Help You Through It " ( 2011 ) an anthology by nine authors who are Pierre M. Sprey, George Wilson, Franklin C. Spinney, Bruce I. Gudmundsson, Col. G. I. Wilson, Col. Chet Richards, Andrew Cockburn, Thomas Christie, and Winslow T. Wheeler ; ( 3 ) " Prophets of War: Lockheed Martin and the Making of the Military-Industrial Complex " ( 2010 ), by William D. Hartung ; ( 4 ) " Media Control, Second Edition: The Spectacular Achievements of Propaganda ( 2002 ), by Noam Chomsky ; and ( 5 ) " Manufacturing Consent: The Political Economy of the Mass Media " ( 2002 ), by Edward S. Herman and Noam Chomsky.

Chomsky has made extensive use of its explanative power to lend support to his interpretations of mainstream media attitudes towards a wide array of events, including the following:

Chomsky presents MP as a program, not as a theory, following Imre Lakatos's distinction.

Evans continues to be strongly criticised by many commentators – most prominently Noam Chomsky and John Pilger – for supporting Australia ’ s recognition of Indonesian sovereignty over East Timor following its military invasion in 1975, negotiating ( and celebrating ‘ replete with champagne ’) with then Indonesian Foreign Minister Ali Alatas the Timor Gap Treaty, and describing the 1991 Dili massacre as ' an aberration, not an act of state policy '.

In 1957, Noam Chomsky published Syntactic Structures, in which he developed the idea that each sentence in a language has two levels of representation — a deep structure and a surface structure.

Initially, two additional levels of representation were introduced ( LF — Logical Form, and PF — Phonetic Form ), and then in the 1990s Chomsky sketched out a new program of research known as Minimalism, in which Deep Structure and Surface Structure no longer featured and PF and LF remained as the only levels of representation.

There are however lots of subsets of problems which may be translated automatically, especially in the higher numbered levels of the Chomsky hierarchy.

In an organization, the hierarchy usually consists of a singular / group of power at the top with subsequent levels of power beneath them.

The verdict read: " According to the indictment, this group consists of about 130 officers who held certain positions in the military hierarchy between 1938 and 1945 ...

COCOMO consists of a hierarchy of three increasingly detailed and accurate forms.

At each level in the hierarchy, the priesthood is organized by quorums, led by a presidency which usually consists of a president and two counselors.

Within Canada the hierarchy consists of:

Within Nigeria the hierarchy consists of:

Within Kenya the hierarchy consists of:

At the present time, the hierarchy consists of:

It consists of an interpreter environment, a compiler and a library, which defines a strongly typed, mathematically ( mostly ) correct type hierarchy.

Within Portugal, the hierarchy consists of archbishops and bishops.

Within the Dominican Republic the hierarchy consists of:

Within Benin the hierarchy consists of:

Within Ivory Coast the hierarchy consists of:

Within Cameroon the hierarchy consists of:

TST has a linear hierarchy of types: type 0 consists of individuals otherwise undescribed.

ICS consists of a standard management hierarchy and procedures for

The party hierarchy consists of the Regional Bureaus, which look after two or three states each, the State Committees, the Zonal Committees, the District Committees, and the " dalams " ( armed squads ).

* The anthropological basis of LdL is related to the pyramid or hierarchy of needs introduced by Abraham Maslow, which consists, from base to peak, of 1 ) physiological needs, 2 ) safety / security, 3 ) social / love / belonging, 4 ) esteem / self-confidence and 5 ) being / growth through self-actualization and self-transcendence.

A MO: DCA file consists of a sequential, ordered hierarchy of independent objects-documents, pages, data objects, and resource objects such as fonts and ICC profiles.

Within Croatia the hierarchy consists of:

State logic enables users to model the application they are trying to control by using a hierarchy that consists of Tasks, subdivided by States which are described by Statements.

The administrative hierarchy of Mali consists of Regions, then Cercles, then Arrondissements.

Its team consists of students with the hierarchy order as Overall Coordinators, Core Group Members, Coordinators and Organisers.