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Thursday, January 18, 2024

Citizenship

From Wikipedia, the free encyclopedia
 
Citizenship is the enjoyment by a natural person of civil and political rights of a polity, as well as the incurring of duties, which are not afforded to non-citizens.

Though citizenship is often legally conflated with nationality in today's Anglo-Saxon world, international law does not usually use the term citizenship to refer to nationality, these two notions being conceptually different dimensions of collective membership.

Generally citizenships have no expiration and allow persons to work, reside and vote in the polity, as well as identify with the polity, possibly acquiring a passport. Though through discriminatory laws, like disfranchisement and outright apartheid citizens have been made second-class citizens. Historically, populations of states were mostly subjects, while citizenship was a particular status which originated in the rights of urban populations, like the rights of the male public of cities and republics, particularly ancient city-states, giving rise to a civitas and the social class of the burgher or bourgeoisie. Since then states have expanded the status of citizenship to most of their national people, while the extent of citizen rights remain contested.

Definition

Conceptually citizenship and nationality are different dimensions of state membership. Citizenship is focused on the internal political life of the state and nationality is the dimension of state membership in international law. Article 15 of the Universal Declaration of Human Rights states that everyone has the right to nationality. As such nationality in international law can be called and understood as citizenship, or more generally as subject or belonging to a sovereign state, and not as ethnicity. This notwithstanding, around 10 million people are stateless.

In the contemporary era, the concept of full citizenship encompasses not only active political rights, but full civil rights and social rights.

Historically, the most significant difference between a national and a citizen is that the citizen has the right to vote for elected officials, and the right to be elected. This distinction between full citizenship and other, lesser relationships goes back to antiquity. Until the 19th and 20th centuries, it was typical for only a certain percentage of people who belonged to the state to be considered as full citizens. In the past, a number of people were excluded from citizenship on the basis of sex, socioeconomic class, ethnicity, religion, and other factors. However, they held a legal relationship with their government akin to the modern concept of nationality.

Determining factors

A person can be recognized as a citizen on a number of bases.

  • Nationality. Nationality and citizenship are generally indissociable, citizenship being in most cases a consequence of nationality.
  • Place of residence. In some countries, foreign residents have citizenship rights and can vote.
  • Citizenship by honorary conferment. This type of citizenship is conferred to an individual as a sign of honour.
  • Excluded categories. In most countries, minors are not considered as full citizens. In the past, there have been exclusions on entitlement to citizenship on grounds such as skin color, ethnicity, sex, land ownership status, and free status (not being a slave). Most of these exclusions no longer apply in most places. Modern examples include some Gulf countries which rarely grant citizenship to non-Muslims, e.g. Qatar is known for granting citizenship to foreign athletes, but they all have to profess the Islamic faith in order to receive citizenship. The United States grants citizenship to those born as a result of reproductive technologies, and internationally adopted children born after February 27, 1983. Some exclusions still persist for internationally adopted children born before February 27, 1983, even though their parents meet citizenship criteria.

Responsibilities of a citizen

Every citizen has obligations that are required by law and some responsibilities that benefit the community. Obeying the laws of a country and paying taxes are some of the obligations required of citizens by law. Voting and community services form part of responsibilities of a citizen that benefits the community.

The Constitution of Ghana (1992), Article 41, obligates citizens to promote the prestige and good name of Ghana and respect the symbols of Ghana. Examples of national symbols includes the Ghanaian flag, coat of arms, money, and state sword. These national symbols must be treated with respect and high esteem by citizens since they best represent Ghanaians.

Apart from responsibilities, citizens also have rights. Some of the rights are the right to pursue life, liberty and happiness, the right to worship, right to run for elected office and right to express oneself.

Polis

Many thinkers such as Giorgio Agamben in his work extending the biopolitical framework of Foucault's History of Sexuality in the book, Homo Sacer, point to the concept of citizenship beginning in the early city-states of ancient Greece, although others see it as primarily a modern phenomenon dating back only a few hundred years and, for humanity, that the concept of citizenship arose with the first laws. Polis meant both the political assembly of the city-state as well as the entire society. Citizenship concept has generally been identified as a western phenomenon. There is a general view that citizenship in ancient times was a simpler relation than modern forms of citizenship, although this view has come under scrutiny. The relation of citizenship has not been a fixed or static relation but constantly changed within each society, and that according to one view, citizenship might "really have worked" only at select periods during certain times, such as when the Athenian politician Solon made reforms in the early Athenian state. Citizenship was also contingent on a variety of biopolitical assemblages, such as the bioethics of emerging Theo-Philosophical traditions. It was necessary to fit Aristotle's definition of the besouled (the animate) to obtain citizenship: neither the sacred olive tree nor spring would have any rights.

An essential part of the framework of Greco-Roman ethics is the figure of Homo Sacer or the bare life.

Historian Geoffrey Hosking in his 2005 Modern Scholar lecture course suggested that citizenship in ancient Greece arose from an appreciation for the importance of freedom. Hosking explained:

It can be argued that this growth of slavery was what made Greeks particularly conscious of the value of freedom. After all, any Greek farmer might fall into debt and therefore might become a slave, at almost any time ... When the Greeks fought together, they fought in order to avoid being enslaved by warfare, to avoid being defeated by those who might take them into slavery. And they also arranged their political institutions so as to remain free men.

— Geoffrey Hosking, 2005
Geoffrey Hosking suggests that fear of being enslaved was a central motivating force for the development of the Greek sense of citizenship. Sculpture: a Greek woman being served by a slave-child.

Slavery permitted slave-owners to have substantial free time and enabled participation in public life.[20] Polis citizenship was marked by exclusivity. Inequality of status was widespread; citizens (πολίτης politēs < πόλις 'city') had a higher status than non-citizens, such as women, slaves, and resident foreigners (metics). The first form of citizenship was based on the way people lived in the ancient Greek times, in small-scale organic communities of the polis. The obligations of citizenship were deeply connected to one's everyday life in the polis. These small-scale organic communities were generally seen as a new development in world history, in contrast to the established ancient civilizations of Egypt or Persia, or the hunter-gatherer bands elsewhere. From the viewpoint of the ancient Greeks, a person's public life could not be separated from their private life, and Greeks did not distinguish between the two worlds according to the modern western conception. The obligations of citizenship were deeply connected with everyday life. To be truly human, one had to be an active citizen to the community, which Aristotle famously expressed: "To take no part in the running of the community's affairs is to be either a beast or a god!" This form of citizenship was based on the obligations of citizens towards the community, rather than rights given to the citizens of the community. This was not a problem because they all had a strong affinity with the polis; their own destiny and the destiny of the community were strongly linked. Also, citizens of the polis saw obligations to the community as an opportunity to be virtuous, it was a source of honor and respect. In Athens, citizens were both rulers and ruled, important political and judicial offices were rotated and all citizens had the right to speak and vote in the political assembly.

Roman ideas

In the Roman Empire, citizenship expanded from small-scale communities to the entirety of the empire. Romans realized that granting citizenship to people from all over the empire legitimized Roman rule over conquered areas. Roman citizenship was no longer a status of political agency, as it had been reduced to a judicial safeguard and the expression of rule and law. Rome carried forth Greek ideas of citizenship such as the principles of equality under the law, civic participation in government, and notions that "no one citizen should have too much power for too long", but Rome offered relatively generous terms to its captives, including chances for lesser forms of citizenship. If Greek citizenship was an "emancipation from the world of things", the Roman sense increasingly reflected the fact that citizens could act upon material things as well as other citizens, in the sense of buying or selling property, possessions, titles, goods. One historian explained:

The person was defined and represented through his actions upon things; in the course of time, the term property came to mean, first, the defining characteristic of a human or other being; second, the relation which a person had with a thing; and third, the thing defined as the possession of some person.

— J. G. A. Pocock, 1998

Roman citizenship reflected a struggle between the upper-class patrician interests against the lower-order working groups known as the plebeian class. A citizen came to be understood as a person "free to act by law, free to ask and expect the law's protection, a citizen of such and such a legal community, of such and such a legal standing in that community". Citizenship meant having rights to have possessions, immunities, expectations, which were "available in many kinds and degrees, available or unavailable to many kinds of person for many kinds of reason". The law itself was a kind of bond uniting people. Roman citizenship was more impersonal, universal, multiform, having different degrees and applications.

Middle Ages

During the European Middle Ages, citizenship was usually associated with cities and towns (see medieval commune), and applied mainly to middle-class folk. Titles such as burgher, grand burgher (German Großbürger) and the bourgeoisie denoted political affiliation and identity in relation to a particular locality, as well as membership in a mercantile or trading class; thus, individuals of respectable means and socioeconomic status were interchangeable with citizens.

During this era, members of the nobility had a range of privileges above commoners (see aristocracy), though political upheavals and reforms, beginning most prominently with the French Revolution, abolished privileges and created an egalitarian concept of citizenship.

Renaissance

During the Renaissance, people transitioned from being subjects of a king or queen to being citizens of a city and later to a nation. Each city had its own law, courts, and independent administration. And being a citizen often meant being subject to the city's law in addition to having power in some instances to help choose officials. City dwellers who had fought alongside nobles in battles to defend their cities were no longer content with having a subordinate social status but demanded a greater role in the form of citizenship. Membership in guilds was an indirect form of citizenship in that it helped their members succeed financially. The rise of citizenship was linked to the rise of republicanism, according to one account, since independent citizens meant that kings had less power.  Citizenship became an idealized, almost abstract, concept, and did not signify a submissive relation with a lord or count, but rather indicated the bond between a person and the state in the rather abstract sense of having rights and duties.

Modern times

The modern idea of citizenship still respects the idea of political participation, but it is usually done through "elaborate systems of political representation at a distance" such as representative democracy. Modern citizenship is much more passive; action is delegated to others; citizenship is often a constraint on acting, not an impetus to act. Nevertheless, citizens are usually aware of their obligations to authorities and are aware that these bonds often limit what they can do.

United States

Portrait of Dred Scott, the plaintiff in the infamous Dred Scott v. Sandford case at the Supreme Court of the United States, commissioned by a "group of Negro citizens" and presented to the Missouri Historical Society, St. Louis, in 1888

From 1790 until the mid-twentieth century, United States law used racial criteria to establish citizenship rights and regulate who was eligible to become a naturalized citizen. The Naturalization Act of 1790, the first law in U.S. history to establish rules for citizenship and naturalization, barred citizenship to all people who were not of European descent, stating that "any alien being a free white person, who shall have resided within the limits and under the jurisdiction of the United States for the term of two years, maybe admitted to becoming a citizen thereof."

Under early U.S. laws, African Americans were not eligible for citizenship. In 1857, these laws were upheld in the US Supreme Court case Dred Scott v. Sandford, which ruled that "a free negro of the African race, whose ancestors were brought to this country and sold as slaves, is not a 'citizen' within the meaning of the Constitution of the United States," and that "the special rights and immunities guaranteed to citizens do not apply to them."

It was not until the abolition of slavery following the American Civil War that African Americans were granted citizenship rights. The 14th Amendment to the U.S. Constitution, ratified on July 9, 1868, stated that "all persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside." Two years later, the Naturalization Act of 1870 would extend the right to become a naturalized citizen to include "aliens of African nativity and to persons of African descent".

Despite the gains made by African Americans after the Civil War, Native Americans, Asians, and others not considered "free white persons" were still denied the ability to become citizens. The 1882 Chinese Exclusion Act explicitly denied naturalization rights to all people of Chinese origin, while subsequent acts passed by the US Congress, such as laws in 1906, 1917, and 1924, would include clauses that denied immigration and naturalization rights to people based on broadly defined racial categories. Supreme Court cases such as Ozawa v. the United States (1922) and U.S. v. Bhagat Singh Thind (1923), would later clarify the meaning of the phrase "free white persons," ruling that ethnically Japanese, Indian, and other non-European people were not "white persons", and were therefore ineligible for naturalization under U.S. law.

Native Americans were not granted full US citizenship until the passage of the Indian Citizenship Act in 1924. However, even well into the 1960s, some state laws prevented Native Americans from exercising their full rights as citizens, such as the right to vote. In 1962, New Mexico became the last state to enfranchise Native Americans.

It was not until the passage of the Immigration and Nationality Act of 1952 that the racial and gender restrictions for naturalization were explicitly abolished. However, the act still contained restrictions regarding who was eligible for US citizenship and retained a national quota system which limited the number of visas given to immigrants based on their national origin, to be fixed "at a rate of one-sixth of one percent of each nationality's population in the United States in 1920". It was not until the passage of the Immigration and Nationality Act of 1965 that these immigration quota systems were drastically altered in favor of a less discriminatory system.

Union of the Soviet Socialist Republics

The 1918 constitution of revolutionary Russia granted citizenship to any foreigners who were living within the Russian Soviet Federative Socialist Republic, so long as they were "engaged in work and [belonged] to the working class." It recognized "the equal rights of all citizens, irrespective of their racial or national connections" and declared oppression of any minority group or race "to be contrary to the fundamental laws of the Republic." The 1918 constitution also established the right to vote and be elected to soviets for both men and women "irrespective of religion, nationality, domicile, etc. [...] who shall have completed their eighteenth year by the day of the election." The later constitutions of the USSR would grant universal Soviet citizenship to the citizens of all member republics in concord with the principles of non-discrimination laid out in the original 1918 constitution of Russia.

Nazi Germany

Nazism, the German variant of twentieth-century fascism, classified inhabitants of the country into three main hierarchical categories, each of which would have different rights in relation to the state: citizens, subjects, and aliens. The first category, citizens, were to possess full civic rights and responsibilities. Citizenship was conferred only on males of German (or so-called "Aryan") heritage who had completed military service, and could be revoked at any time by the state. The Reich Citizenship Law of 1935 established racial criteria for citizenship in the German Reich, and because of this law Jews and others who could not "prove German racial heritage" were stripped of their citizenship.

The second category, subjects, referred to all others who were born within the nation's boundaries who did not fit the racial criteria for citizenship. Subjects would have no voting rights, could not hold any position within the state, and possessed none of the other rights and civic responsibilities conferred on citizens. All women were to be conferred "subject" status upon birth, and could only obtain "citizen" status if they worked independently or if they married a German citizen (see women in Nazi Germany).

The final category, aliens, referred to those who were citizens of another state, who also had no rights.

In 2021, the German government passed Article 116 (2) of the Basic Law, which entitles the restoration of citizenship to individuals who had their German citizenship revoked "on political, racial, or religious grounds" between 30 January 1933 and 8 May 1945. This also entitles their descendants to German citizenship.

Israel

The primary principles of Israeli citizenship is jus sanguinis (citizenship by descent) for Jews and jus soli (citizenship by place of birth) for others.

Different senses

Many theorists suggest that there are two opposing conceptions of citizenship: an economic one, and a political one. For further information, see History of citizenship. Citizenship status, under social contract theory, carries with it both rights and duties. In this sense, citizenship was described as "a bundle of rights -- primarily, political participation in the life of the community, the right to vote, and the right to receive certain protection from the community, as well as obligations." Citizenship is seen by most scholars as culture-specific, in the sense that the meaning of the term varies considerably from culture to culture, and over time. In China, for example, there is a cultural politics of citizenship which could be called "peopleship", argued by an academic article.

How citizenship is understood depends on the person making the determination. The relation of citizenship has never been fixed or static, but constantly changes within each society. While citizenship has varied considerably throughout history, and within societies over time, there are some common elements but they vary considerably as well. As a bond, citizenship extends beyond basic kinship ties to unite people of different genetic backgrounds. It usually signifies membership in a political body. It is often based on or was a result of, some form of military service or expectation of future service. It usually involves some form of political participation, but this can vary from token acts to active service in government.

Citizenship is a status in society. It is an ideal state as well. It generally describes a person with legal rights within a given political order. It almost always has an element of exclusion, meaning that some people are not citizens and that this distinction can sometimes be very important, or not important, depending on a particular society. Citizenship as a concept is generally hard to isolate intellectually and compare with related political notions since it relates to many other aspects of society such as the family, military service, the individual, freedom, religion, ideas of right, and wrong, ethnicity, and patterns for how a person should behave in society. When there are many different groups within a nation, citizenship may be the only real bond that unites everybody as equals without discrimination—it is a "broad bond" linking "a person with the state" and gives people a universal identity as a legal member of a specific nation.

Modern citizenship has often been looked at as two competing underlying ideas:

  • The liberal-individualist or sometimes liberal conception of citizenship suggests that citizens should have entitlements necessary for human dignity. It assumes people act for the purpose of enlightened self-interest. According to this viewpoint, citizens are sovereign, morally autonomous beings with duties to pay taxes, obey the law, engage in business transactions, and defend the nation if it comes under attack, but are essentially passive politically, and their primary focus is on economic betterment. This idea began to appear around the seventeenth and eighteenth centuries and became stronger over time, according to one view. According to this formulation, the state exists for the benefit of citizens and has an obligation to respect and protect the rights of citizens, including civil rights and political rights. It was later that so-called social rights became part of the obligation for the state.
  • The civic-republican or sometimes classical or civic humanist conception of citizenship emphasizes man's political nature and sees citizenship as an active process, not a passive state or legal marker. It is relatively more concerned that government will interfere with popular places to practice citizenship in the public sphere. Citizenship means being active in government affairs. According to one view, most people today live as citizens according to the liberal-individualist conception but wished they lived more according to the civic-republican ideal. An ideal citizen is one who exhibits "good civic behavior". Free citizens and a republic government are "mutually interrelated." Citizenship suggested a commitment to "duty and civic virtue".

Responsibilities of citizens

Responsibility is an action that individuals of a state or country must take note of in the interest of a common good. These responsibilities can be categorised into personal and civic responsibilities.

Scholars suggest that the concept of citizenship contains many unresolved issues, sometimes called tensions, existing within the relation, that continue to reflect uncertainty about what citizenship is supposed to mean. Some unresolved issues regarding citizenship include questions about what is the proper balance between duties and rights. Another is a question about what is the proper balance between political citizenship versus social citizenship. Some thinkers see benefits with people being absent from public affairs, since too much participation such as revolution can be destructive, yet too little participation such as total apathy can be problematic as well. Citizenship can be seen as a special elite status, and it can also be seen as a democratizing force and something that everybody has; the concept can include both senses. According to sociologist Arthur Stinchcombe, citizenship is based on the extent that a person can control one's own destiny within the group in the sense of being able to influence the government of the group. One last distinction within citizenship is the so-called consent descent distinction, and this issue addresses whether citizenship is a fundamental matter determined by a person choosing to belong to a particular nation––by their consent––or is citizenship a matter of where a person was born––that is, by their descent.

International

Some intergovernmental organizations have extended the concept and terminology associated with citizenship to the international level, where it is applied to the totality of the citizens of their constituent countries combined. Citizenship at this level is a secondary concept, with rights deriving from national citizenship.

European Union

The Maastricht Treaty introduced the concept of citizenship of the European Union. Article 17 (1) of the Treaty on European Union stated that:

Citizenship of the Union is hereby established. Every person holding the nationality of a Member State shall be a citizen of the Union. Citizenship of the Union shall be additional to and not replace national citizenship.

An agreement is known as the amended EC Treaty established certain minimal rights for European Union citizens. Article 12 of the amended EC Treaty guaranteed a general right of non-discrimination within the scope of the Treaty. Article 18 provided a limited right to free movement and residence in the Member States other than that of which the European Union citizen is a national. Articles 18-21 and 225 provide certain political rights.

Union citizens have also extensive rights to move in order to exercise economic activity in any of the Member States which predate the introduction of Union citizenship.

Mercosur

Citizenship of the Mercosur is granted to eligible citizens of the Southern Common Market member states. It was approved in 2010 through the Citizenship Statute and should be fully implemented by the member countries in 2021 when the program will be transformed in an international treaty incorporated into the national legal system of the countries, under the concept of "Mercosur Citizen".

Commonwealth

Citizenship ceremony on beach near Cooktown, Queensland. 2012

The concept of "Commonwealth Citizenship" has been in place ever since the establishment of the Commonwealth of Nations. As with the EU, one holds Commonwealth citizenship only by being a citizen of a Commonwealth member state. This form of citizenship offers certain privileges within some Commonwealth countries:

  • Some such countries do not require tourist visas of citizens of other Commonwealth countries or allow some Commonwealth citizens to stay in the country for tourism purposes without a visa for longer than citizens of other countries.
  • In some Commonwealth countries, resident citizens of other Commonwealth countries are entitled to political rights, e.g., the right to vote in local and national elections and in some cases even the right to stand for election.
  • In some instances the right to work in any position (including the civil service) is granted, except for certain specific positions, such as in the defense departments, Governor-General or President or Prime Minister.
  • In the United Kingdom, all Commonwealth citizens legally residing in the country can vote and stand for office at all elections.

Although Ireland was excluded from the Commonwealth in 1949 because it declared itself a republic, Ireland is generally treated as if it were still a member. Legislation often specifically provides for equal treatment between Commonwealth countries and Ireland and refers to "Commonwealth countries and Ireland". Ireland's citizens are not classified as foreign nationals in the United Kingdom.

Canada departed from the principle of nationality being defined in terms of allegiance in 1921. In 1935 the Irish Free State was the first to introduce its own citizenship. However, Irish citizens were still treated as subjects of the Crown, and they are still not regarded as foreign, even though Ireland is not a member of the Commonwealth. The Canadian Citizenship Act of 1946 provided for a distinct Canadian Citizenship, automatically conferred upon most individuals born in Canada, with some exceptions, and defined the conditions under which one could become a naturalized citizen. The concept of Commonwealth citizenship was introduced in 1948 in the British Nationality Act 1948. Other dominions adopted this principle such as New Zealand, by way of the British Nationality and New Zealand Citizenship Act 1948.

Subnational

Diagram of relationship between; Citizens, Politicians + Laws

Citizenship most usually relates to membership of the nation-state, but the term can also apply at the subnational level. Subnational entities may impose requirements, of residency or otherwise, which permit citizens to participate in the political life of that entity or to enjoy benefits provided by the government of that entity. But in such cases, those eligible are also sometimes seen as "citizens" of the relevant state, province, or region. An example of this is how the fundamental basis of Swiss citizenship is a citizenship of an individual commune, from which follows citizenship of a canton and of the Confederation. Another example is Åland where the residents enjoy special provincial citizenship within Finland, hembygdsrätt.

The United States has a federal system in which a person is a citizen of their specific state of residence, such as New York or California, as well as a citizen of the United States. State constitutions may grant certain rights above and beyond what is granted under the United States Constitution and may impose their own obligations including the sovereign right of taxation and military service; each state maintains at least one military force subject to national militia transfer service, the state's national guard, and some states maintain a second military force not subject to nationalization.

Education

"Active citizenship" is the philosophy that citizens should work towards the betterment of their community through economic participation, public, volunteer work, and other such efforts to improve life for all citizens. In this vein, citizenship education is taught in schools, as an academic subject in some countries. By the time children reach secondary education there is an emphasis on such unconventional subjects to be included in an academic curriculum. While the diagram on citizenship to the right is rather facile and depthless, it is simplified to explain the general model of citizenship that is taught to many secondary school pupils. The idea behind this model within education is to instill in young pupils that their actions (i.e. their vote) affect collective citizenship and thus in turn them.

Republic of Ireland

It is taught in the Republic of Ireland as an exam subject for the Junior Certificate. It is known as Civic, Social and Political Education (CSPE). A new Leaving Certificate exam subject with the working title 'Politics & Society' is being developed by the National Council for Curriculum and Assessment (NCCA) and is expected to be introduced to the curriculum sometime after 2012.

United Kingdom

Citizenship is offered as a General Certificate of Secondary Education (GCSE) course in many schools in the United Kingdom. As well as teaching knowledge about democracy, parliament, government, the justice system, human rights and the UK's relations with the wider world, students participate in active citizenship, often involving a social action or social enterprise in their local community.

  • Citizenship is a compulsory subject of the National Curriculum in state schools in England for all pupils aged 11–16. Some schools offer a qualification in this subject at GCSE and A level. All state schools have a statutory requirement to teach the subject, assess pupil attainment and report student's progress in citizenship to parents.
  • In Wales the model used is personal and social education.
  • Citizenship is not taught as a discrete subject in Scottish schools, but is a cross-curricular strand of the Curriculum for Excellence. However they do teach a subject called "Modern Studies" which covers the social, political and economic study of local, national and international issues.
  • Citizenship is taught as a standalone subject in all state schools in Northern Ireland and most other schools in some forms from year 8 to 10 prior to GCSEs. Components of Citizenship are then also incorporated into GCSE courses such as 'Learning for Life and Work'.

Criticism

The concept of citizenship is criticized by open borders advocates, who argue that it functions as a caste, feudal, or apartheid system in which people are assigned dramatically different opportunities based on the accident of birth. It is also criticized by some libertarians, especially anarcho-capitalists. In 1987, moral philosopher Joseph Carens argued that "citizenship in Western liberal democracies is the modern equivalent of feudal privilege—an inherited status that greatly enhances one's life chances. Like feudal birthright privileges, restrictive citizenship is hard to justify when one thinks about it closely".

Knowledge-based engineering

From Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/Knowledge-based_engineering

Knowledge-based engineering (KBE) is the application of knowledge-based systems technology to the domain of manufacturing design and production. The design process is inherently a knowledge-intensive activity, so a great deal of the emphasis for KBE is on the use of knowledge-based technology to support computer-aided design (CAD) however knowledge-based techniques (e.g. knowledge management) can be applied to the entire product lifecycle.

The CAD domain has always been an early adopter of software-engineering techniques used in knowledge-based systems, such as object-orientation and rules. Knowledge-based engineering integrates these technologies with CAD and other traditional engineering software tools.

Benefits of KBE include improved collaboration of the design team due to knowledge management, improved re-use of design artifacts, and automation of major parts of the product lifecycle.

Overview

KBE is essentially engineering on the basis of knowledge models. A knowledge model uses knowledge representation to represent the artifacts of the design process (as well as the process itself) rather than or in addition to conventional programming and database techniques.

The advantages to using knowledge representation to model industrial engineering tasks and artifacts are:

  • Improved integration. In traditional CAD and industrial systems each application often has its own slightly different model. Having a standardized knowledge model makes integration easier across different systems and applications.
  • More re-use. A knowledge model facilitates storing and tagging design artifacts so that they can easily be found again and re-used. Also, knowledge models are themselves more re-usable by virtue of using formalism such as IS-A relations (classes and subclasses in the object-oriented paradigm). With subclassing it can be very easy to create new types of artifacts and processes by starting with an existing class and adding a new subclass that inherits all the default properties and behaviors of its parents and then can be adapted as needed.
  • Better maintenance. Class hierarchies not only facilitate re-use they also facilitate maintenance of systems. By having one definition of a class that is shared by multiple systems, issues of change control and consistency are greatly simplified.
  • More automation. Expert system rules can capture and automate decision making that is left to human experts with most conventional systems.

KBE can have a wide scope that covers the full range of activities related to Product Lifecycle Management and Multidisciplinary design optimization. KBE's scope includes design, analysis (computer-aided engineering – CAE), manufacturing, and support. In this inclusive role, KBE has to cover a large multi-disciplinary role related to many computer-aided technologies (CAx).

There are two primary ways that KBE can be implemented:

  1. Build knowledge models from the ground up using knowledge-based technology
  2. Layer knowledge-based technology on top of existing CAD, simulation, and other engineering applications

An early example of the first approach was the Simkit tool developed by Intellicorp in the 1980s. Simkit was developed on top of Intellicorp's Knowledge Engineering Environment (KEE). KEE was a very powerful knowledge-based systems development environment. KEE started on Lisp and added frames, objects, and rules, as well as powerful additional tools, such as hypothetical reasoning and truth maintenance. Simkit added stochastic simulation capabilities to the KEE environment. These capabilities included an event model, random distribution generators, simulation visualization, and more. The Simkit tool was an early example of KBE. It could define a simulation in terms of class models and rules and then run the simulation as a conventional simulation would. Along the way, the simulation could continue to invoke rules, demons, and object methods, providing the potential for much richer simulation as well as analysis than conventional simulation tools.

One of the issues that Simkit faced was a common issue for most early KBE systems developed with this method: The Lisp knowledge-based environments provide very powerful knowledge representation and reasoning capabilities; however, they did so at the cost of massive requirements for memory and processing that stretched the limits of the computers of the time. Simkit could run simulations with thousands of objects and do very sophisticated analysis on those objects. However, industrial simulations often required tens or hundreds of thousands of objects, and Simkit had difficulty scaling up to such levels.

The second alternative to developing KBE is illustrated by the CATIA product suite. CATIA started with products for CAD and other traditional industrial engineering applications and added knowledge-based capabilities on to them; for example, their KnowledgeWare module.

History

KBE developed in the 1980s. It was part of the initial wave of investment in Artificial Intelligence for business that fueled expert systems. Like expert systems, it relied on what at the time were leading edge advances in corporate information technology such as PCs, workstations, and client-server architectures. These same technologies were also facilitating the growth of CAx and CAD software. CAD tended to drive leading edge technologies and even push them past their current limits.[5] The best example of this was object-oriented programming and database technology, which were adapted by CAD when most corporate information technology shops were dominated by relational databases and procedural programming.

As with expert systems, KBE suffered a downturn during the AI Winter. Also, as with expert systems and artificial intelligence technology in general, there was renewed interest with the Internet. In the case of KBE, the interest was perhaps strongest in the business-to-business type of electronic commerce and technologies that facilitate the definition of industry standard vocabularies and ontologies for manufactured products.

The semantic web is the vision of Tim Berners Lee for the next generation of the Internet. This will be a knowledge-based Internet built on ontologies, objects, and frame technologies that were also enabling technologies for KBE. Important technologies for the semantic web are XML, RDF, and OWL. The semantic web has excellent potential for KBE, and KBE ontologies and projects are a strong area for current research.

KBE and product lifecycle management

Product Lifecycle Management (PLM) is the management of the manufacturing process of any industry that produces goods. It can span the full product lifecycle from idea generation to implementation, delivery, and disposal. KBE at this level will deal with product issues of a more generic nature than it will with CAx. A natural area of emphasis is on the production process; however, lifecycle management can cover many more issues such as business planning, marketing, etc. An advantage of using KBE is getting the automated reasoning and knowledge management services of a knowledge-based environment integrated with the many diverse but related needs of lifecycle management. KBE supports the decision processes involved with configuration, trades, control, management, and a number of other areas, such as optimization.

KBE and CAx

CAx refers to the domain of computer-aided tools for analysis and design. CAx spans multiple domains. Examples are computer-aided design of manufactured parts, software, the architecture of buildings, etc. Although each specific domain of CAx will have very different kinds of problems and artifacts, they all share common issues as well such as having to manage collaboration of sophisticated knowledge workers, design and re-use of complex artifacts, etc.

Essentially KBE extends, builds on, and integrates with the CAx domain typically referred to as Computer Aided Design (CAD). In this sense KBE is analogous to Knowledge-Based Software Engineering, which extended the domain of Computer Aided Software Engineering with knowledge-based tools and technology. What KBSE was to software and CASE, KBE is to manufactured products and CAD.

An example can be taken from Boeing's experience. The 777 Program took on the challenge of having a digitally-defined plane. That required an investment in large-scale systems, databases, and workstations for design and analytical engineering work. Given the magnitude of the computing work that was required, KBE got its toe in the door, so to speak, through a "pay as you go plan." Essentially, this technique was to show benefits and then to obtain more work (think agile engineering) thereby. In the case of the 777, the project got to where influences to changes in the early part of the design/build stream (loads) could be recomputed over a weekend to allow evaluation by downstream processes. As required, engineers were in the loop to finish and sign off on work. At the same time, CAx allowed tighter tolerances to be met. With the 777, KBE was so successful that subsequent programs applied it in more areas. Over time, KBE facilities were integrated into the CAx platform and are a normal part of the operation.

KBE and knowledge management

One of the most important knowledge-based technologies for KBE is knowledge management. Knowledge management tools support a wide spectrum repository, i.e., a repository that can support all different types of work artifacts: informal drawings and notes, large database tables, multimedia and hypertext objects, etc. Knowledge management provides the various group support tools to help diverse stake holders collaborate on the design and implementation of products. It also provides tools to automate the design process (e.g., rules) and to facilitate re-use.

KBE methodology

The development of KBE applications concerns the requirements to identify, capture, structure, formalize, and finally implement knowledge. Many different so-called KBE platforms support only the implementation step, which is not always the main bottleneck in the KBE development process. In order to limit the risk associated with the development and maintenance of KBE application, there is a need to rely on an appropriate methodology for managing the knowledge and maintaining it up to date. As example of such KBE methodology, the EU project MOKA, "Methodology and tools Oriented to Knowledge based Applications," proposes solutions which focus on the structuring and formalization steps as well as links to the implementation.

An alternative to MOKA is to use general knowledge engineering methods that have been developed for expert systems across all industries  or to use general software development methodologies such as the Rational Unified Process or Agile methods.

Languages for KBE

Two critical issues for the languages and formalisms used for KBE are:

  • Knowledge-based vs. procedural programming
  • Standardization vs. proprietary

Knowledge-based vs. procedural programming

A fundamental trade-off identified with knowledge representation in artificial intelligence is between expressive power and computability. As Levesque demonstrated in his classic paper on the topic, the more powerful a knowledge-representation formalism one designs, the closer the formalism will come to the expressive power of first order logic. As Levesque also demonstrated, the closer a language is to First Order Logic, the more probable that it will allow expressions that are undecidable or require exponential processing power to complete. In the implementation of KBE systems, this trade off is reflected in the choice to use powerful knowledge-based environments or more conventional procedural and object-oriented programming environments.

Standardization vs. proprietary

There is a trade off between using standards such as STEM and vendor- or business-specific proprietary languages. Standardization facilitates knowledge sharing, integration, and re-use. Proprietary formats (such as CATIA) can provide competitive advantage and powerful features beyond current standardization.

Genworks GDL, a commercial product whose core is based on the AGPL-licensed Gendl Project, addresses the issue of application longevity by providing a high-level declarative language kernel which is a superset of a standard dialect of the Lisp programming language (ANSI Common Lisp, or CL). Gendl/GDL itself is proposed as a de facto standard for ANSI CL-based KBE languages.

In 2006, the Object Management Group released a KBE services RFP document and requested feedback. To date, no OMG specification for KBE exists; however, there is an OMG standard for CAD services.

An example of a system-independent language for the development of machine-readable ontologies that is in the KBE domain is Gellish English.

Linguistics

From Wikipedia, the free encyclopedia
 
Linguistics is the scientific study of language. Linguistics is based on a theoretical as well as a descriptive study of language and is also interlinked with the applied fields of language studies and language learning, which entails the study of specific languages. Before the 20th century, linguistics evolved in conjunction with literary study and did not exclusively employ scientific methods.

Traditional areas of linguistic analysis correspond to syntax (rules governing the structure of sentences), semantics (meaning), morphology (structure of words), phonetics (speech sounds and equivalent gestures in sign languages), phonology (the abstract sound system of a particular language), and pragmatics (how social context contributes to meaning). Subdisciplines such as biolinguistics (the study of the biological variables and evolution of language) and psycholinguistics (the study of psychological factors in human language) bridge many of these divisions.

Linguistics encompasses many branches and subfields that span both theoretical and practical applications. Theoretical linguistics (including traditional descriptive linguistics) is concerned with understanding the universal and fundamental nature of language and developing a general theoretical framework for describing it. Applied linguistics seeks to utilise the scientific findings of the study of language for practical purposes, such as developing methods of improving language education and literacy.

Linguistic features may be studied through a variety of perspectives: synchronically (by describing the shifts in a language at a certain specific point of time) or diachronically (through the historical development of language over several periods of time), in monolinguals or in multilinguals, amongst children or amongst adults, in terms of how it is being learned or how it was acquired, as abstract objects or as cognitive structures, through written texts or through oral elicitation, and finally through mechanical data collection or through practical fieldwork.

Linguistics emerged from the field of philology, of which some branches are more qualitative and holistic in approach. Today, philology and linguistics are now variably described as related fields, subdisciplines, or separate fields of language study but, by and large, linguistics can be seen as an umbrella term. Linguistics is also related to the philosophy of language, stylistics, rhetoric, semiotics, lexicography, and translation.

Major subdisciplines

Swiss linguistician Ferdinand de Saussure is regarded as the creator of semiotics

Historical linguistics

Historical linguistics is the study of how language changes in history, particularly with regard to a specific language or a group of languages. Western trends in historical linguistics date back to roughly the late 18th century, when the discipline grew out of philology, the study of ancient texts and oral traditions.

Historical linguistics emerged as one of the first few sub-disciplines in the field, and was most widely practised during the late 19th century. Despite a shift in focus in the 20th century towards formalism and generative grammar, which studies the universal properties of language, historical research today still remains a significant field of linguistic inquiry. Subfields of the discipline include language change and grammaticalisation.

Historical linguistics studies language change either diachronically (through a comparison of different time periods in the past and present) or in a synchronic manner (by observing developments between different variations that exist within the current linguistic stage of a language).

At first, historical linguistics was the cornerstone of comparative linguistics, which involves a study of the relationship between different languages. At that time, scholars of historical linguistics were only concerned with creating different categories of language families, and reconstructing prehistoric proto-languages by using both the comparative method and the method of internal reconstruction. Internal reconstruction is the method by which an element that contains a certain meaning is re-used in different contexts or environments where there is a variation in either sound or analogy.

The reason for this had been to describe well-known Indo-European languages, many of which had long written histories. Scholars of historical linguistics also studied Uralic languages, another European language family for which very little written material existed back then. After that, there also followed significant work on the corpora of other languages, such as the Austronesian languages and the Native American language families.

The above approach of comparativism in linguistics is now, however, only a small part of the much broader discipline called historical linguistics. The comparative study of specific Indo-European languages is considered a highly specialised field today, while comparative research is carried out over the subsequent internal developments in a language: in particular, over the development of modern standard varieties of languages, and over the development of a language from its standardized form to its varieties.

For instance, some scholars also tried to establish super-families, linking, for example, Indo-European, Uralic, and other language families to Nostratic. While these attempts are still not widely accepted as credible methods, they provide necessary information to establish relatedness in language change. This is generally hard to find for events long ago, due to the occurrence of chance word resemblances and variations between language groups. A limit of around 10,000 years is often assumed for the functional purpose of conducting research. It is also hard to date various proto-languages. Even though several methods are available, these languages can be dated only approximately.

Today, with a subsequent re-development of grammatical studies, historical linguistics studies the change in language on a relational basis between dialect to dialect during one period, as well as between those in the past and the present period, and looks at morphological, syntactical, and phonetical evolution and shifts.

Syntax and morphology

Major levels of linguistic structure

Syntax and morphology are branches of linguistics concerned with the order and structure of meaningful linguistic units such as words and morphemes. Syntacticians study the rules and constraints that govern how speakers of a language can organize words into sentences. Morphologists study similar rules for the order of morphemes—sub-word units such as prefixes and suffixes—and how they may be combined to form words.

Words, along with clitics, are generally accepted as being the smallest units of syntax. But in most languages, if not all, many words can be related to other words by rules that collectively describe the grammar for that language. For example, English speakers recognize that the words dog and dogs are closely related, differentiated only by the plurality morpheme "-s", only found bound to noun phrases. Speakers of English recognize these relations from their innate knowledge of the English language's rules of word formation. They infer intuitively that dog is to dogs as cat is to cats; and, in similar fashion, dog is to dog catcher as dish is to dishwasher. By contrast, Classical Chinese has very little morphology, using almost exclusively unbound morphemes ("free" morphemes) and depending on word order to convey meaning. (Most words in modern Standard Chinese ["Mandarin"], however, are compounds and most roots are bound.) These are understood as grammars that represent the morphology of the language. The rules understood by a speaker reflect specific patterns or regularities in the way words are formed from smaller units in the language they are using, and how those smaller units interact in speech. In this way, morphology is the branch of linguistics that studies patterns of word formation within and across languages and attempts to formulate rules that model the knowledge of the speakers of those languages.

Changes in sound and spelling between a base word and its origin may be partial to literacy skills. Studies show that the presence of modification in phonology and orthography makes morphologically complex words harder to understand and that the absence of modification between a base word and its origin makes morphologically complex words easier to understand. Morphologically complex words are easier to comprehend when they include a base word.

Polysynthetic languages, such as Chukchi, have words composed of many morphemes. The Chukchi word "təmeyŋəlevtpəγtərkən", for example, meaning "I have a fierce headache", is composed of eight morphemes t-ə-meyŋ-ə-levt-pəγt-ə-rkən that may be glossed. The morphology of such languages allows for each consonant and vowel to be understood as morphemes, while the grammar of the language indicates the usage and understanding of each morpheme.

The discipline that deals specifically with the sound changes occurring within morphemes is morphophonology.

Semantics and pragmatics

Semantics and pragmatics are branches of linguistics concerned with meaning. These subfields have traditionally been divided according to aspects of meaning: "semantics" refers to grammatical and lexical meanings, while "pragmatics" is concerned with meaning in context. The framework of formal semantics studies the denotations of sentences and how they are composed from the meanings of their constituent expressions. Formal semantics draws heavily on philosophy of language and uses formal tools from logic and computer science. Cognitive semantics ties linguistic meaning to general aspects of cognition, drawing on ideas from cognitive science such as prototype theory.

Pragmatics includes features like speech acts, implicature, and talk in interaction. Unlike semantics, which examines meaning that is conventional or "coded" in a given language, pragmatics studies how the transmission of meaning depends not only on the structural and linguistic knowledge (grammar, lexicon, etc.) of the speaker and listener, but also on the context of the utterance, any pre-existing knowledge about those involved, the inferred intent of the speaker, and other factors. In that respect, pragmatics explains how language users can overcome apparent ambiguity since meaning relies on the manner, place, time, etc. of an utterance.

Phonetics and phonology

Phonetics and phonology are branches of linguistics concerned with sounds (or the equivalent aspects of sign languages). Phonetics is largely concerned with the physical aspects of sounds such as their articulation, acoustics, production, and perception. Phonology is concerned with the linguistic abstractions and categorizations of sounds, and it tells us what sounds are in a language, how they do and can combine into words, and explains why certain phonetic features are important to identifying a word.

Typology

Linguistic typology (or language typology) is a field of linguistics that studies and classifies languages according to their structural features to allow their comparison. Its aim is to describe and explain the structural diversity and the common properties of the world's languages. Its subdisciplines include, but are not limited to phonological typology, which deals with sound features; syntactic typology, which deals with word order and form; lexical typology, which deals with language vocabulary; and theoretical typology, which aims to explain the universal tendencies.

Structures

Linguistic structures are pairings of meaning and form. Any particular pairing of meaning and form is a Saussurean linguistic sign. For instance, the meaning "cat" is represented worldwide with a wide variety of different sound patterns (in oral languages), movements of the hands and face (in sign languages), and written symbols (in written languages). Linguistic patterns have proven their importance for the knowledge engineering field especially with the ever-increasing amount of available data.

Linguists focusing on structure attempt to understand the rules regarding language use that native speakers know (not always consciously). All linguistic structures can be broken down into component parts that are combined according to (sub)conscious rules, over multiple levels of analysis. For instance, consider the structure of the word "tenth" on two different levels of analysis. On the level of internal word structure (known as morphology), the word "tenth" is made up of one linguistic form indicating a number and another form indicating ordinality. The rule governing the combination of these forms ensures that the ordinality marker "th" follows the number "ten." On the level of sound structure (known as phonology), structural analysis shows that the "n" sound in "tenth" is made differently from the "n" sound in "ten" spoken alone. Although most speakers of English are consciously aware of the rules governing internal structure of the word pieces of "tenth", they are less often aware of the rule governing its sound structure. Linguists focused on structure find and analyze rules such as these, which govern how native speakers use language.

Grammar

Grammar is a system of rules which governs the production and use of utterances in a given language. These rules apply to sound as well as meaning, and include componential subsets of rules, such as those pertaining to phonology (the organisation of phonetic sound systems), morphology (the formation and composition of words), and syntax (the formation and composition of phrases and sentences). Modern frameworks that deal with the principles of grammar include structural and functional linguistics, and generative linguistics.

Sub-fields that focus on a grammatical study of language include the following:

  • Phonetics, the study of the physical properties of speech sound production and perception, and delves into their acoustic and articulatory properties
  • Phonology, the study of sounds as abstract elements in the speaker's mind that distinguish meaning (phonemes)
  • Morphology, the study of morphemes, or the internal structures of words and how they can be modified
  • Syntax, the study of how words combine to form grammatical phrases and sentences
  • Semantics, the study of lexical and grammatical aspects of meaning
  • Pragmatics, the study of how utterances are used in communicative acts, and the role played by situational context and non-linguistic knowledge in the transmission of meaning
  • Discourse analysis, the analysis of language use in texts (spoken, written, or signed)
  • Stylistics, the study of linguistic factors (rhetoric, diction, stress) that place a discourse in context
  • Semiotics, the study of signs and sign processes (semiosis), indication, designation, likeness, analogy, metaphor, symbolism, signification, and communication

Discourse

Discourse is language as social practice (Baynham, 1995) and is a multilayered concept. As a social practice, discourse embodies different ideologies through written and spoken texts. Discourse analysis can examine or expose these ideologies. Discourse influences genre, which is chosen in response to different situations and finally, at micro level, discourse influences language as text (spoken or written) at the phonological or lexico-grammatical level. Grammar and discourse are linked as parts of a system. A particular discourse becomes a language variety when it is used in this way for a particular purpose, and is referred to as a register. There may be certain lexical additions (new words) that are brought into play because of the expertise of the community of people within a certain domain of specialization. Registers and discourses therefore differentiate themselves through the use of vocabulary, and at times through the use of style too. People in the medical fraternity, for example, may use some medical terminology in their communication that is specialized to the field of medicine. This is often referred to as being part of the "medical discourse", and so on.

Lexicon

The lexicon is a catalogue of words and terms that are stored in a speaker's mind. The lexicon consists of words and bound morphemes, which are parts of words that can not stand alone, like affixes. In some analyses, compound words and certain classes of idiomatic expressions and other collocations are also considered to be part of the lexicon. Dictionaries represent attempts at listing, in alphabetical order, the lexicon of a given language; usually, however, bound morphemes are not included. Lexicography, closely linked with the domain of semantics, is the science of mapping the words into an encyclopedia or a dictionary. The creation and addition of new words (into the lexicon) is called coining or neologization, and the new words are called neologisms.

It is often believed that a speaker's capacity for language lies in the quantity of words stored in the lexicon. However, this is often considered a myth by linguists. The capacity for the use of language is considered by many linguists to lie primarily in the domain of grammar, and to be linked with competence, rather than with the growth of vocabulary. Even a very small lexicon is theoretically capable of producing an infinite number of sentences.

Style

Stylistics also involves the study of written, signed, or spoken discourse through varying speech communities, genres, and editorial or narrative formats in the mass media. It involves the study and interpretation of texts for aspects of their linguistic and tonal style. Stylistic analysis entails the analysis of description of particular dialects and registers used by speech communities. Stylistic features include rhetoric, diction, stress, satire, irony, dialogue, and other forms of phonetic variations. Stylistic analysis can also include the study of language in canonical works of literature, popular fiction, news, advertisements, and other forms of communication in popular culture as well. It is usually seen as a variation in communication that changes from speaker to speaker and community to community. In short, Stylistics is the interpretation of text.

In the 1960s, Jacques Derrida, for instance, further distinguished between speech and writing, by proposing that written language be studied as a linguistic medium of communication in itself. Palaeography is therefore the discipline that studies the evolution of written scripts (as signs and symbols) in language. The formal study of language also led to the growth of fields like psycholinguistics, which explores the representation and function of language in the mind; neurolinguistics, which studies language processing in the brain; biolinguistics, which studies the biology and evolution of language; and language acquisition, which investigates how children and adults acquire the knowledge of one or more languages.

Approaches

Humanistic

The fundamental principle of humanistic linguistics, especially rational and logical grammar, is that language is an invention created by people. A semiotic tradition of linguistic research considers language a sign system which arises from the interaction of meaning and form. The organisation of linguistic levels is considered computational. Linguistics is essentially seen as relating to social and cultural studies because different languages are shaped in social interaction by the speech community. Frameworks representing the humanistic view of language include structural linguistics, among others.

Structural analysis means dissecting each linguistic level: phonetic, morphological, syntactic, and discourse, to the smallest units. These are collected into inventories (e.g. phoneme, morpheme, lexical classes, phrase types) to study their interconnectedness within a hierarchy of structures and layers. Functional analysis adds to structural analysis the assignment of semantic and other functional roles that each unit may have. For example, a noun phrase may function as the subject or object of the sentence; or the agent or patient.

Functional linguistics, or functional grammar, is a branch of structural linguistics. In the humanistic reference, the terms structuralism and functionalism are related to their meaning in other human sciences. The difference between formal and functional structuralism lies in the way that the two approaches explain why languages have the properties they have. Functional explanation entails the idea that language is a tool for communication, or that communication is the primary function of language. Linguistic forms are consequently explained by an appeal to their functional value, or usefulness. Other structuralist approaches take the perspective that form follows from the inner mechanisms of the bilateral and multilayered language system.

Biological

Approaches such as cognitive linguistics and generative grammar study linguistic cognition with a view towards uncovering the biological underpinnings of language. In Generative Grammar, these underpinning are understood as including innate domain-specific grammatical knowledge. Thus, one of the central concerns of the approach is to discover what aspects of linguistic knowledge are innate and which are not.

Cognitive linguistics, in contrast, rejects the notion of innate grammar, and studies how the human mind creates linguistic constructions from event schemas, and the impact of cognitive constraints and biases on human language. In cognitive linguistics, language is approached via the senses.

A closely related approach is evolutionary linguistics which includes the study of linguistic units as cultural replicators. It is possible to study how language replicates and adapts to the mind of the individual or the speech community. Construction grammar is a framework which applies the meme concept to the study of syntax.

The generative versus evolutionary approach are sometimes called formalism and functionalism, respectively. This reference is however different from the use of the terms in human sciences.

Methodology

Modern linguistics is primarily descriptive. Linguists describe and explain features of language without making subjective judgments on whether a particular feature or usage is "good" or "bad". This is analogous to practice in other sciences: a zoologist studies the animal kingdom without making subjective judgments on whether a particular species is "better" or "worse" than another.

Prescription, on the other hand, is an attempt to promote particular linguistic usages over others, often favouring a particular dialect or "acrolect". This may have the aim of establishing a linguistic standard, which can aid communication over large geographical areas. It may also, however, be an attempt by speakers of one language or dialect to exert influence over speakers of other languages or dialects (see Linguistic imperialism). An extreme version of prescriptivism can be found among censors, who attempt to eradicate words and structures that they consider to be destructive to society. Prescription, however, may be practised appropriately in language instruction, like in ELT, where certain fundamental grammatical rules and lexical items need to be introduced to a second-language speaker who is attempting to acquire the language.

Sources

Most contemporary linguists work under the assumption that spoken data and signed data are more fundamental than written data. This is because

  • Speech appears to be universal to all human beings capable of producing and perceiving it, while there have been many cultures and speech communities that lack written communication;
  • Features appear in speech which are not always recorded in writing, including phonological rules, sound changes, and speech errors;
  • All natural writing systems reflect a spoken language (or potentially a signed one), even with pictographic scripts like Dongba writing Naxi homophones with the same pictogram, and text in writing systems used for two languages changing to fit the spoken language being recorded;
  • Speech evolved before human beings invented writing;
  • Individuals learn to speak and process spoken language more easily and earlier than they do with writing.

Nonetheless, linguists agree that the study of written language can be worthwhile and valuable. For research that relies on corpus linguistics and computational linguistics, written language is often much more convenient for processing large amounts of linguistic data. Large corpora of spoken language are difficult to create and hard to find, and are typically transcribed and written. In addition, linguists have turned to text-based discourse occurring in various formats of computer-mediated communication as a viable site for linguistic inquiry.

The study of writing systems themselves, graphemics, is, in any case, considered a branch of linguistics.

Analysis

Before the 20th century, linguists analysed language on a diachronic plane, which was historical in focus. This meant that they would compare linguistic features and try to analyse language from the point of view of how it had changed between then and later. However, with the rise of Saussurean linguistics in the 20th century, the focus shifted to a more synchronic approach, where the study was geared towards analysis and comparison between different language variations, which existed at the same given point of time.

At another level, the syntagmatic plane of linguistic analysis entails the comparison between the way words are sequenced, within the syntax of a sentence. For example, the article "the" is followed by a noun, because of the syntagmatic relation between the words. The paradigmatic plane, on the other hand, focuses on an analysis that is based on the paradigms or concepts that are embedded in a given text. In this case, words of the same type or class may be replaced in the text with each other to achieve the same conceptual understanding.

History

The earliest activities in the description of language have been attributed to the 6th-century-BC Indian grammarian Pāṇini who wrote a formal description of the Sanskrit language in his Aṣṭādhyāyī.Today, modern-day theories on grammar employ many of the principles that were laid down then.

Nomenclature

Before the 20th century, the term philology, first attested in 1716, was commonly used to refer to the study of language, which was then predominantly historical in focus. Since Ferdinand de Saussure's insistence on the importance of synchronic analysis, however, this focus has shifted and the term philology is now generally used for the "study of a language's grammar, history, and literary tradition", especially in the United States (where philology has never been very popularly considered as the "science of language").

Although the term linguist in the sense of "a student of language" dates from 1641, the term linguistics is first attested in 1847. It is now the usual term in English for the scientific study of language, though linguistic science is sometimes used.

Linguistics is a multi-disciplinary field of research that combines tools from natural sciences, social sciences, formal sciences, and the humanities. Many linguists, such as David Crystal, conceptualize the field as being primarily scientific. The term linguist applies to someone who studies language or is a researcher within the field, or to someone who uses the tools of the discipline to describe and analyse specific languages.

Early grammarians

An early formal study of language was in India with Pāṇini, the 6th century BC grammarian who formulated 3,959 rules of Sanskrit morphology. Pāṇini's systematic classification of the sounds of Sanskrit into consonants and vowels, and word classes, such as nouns and verbs, was the first known instance of its kind. In the Middle East, Sibawayh, a Persian, made a detailed description of Arabic in AD 760 in his monumental work, Al-kitab fii an-naħw (الكتاب في النحو, The Book on Grammar), the first known author to distinguish between sounds and phonemes (sounds as units of a linguistic system). Western interest in the study of languages began somewhat later than in the East, but the grammarians of the classical languages did not use the same methods or reach the same conclusions as their contemporaries in the Indic world. Early interest in language in the West was a part of philosophy, not of grammatical description. The first insights into semantic theory were made by Plato in his Cratylus dialogue, where he argues that words denote concepts that are eternal and exist in the world of ideas. This work is the first to use the word etymology to describe the history of a word's meaning. Around 280 BC, one of Alexander the Great's successors founded a university (see Musaeum) in Alexandria, where a school of philologists studied the ancient texts in Greek, and taught Greek to speakers of other languages. While this school was the first to use the word "grammar" in its modern sense, Plato had used the word in its original meaning as "téchnē grammatikḗ" (Τέχνη Γραμματική), the "art of writing", which is also the title of one of the most important works of the Alexandrine school by Dionysius Thrax. Throughout the Middle Ages, the study of language was subsumed under the topic of philology, the study of ancient languages and texts, practised by such educators as Roger Ascham, Wolfgang Ratke, and John Amos Comenius.

Comparative philology

In the 18th century, the first use of the comparative method by William Jones sparked the rise of comparative linguistics. Bloomfield attributes "the first great scientific linguistic work of the world" to Jacob Grimm, who wrote Deutsche Grammatik. It was soon followed by other authors writing similar comparative studies on other language groups of Europe. The study of language was broadened from Indo-European to language in general by Wilhelm von Humboldt, of whom Bloomfield asserts:

This study received its foundation at the hands of the Prussian statesman and scholar Wilhelm von Humboldt (1767–1835), especially in the first volume of his work on Kavi, the literary language of Java, entitled Über die Verschiedenheit des menschlichen Sprachbaues und ihren Einfluß auf die geistige Entwickelung des Menschengeschlechts (On the Variety of the Structure of Human Language and its Influence upon the Mental Development of the Human Race).

20th-century developments

There was a shift of focus from historical and comparative linguistics to synchronic analysis in early 20th century. Structural analysis was improved by Leonard Bloomfield, Louis Hjelmslev; and Zellig Harris who also developed methods of discourse analysis. Functional analysis was developed by the Prague linguistic circle and André Martinet. As sound recording devices became commonplace in the 1960s, dialectal recordings were made and archived, and the audio-lingual method provided a technological solution to foreign language learning. The 1960s also saw a new rise of comparative linguistics: the study of language universals in linguistic typology. Towards the end of the century the field of linguistics became divided into further areas of interest with the advent of language technology and digitalised corpora.

Areas of research

Sociolinguistics

Sociolinguistics is the study of how language is shaped by social factors. This sub-discipline focuses on the synchronic approach of linguistics, and looks at how a language in general, or a set of languages, display variation and varieties at a given point in time. The study of language variation and the different varieties of language through dialects, registers, and idiolects can be tackled through a study of style, as well as through analysis of discourse. Sociolinguists research both style and discourse in language, as well as the theoretical factors that are at play between language and society.

Developmental linguistics

Developmental linguistics is the study of the development of linguistic ability in individuals, particularly the acquisition of language in childhood. Some of the questions that developmental linguistics looks into are how children acquire different languages, how adults can acquire a second language, and what the process of language acquisition is.

Neurolinguistics

Neurolinguistics is the study of the structures in the human brain that underlie grammar and communication. Researchers are drawn to the field from a variety of backgrounds, bringing along a variety of experimental techniques as well as widely varying theoretical perspectives. Much work in neurolinguistics is informed by models in psycholinguistics and theoretical linguistics, and is focused on investigating how the brain can implement the processes that theoretical and psycholinguistics propose are necessary in producing and comprehending language. Neurolinguists study the physiological mechanisms by which the brain processes information related to language, and evaluate linguistic and psycholinguistic theories, using aphasiology, brain imaging, electrophysiology, and computer modelling. Amongst the structures of the brain involved in the mechanisms of neurolinguistics, the cerebellum which contains the highest numbers of neurons has a major role in terms of predictions required to produce language.

Applied linguistics

Linguists are largely concerned with finding and describing the generalities and varieties both within particular languages and among all languages. Applied linguistics takes the results of those findings and "applies" them to other areas. Linguistic research is commonly applied to areas such as language education, lexicography, translation, language planning, which involves governmental policy implementation related to language use, and natural language processing. "Applied linguistics" has been argued to be something of a misnomer. Applied linguists actually focus on making sense of and engineering solutions for real-world linguistic problems, and not literally "applying" existing technical knowledge from linguistics. Moreover, they commonly apply technical knowledge from multiple sources, such as sociology (e.g., conversation analysis) and anthropology. (Constructed language fits under Applied linguistics.)

Today, computers are widely used in many areas of applied linguistics. Speech synthesis and speech recognition use phonetic and phonemic knowledge to provide voice interfaces to computers. Applications of computational linguistics in machine translation, computer-assisted translation, and natural language processing are areas of applied linguistics that have come to the forefront. Their influence has had an effect on theories of syntax and semantics, as modelling syntactic and semantic theories on computers constraints.

Linguistic analysis is a sub-discipline of applied linguistics used by many governments to verify the claimed nationality of people seeking asylum who do not hold the necessary documentation to prove their claim. This often takes the form of an interview by personnel in an immigration department. Depending on the country, this interview is conducted either in the asylum seeker's native language through an interpreter or in an international lingua franca like English. Australia uses the former method, while Germany employs the latter; the Netherlands uses either method depending on the languages involved. Tape recordings of the interview then undergo language analysis, which can be done either by private contractors or within a department of the government. In this analysis, linguistic features of the asylum seeker are used by analysts to make a determination about the speaker's nationality. The reported findings of the linguistic analysis can play a critical role in the government's decision on the refugee status of the asylum seeker.

Language documentation

Language documentation combines anthropological inquiry (into the history and culture of language) with linguistic inquiry, in order to describe languages and their grammars. Lexicography involves the documentation of words that form a vocabulary. Such a documentation of a linguistic vocabulary from a particular language is usually compiled in a dictionary. Computational linguistics is concerned with the statistical or rule-based modeling of natural language from a computational perspective. Specific knowledge of language is applied by speakers during the act of translation and interpretation, as well as in language education – the teaching of a second or foreign language. Policy makers work with governments to implement new plans in education and teaching which are based on linguistic research.

Since the inception of the discipline of linguistics, linguists have been concerned with describing and analysing previously undocumented languages. Starting with Franz Boas in the early 1900s, this became the main focus of American linguistics until the rise of formal linguistics in the mid-20th century. This focus on language documentation was partly motivated by a concern to document the rapidly disappearing languages of indigenous peoples. The ethnographic dimension of the Boasian approach to language description played a role in the development of disciplines such as sociolinguistics, anthropological linguistics, and linguistic anthropology, which investigate the relations between language, culture, and society.

The emphasis on linguistic description and documentation has also gained prominence outside North America, with the documentation of rapidly dying indigenous languages becoming a focus in some university programmes in linguistics. Language description is a work-intensive endeavour, usually requiring years of field work in the language concerned, so as to equip the linguist to write a sufficiently accurate reference grammar. Further, the task of documentation requires the linguist to collect a substantial corpus in the language in question, consisting of texts and recordings, both sound and video, which can be stored in an accessible format within open repositories, and used for further research.

Translation

The sub-field of translation includes the translation of written and spoken texts across media, from digital to print and spoken. To translate literally means to transmute the meaning from one language into another. Translators are often employed by organizations such as travel agencies and governmental embassies to facilitate communication between two speakers who do not know each other's language. Translators are also employed to work within computational linguistics setups like Google Translate, which is an automated program to translate words and phrases between any two or more given languages. Translation is also conducted by publishing houses, which convert works of writing from one language to another in order to reach varied audiences. Cross-national and cross-cultural survey research studies employ translation to collect comparable data among multilingual populations. Academic translators specialize in or are familiar with various other disciplines such as technology, science, law, economics, etc.

Clinical linguistics

Clinical linguistics is the application of linguistic theory to the field of speech-language pathology. Speech language pathologists work on corrective measures to treat communication and swallowing disorders.

Computational linguistics

Computational linguistics is the study of linguistic issues in a way that is "computationally responsible", i.e., taking careful note of computational consideration of algorithmic specification and computational complexity, so that the linguistic theories devised can be shown to exhibit certain desirable computational properties and their implementations. Computational linguists also work on computer language and software development.

Evolutionary linguistics

Evolutionary linguistics is a sociobiological approach to analyzing the emergence of the language faculty through human evolution, and also the application of evolutionary theory to the study of cultural evolution among different languages. It is also a study of the dispersal of various languages across the globe, through movements among ancient communities.

Forensic linguistics

Forensic linguistics is the application of linguistic analysis to forensics. Forensic analysis investigates the style, language, lexical use, and other linguistic and grammatical features used in the legal context to provide evidence in courts of law. Forensic linguists have also used their expertise in the framework of criminal cases.

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