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Abstract syntax tree

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An abstract syntax tree ( AST ) is a data structure used in computer science to represent the structure of a program or code snippet. It is a tree representation of the abstract syntactic structure of text (often source code ) written in a formal language . Each node of the tree denotes a construct occurring in the text. It is sometimes called just a syntax tree .

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76-573: The syntax is "abstract" in the sense that it does not represent every detail appearing in the real syntax, but rather just the structural or content-related details. For instance, grouping parentheses are implicit in the tree structure, so these do not have to be represented as separate nodes. Likewise, a syntactic construct like an if-condition-then statement may be denoted by means of a single node with three branches. This distinguishes abstract syntax trees from concrete syntax trees, traditionally designated parse trees . Parse trees are typically built by

152-424: A context-free grammar (CFG). However, there are often aspects of programming languages that a CFG can't express, but are part of the language and are documented in its specification. These are details that require a context to determine their validity and behaviour. For example, if a language allows new types to be declared, a CFG cannot predict the names of such types nor the way in which they should be used. Even if

228-457: A parser during the source code translation and compiling process. Once built, additional information is added to the AST by means of subsequent processing, e.g., contextual analysis . Abstract syntax trees are also used in program analysis and program transformation systems. Abstract syntax trees are data structures widely used in compilers to represent the structure of program code. An AST

304-460: A verbose original: "To the extent that policymakers and elite opinion in general have made use of economic analysis at all, they have, as the saying goes, done so the way a drunkard uses a lamppost: for support, not illumination", can be quoted succinctly as: "[P]olicymakers [...] have made use of economic analysis [...] the way a drunkard uses a lamppost: for support, not illumination." When nested parentheses are needed, brackets are sometimes used as

380-416: A 'left' or 'right' bracket or, alternatively, an "opening bracket" or "closing bracket", respectively, depending on the directionality of the context. In casual writing and in technical fields such as computing or linguistic analysis of grammar , brackets nest , with segments of bracketed material containing embedded within them other further bracketed sub-segments. The number of opening brackets matches

456-549: A century as Received Pronunciation (RP). However, due to language evolution and changing social trends, some linguists argue that RP is losing prestige or has been replaced by another accent, one that the linguist Geoff Lindsey for instance calls Standard Southern British English. Others suggest that more regionally-oriented standard accents are emerging in England. Even in Scotland and Northern Ireland, RP exerts little influence in

532-408: A different order of operations . For example: in the usual order of algebraic operations, 4 × 3 + 2 equals 14, since the multiplication is done before the addition . However, 4 × (3 + 2) equals 20, because the parentheses override normal precedence, causing the addition to be done first. Some authors follow the convention in mathematical equations that, when parentheses have one level of nesting,

608-501: A greater movement, normally [əʊ], [əʉ] or [əɨ]. Dropping a morphological grammatical number , in collective nouns , is stronger in British English than North American English. This is to treat them as plural when once grammatically singular, a perceived natural number prevails, especially when applying to institutional nouns and groups of people. The noun 'police', for example, undergoes this treatment: Police are investigating

684-428: A language has a predefined set of types, enforcing proper usage usually requires some context. Another example is duck typing , where the type of an element can change depending on context. Operator overloading is yet another case where correct usage and final function are context-dependent. The design of an AST is often closely linked with the design of a compiler and its expected features. Core requirements include

760-406: A lesser class or social status and often discounted or considered of a low intelligence. Another contribution to the standardisation of British English was the introduction of the printing press to England in the mid-15th century. In doing so, William Caxton enabled a common language and spelling to be dispersed among the entirety of England at a much faster rate. Samuel Johnson's A Dictionary of

836-403: A parenthesis. Again, the parenthesis implies that the meaning and flow of the bracketed phrase is supplemental to the rest of the text and the whole would be unchanged were the parenthesized sentences removed. The term refers to the syntax rather than the enclosure method: the same clause in the form "Mrs. Pennyfarthing – What? Yes, that was her name! – was my landlady"

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912-648: A process called T-glottalisation . National media, being based in London, have seen the glottal stop spreading more widely than it once was in word endings, not being heard as "no [ʔ] " and bottle of water being heard as "bo [ʔ] le of wa [ʔ] er". It is still stigmatised when used at the beginning and central positions, such as later , while often has all but regained /t/ . Other consonants subject to this usage in Cockney English are p , as in pa [ʔ] er and k as in ba [ʔ] er. In most areas of England and Wales, outside

988-477: A range of blurring and ambiguity". Variations exist in formal (both written and spoken) English in the United Kingdom. For example, the adjective wee is almost exclusively used in parts of Scotland, north-east England, Northern Ireland, Ireland, and occasionally Yorkshire , whereas the adjective little is predominant elsewhere. Nevertheless, there is a meaningful degree of uniformity in written English within

1064-511: A regional accent or dialect. However, about 2% of Britons speak with an accent called Received Pronunciation (also called "the King's English", "Oxford English" and " BBC English" ), that is essentially region-less. It derives from a mixture of the Midlands and Southern dialects spoken in London in the early modern period. It is frequently used as a model for teaching English to foreign learners. In

1140-502: A substitute for the inner pair of parentheses within the outer pair. When deeper levels of nesting are needed, convention is to alternate between parentheses and brackets at each level. Alternatively, empty square brackets can also indicate omitted material, usually single letter only. The original, "Reading is also a process and it also changes you." can be rewritten in a quote as: It has been suggested that reading can "also change[] you". In translated works, brackets are used to signify

1216-542: Is a notation that was pioneered by Berzelius , who wanted chemical formulae to more resemble algebraic notation, with brackets enclosing groups that could be multiplied (e.g. in 3(AlO 2 + 2SO 3 ) the 3 multiplies everything within the parentheses). In chemical nomenclature , parentheses are used to distinguish structural features and multipliers for clarity, for example in the polymer poly(methyl methacrylate) . [ and ] are square brackets in both British and American English, but are also more simply brackets in

1292-437: Is also a parenthesis. (In non-specialist usage, the term "parenthetical phrase" is more widely understood. ) In phonetics , parentheses are used for indistinguishable or unidentified utterances. They are also seen for silent articulation (mouthing), where the expected phonetic transcription is derived from lip-reading, and with periods to indicate silent pauses, for example (...) or (2 sec) . An unpaired right parenthesis

1368-725: Is also due to London-centric influences. Examples of R-dropping are car and sugar , where the R is not pronounced. British dialects differ on the extent of diphthongisation of long vowels, with southern varieties extensively turning them into diphthongs, and with northern dialects normally preserving many of them. As a comparison, North American varieties could be said to be in-between. Long vowels /iː/ and /uː/ are usually preserved, and in several areas also /oː/ and /eː/, as in go and say (unlike other varieties of English, that change them to [oʊ] and [eɪ] respectively). Some areas go as far as not diphthongising medieval /iː/ and /uː/, that give rise to modern /aɪ/ and /aʊ/; that is, for example, in

1444-780: Is also used in British English. Parentheses contain adjunctive material that serves to clarify (in the manner of a gloss ) or is aside from the main point. A comma before or after the material can also be used, though if the sentence contains commas for other purposes, visual confusion may result. A dash before and after the material is also sometimes used. Parentheses may be used in formal writing to add supplementary information, such as "Senator John McCain ( R  - Arizona) spoke at length". They can also indicate shorthand for " either singular or plural " for nouns, e.g. "the claim(s)". It can also be used for gender-neutral language , especially in languages with grammatical gender , e.g. "(s)he agreed with his/her physician" (the slash in

1520-444: Is in any way altered, the alterations are enclosed in square brackets within the quotation to show that the quotation is not exactly as given, or to add an annotation . For example: The Plaintiff asserted his cause is just, stating, [m]y causes is [ sic ] just. In the original quoted sentence, the word "my" was capitalized: it has been modified in the quotation given and the change signalled with brackets. Similarly, where

1596-404: Is in doubt". Or one can quote the original statement "I hate to do laundry" with a (sometimes grammatical) modification inserted: He "hate[s] to do laundry". Additionally, a small letter can be replaced by a capital one, when the beginning of the original printed text is being quoted in another piece of text or when the original text has been omitted for succinctness— for example, when referring to

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1672-600: Is in the 1954 volume of the Appeal Cases reports, although the decision may have been given in 1953 or earlier. Compare with: British English British English (abbreviations: BrE , en-GB , and BE ) is the set of varieties of the English language native to the United Kingdom of Great Britain and Northern Ireland . More narrowly, it can refer specifically to the English language in England , or, more broadly, to

1748-769: Is included in style guides issued by various publishers including The Times newspaper, the Oxford University Press and the Cambridge University Press . The Oxford University Press guidelines were originally drafted as a single broadsheet page by Horace Henry Hart, and were at the time (1893) the first guide of their type in English; they were gradually expanded and eventually published, first as Hart's Rules , and in 2002 as part of The Oxford Manual of Style . Comparable in authority and stature to The Chicago Manual of Style for published American English ,

1824-511: Is now northwest Germany and the northern Netherlands. The resident population at this time was generally speaking Common Brittonic —the insular variety of Continental Celtic , which was influenced by the Roman occupation. This group of languages ( Welsh , Cornish , Cumbric ) cohabited alongside English into the modern period, but due to their remoteness from the Germanic languages , influence on English

1900-436: Is often used as part of a label in an ordered list, such as this one: a) educational testing, b) technical writing and diagrams, c) market research , and d) elections . Traditionally in accounting , contra amounts are placed in parentheses. A debit balance account in a series of credit balances will have parenthesis and vice versa. Parentheses are used in mathematical notation to indicate grouping, often inducing

1976-456: Is the case for English used by European Union institutions. In China, both British English and American English are taught. The UK government actively teaches and promotes English around the world and operates in over 200 countries . English is a West Germanic language that originated from the Anglo-Frisian dialects brought to Britain by Germanic settlers from various parts of what

2052-455: Is usually the result of the syntax analysis phase of a compiler. It often serves as an intermediate representation of the program through several stages that the compiler requires, and has a strong impact on the final output of the compiler. An AST has several properties that aid the further steps of the compilation process: Languages are often ambiguous by nature. In order to avoid this ambiguity, programming languages are often specified as

2128-530: The Chambers Dictionary , and the Collins Dictionary record actual usage rather than attempting to prescribe it. In addition, vocabulary and usage change with time; words are freely borrowed from other languages and other varieties of English, and neologisms are frequent. For historical reasons dating back to the rise of London in the ninth century, the form of language spoken in London and

2204-637: The East Midlands became standard English within the Court, and ultimately became the basis for generally accepted use in the law, government, literature and education in Britain. The standardisation of British English is thought to be from both dialect levelling and a thought of social superiority. Speaking in the Standard dialect created class distinctions; those who did not speak the standard English would be considered of

2280-512: The International Code of Nomenclature of Prokaryotes (ICNP) requires the use of the abbreviation "subgen". as well, e.g., Acetobacter (subgen. Gluconoacetobacter ) liquefaciens . Parentheses are used in chemistry to denote a repeated substructure within a molecule, e.g. HC(CH 3 ) 3 ( isobutane ) or, similarly, to indicate the stoichiometry of ionic compounds with such substructures: e.g. Ca(NO 3 ) 2 ( calcium nitrate ). This

2356-484: The Royal Spanish Academy with Spanish. Standard British English differs notably in certain vocabulary, grammar, and pronunciation features from standard American English and certain other standard English varieties around the world. British and American spelling also differ in minor ways. The accent, or pronunciation system, of standard British English, based in southeastern England, has been known for over

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2432-486: The Scots language or Scottish Gaelic ). Each group includes a range of dialects, some markedly different from others. The various British dialects also differ in the words that they have borrowed from other languages. Around the middle of the 15th century, there were points where within the 5 major dialects there were almost 500 ways to spell the word though . Following its last major survey of English Dialects (1949–1950),

2508-560: The University of Leeds has started work on a new project. In May 2007 the Arts and Humanities Research Council awarded a grant to Leeds to study British regional dialects. The team are sifting through a large collection of examples of regional slang words and phrases turned up by the "Voices project" run by the BBC , in which they invited the public to send in examples of English still spoken throughout

2584-601: The West Country and other near-by counties of the UK, the consonant R is not pronounced if not followed by a vowel, lengthening the preceding vowel instead. This phenomenon is known as non-rhoticity . In these same areas, a tendency exists to insert an R between a word ending in a vowel and a next word beginning with a vowel. This is called the intrusive R . It could be understood as a merger, in that words that once ended in an R and words that did not are no longer treated differently. This

2660-505: The em dash is currently used in alternatives, such as "parenthesis)(parentheses". Examples of this usage can be seen in editions of Fowler's Dictionary of Modern English Usage . Parentheses may be nested (generally with one set (such as this) inside another set). This is not commonly used in formal writing (though sometimes other brackets [especially square brackets] will be used for one or more inner set of parentheses [in other words, secondary {or even tertiary} phrases can be found within

2736-603: The 21st century. RP, while long established as the standard English accent around the globe due to the spread of the British Empire , is distinct from the standard English pronunciation in some parts of the world; most prominently, RP notably contrasts with standard North American accents. In the 21st century, dictionaries like the Oxford English Dictionary , the Longman Dictionary of Contemporary English ,

2812-427: The AST of the code. For instance, an edit action may result in the addition of a new AST node representing a function. An AST is a powerful abstraction to perform code clone detection . Bracket#Parentheses A bracket is either of two tall fore- or back-facing punctuation marks commonly used to isolate a segment of text or data from its surroundings. They come in four main pairs of shapes, as given in

2888-400: The AST serves as the base for code generation. The AST is often used to generate an intermediate representation (IR), sometimes called an intermediate language , for the code generation. AST differencing, or for short tree differencing, consists of computing the list of differences between two ASTs. This list of differences is typically called an edit script. The edit script directly refers to

2964-816: The English Language (1755) was a large step in the English-language spelling reform , where the purification of language focused on standardising both speech and spelling. By the early 20th century, British authors had produced numerous books intended as guides to English grammar and usage, a few of which achieved sufficient acclaim to have remained in print for long periods and to have been reissued in new editions after some decades. These include, most notably of all, Fowler's Modern English Usage and The Complete Plain Words by Sir Ernest Gowers . Detailed guidance on many aspects of writing British English for publication

3040-644: The Germanic schwein ) is the animal in the field bred by the occupied Anglo-Saxons and pork (like the French porc ) is the animal at the table eaten by the occupying Normans. Another example is the Anglo-Saxon cu meaning cow, and the French bœuf meaning beef. Cohabitation with the Scandinavians resulted in a significant grammatical simplification and lexical enrichment of the Anglo-Frisian core of English;

3116-891: The Oxford Manual is a fairly exhaustive standard for published British English that writers can turn to in the absence of specific guidance from their publishing house. British English is the basis of, and very similar to, Commonwealth English . Commonwealth English is English as spoken and written in the Commonwealth countries , though often with some local variation. This includes English spoken in Australia , Malta , New Zealand , Nigeria , and South Africa . It also includes South Asian English used in South Asia, in English varieties in Southeast Asia , and in parts of Africa. Canadian English

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3192-701: The South East, there are significantly different accents; the Cockney accent spoken by some East Londoners is strikingly different from Received Pronunciation (RP). Cockney rhyming slang can be (and was initially intended to be) difficult for outsiders to understand, although the extent of its use is often somewhat exaggerated. Londoners speak with a mixture of accents, depending on ethnicity, neighbourhood, class, age, upbringing, and sundry other factors. Estuary English has been gaining prominence in recent decades: it has some features of RP and some of Cockney. Immigrants to

3268-537: The UK in recent decades have brought many more languages to the country and particularly to London. Surveys started in 1979 by the Inner London Education Authority discovered over 125 languages being spoken domestically by the families of the inner city's schoolchildren. Notably Multicultural London English , a sociolect that emerged in the late 20th century spoken mainly by young, working-class people in multicultural parts of London . Since

3344-564: The United Kingdom , as well as within the countries themselves. The major divisions are normally classified as English English (or English as spoken in England (which is itself broadly grouped into Southern English , West Country , East and West Midlands English and Northern English ), Northern Irish English (in Northern Ireland), Welsh English (not to be confused with the Welsh language ), and Scottish English (not to be confused with

3420-426: The United Kingdom, and this could be described by the term British English . The forms of spoken English, however, vary considerably more than in most other areas of the world where English is spoken and so a uniform concept of British English is more difficult to apply to the spoken language. Globally, countries that are former British colonies or members of the Commonwealth tend to follow British English, as

3496-458: The West Scottish accent. Phonological features characteristic of British English revolve around the pronunciation of the letter R, as well as the dental plosive T and some diphthongs specific to this dialect. Once regarded as a Cockney feature, in a number of forms of spoken British English, /t/ has become commonly realised as a glottal stop [ʔ] when it is in the intervocalic position, in

3572-458: The Wolfram language, parentheses are used to indicate grouping – for example, with pure anonymous functions. If it is desired to include the subgenus when giving the scientific name of an animal species or subspecies , the subgenus's name is provided in parentheses between the genus name and the specific epithet . For instance, Polyphylla ( Xerasiobia ) alba is a way to cite

3648-481: The award of the grant in 2007, Leeds University stated: that they were "very pleased"—and indeed, "well chuffed"—at receiving their generous grant. He could, of course, have been "bostin" if he had come from the Black Country , or if he was a Scouser he would have been well "made up" over so many spondoolicks, because as a Geordie might say, £460,000 is a "canny load of chink". Most people in Britain speak with

3724-528: The box to the right, which also gives their names, that vary between British and American English . "Brackets", without further qualification, are in British English the ( ... ) marks and in American English the [ ... ] marks. Other minor bracket shapes exist, such as (for example) slash or diagonal brackets used by linguists to enclose phonemes . Brackets are typically deployed in symmetric pairs, and an individual bracket may be identified as

3800-455: The citation of law reports to identify parallel citations to non-official reporters. For example: Chronicle Pub. Co. v Superior Court (1998) 54 Cal.2d 548, [7 Cal.Rptr. 109] In some other countries (such as England and Wales ), square brackets are used to indicate that the year is part of the citation and parentheses are used to indicate the year the judgment was given. For example: National Coal Board v England [1954] AC 403 This case

3876-567: The collective dialects of English throughout the British Isles taken as a single umbrella variety, for instance additionally incorporating Scottish English , Welsh English , and Northern Irish English . Tom McArthur in the Oxford Guide to World English acknowledges that British English shares "all the ambiguities and tensions [with] the word 'British' and as a result can be used and interpreted in two ways, more broadly or more narrowly, within

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3952-613: The country. The BBC Voices project also collected hundreds of news articles about how the British speak English from swearing through to items on language schools. This information will also be collated and analysed by Johnson's team both for content and for where it was reported. "Perhaps the most remarkable finding in the Voices study is that the English language is as diverse as ever, despite our increased mobility and constant exposure to other accents and dialects through TV and radio". When discussing

4028-521: The enclosed text is italic. However, in other languages like German , if brackets enclose text in italics, they are usually also set in italics. ( and ) are parentheses / p ə ˈ r ɛ n θ ɪ s iː z / (singular parenthesis / p ə ˈ r ɛ n θ ɪ s ɪ s / ) in American English, and either round brackets or simply brackets in British English. They are also known as "parens" / p ə ˈ r ɛ n z / , "circle brackets", or "smooth brackets". In formal writing, "parentheses"

4104-650: The following: These requirements can be used to design the data structure for the AST. Some operations will always require two elements, such as the two terms for addition. However, some language constructs require an arbitrarily large number of children, such as argument lists passed to programs from the command shell . As a result, an AST used to represent code written in such a language has to also be flexible enough to allow for quick addition of an unknown quantity of children. To support compiler verification it should be possible to unparse an AST into source code form. The source code produced should be sufficiently similar to

4180-453: The idea of two different morphemes, one that causes the double negation, and one that is used for the point or the verb. Standard English in the United Kingdom, as in other English-speaking nations, is widely enforced in schools and by social norms for formal contexts but not by any singular authority; for instance, there is no institution equivalent to the Académie française with French or

4256-681: The inner pair are parentheses and the outer pair are square brackets. Example: Parentheses are included in the syntaxes of many programming languages . Typically needed to denote an argument; to tell the compiler what data type the Method/Function needs to look for first in order to initialise. In some cases, such as in LISP , parentheses are a fundamental construct of the language. They are also often used for scoping functions and operators and for arrays. In syntax diagrams they are used for grouping, such as in extended Backus–Naur form . In Mathematica and

4332-511: The last southern Midlands accent to use the broad "a" in words like bath or grass (i.e. barth or grarss ). Conversely crass or plastic use a slender "a". A few miles northwest in Leicestershire the slender "a" becomes more widespread generally. In the town of Corby , five miles (8 km) north, one can find Corbyite which, unlike the Kettering accent, is largely influenced by

4408-508: The later Norman occupation led to the grafting onto that Germanic core of a more elaborate layer of words from the Romance branch of the European languages. This Norman influence entered English largely through the courts and government. Thus, English developed into a "borrowing" language of great flexibility and with a huge vocabulary . Dialects and accents vary amongst the four countries of

4484-467: The latter. An older name for these brackets is "crotchets". Square brackets are often used to insert explanatory material or to mark where a [word or] passage was omitted from an original material by someone other than the original author, or to mark modifications in quotations. In transcribed interviews, sounds, responses and reactions that are not words but that can be described are set off in square brackets — "... [laughs] ...". When quoted material

4560-411: The main parenthetical sentence]). A parenthesis in rhetoric and linguistics refers to the entire bracketed text, not just to the enclosing marks used (so all the text in this set of round brackets may be described as "a parenthesis"). Taking as an example the sentence "Mrs. Pennyfarthing (What? Yes, that was her name!) was my landlady.", the explanatory phrase between the parentheses is itself called

4636-452: The mass internal migration to Northamptonshire in the 1940s and given its position between several major accent regions, it has become a source of various accent developments. In Northampton the older accent has been influenced by overspill Londoners. There is an accent known locally as the Kettering accent, which is a transitional accent between the East Midlands and East Anglian . It is

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4712-427: The number of closing brackets in such cases. Various forms of brackets are used in mathematics , with specific mathematical meanings, often for denoting specific mathematical functions and subformulas . Angle brackets or chevrons ⟨ ⟩ were the earliest type of bracket to appear in written English . Erasmus coined the term lunula to refer to the round brackets or parentheses (   ) recalling

4788-429: The original in appearance and identical in execution, upon recompilation. The AST is used intensively during semantic analysis , where the compiler checks for correct usage of the elements of the program and the language. The compiler also generates symbol tables based on the AST during semantic analysis. A complete traversal of the tree allows verification of the correctness of the program. After verifying correctness,

4864-500: The quotation contained a grammatical error (is/are), the quoting author signalled that the error was in the original with "[ sic ]" (Latin for 'thus'). A bracketed ellipsis , [...], is often used to indicate omitted material: "I'd like to thank [several unimportant people] for their tolerance [...]" Bracketed comments inserted into a quote indicate where the original has been modified for clarity: "I appreciate it [the honor], but I must refuse", and "the future of psionics [see definition]

4940-464: The same word or phrase in the original language to avoid ambiguity. For example: He is trained in the way of the open hand [karate]. Style and usage guides originating in the news industry of the twentieth century , such as the AP Stylebook , recommend against the use of square brackets because "They cannot be transmitted over news wires ." However, this guidance has little relevance outside of

5016-519: The second instance, as one alternative is replacing the other, not adding to it). Parenthetical phrases have been used extensively in informal writing and stream of consciousness literature. Examples include the southern American author William Faulkner (see Absalom, Absalom! and the Quentin section of The Sound and the Fury ) as well as poet E. E. Cummings . Parentheses have historically been used where

5092-425: The section of a dictionary entry which contains the etymology of the word the entry defines. Brackets (called move-left symbols or move right symbols ) are added to the sides of text in proofreading to indicate changes in indentation: Square brackets are used to denote parts of the text that need to be checked when preparing drafts prior to finalizing a document. Square brackets are used in some countries in

5168-556: The shape of the crescent moon ( Latin : luna ). Most typewriters only had the left and right parentheses. Square brackets appeared with some teleprinters. Braces (curly brackets) first became part of a character set with the 8-bit code of the IBM 7030 Stretch . In 1961, ASCII contained parentheses, square, and curly brackets, and also less-than and greater-than signs that could be used as angle brackets. In English, typographers mostly prefer not to set brackets in italics , even when

5244-403: The species Polyphylla alba while also mentioning that it is in the subgenus Xerasiobia . There is also a convention of citing a subgenus by enclosing it in parentheses after its genus, e.g., Polyphylla ( Xerasiobia ) is a way to refer to the subgenus Xerasiobia within the genus Polyphylla . Parentheses are similarly used to cite a subgenus with the name of a prokaryotic species, although

5320-524: The technological constraints of the industry and era. In linguistics, phonetic transcriptions are generally enclosed within square brackets, whereas phonemic transcriptions typically use paired slashes , according to International Phonetic Alphabet rules. Pipes (| |) are often used to indicate a morphophonemic rather than phonemic representation. Other conventions are double slashes (⫽ ⫽), double pipes (‖ ‖) and curly brackets ({ }). In lexicography , square brackets usually surround

5396-587: The theft of work tools worth £500 from a van at the Sprucefield park and ride car park in Lisburn. A football team can be treated likewise: Arsenal have lost just one of 20 home Premier League matches against Manchester City. This tendency can be observed in texts produced already in the 19th century. For example, Jane Austen , a British author, writes in Chapter 4 of Pride and Prejudice , published in 1813: All

5472-403: The traditional accent of Newcastle upon Tyne , 'out' will sound as 'oot', and in parts of Scotland and North-West England, 'my' will be pronounced as 'me'. Long vowels /iː/ and /uː/ are diphthongised to [ɪi] and [ʊu] respectively (or, more technically, [ʏʉ], with a raised tongue), so that ee and oo in feed and food are pronounced with a movement. The diphthong [oʊ] is also pronounced with

5548-560: The world are good and agreeable in your eyes. However, in Chapter 16, the grammatical number is used. The world is blinded by his fortune and consequence. Some dialects of British English use negative concords, also known as double negatives . Rather than changing a word or using a positive, words like nobody, not, nothing, and never would be used in the same sentence. While this does not occur in Standard English, it does occur in non-standard dialects. The double negation follows

5624-520: Was notably limited . However, the degree of influence remains debated, and it has recently been argued that its grammatical influence accounts for the substantial innovations noted between English and the other West Germanic languages. Initially, Old English was a diverse group of dialects, reflecting the varied origins of the Anglo-Saxon kingdoms of England. One of these dialects, Late West Saxon , eventually came to dominate. The original Old English

5700-422: Was never a truly mixed language in the strictest sense of the word; mixed languages arise from the cohabitation of speakers of different languages, who develop a hybrid tongue for basic communication). The more idiomatic, concrete and descriptive English is, the more it is from Anglo-Saxon origins. The more intellectual and abstract English is, the more it contains Latin and French influences, e.g. swine (like

5776-521: Was then influenced by two waves of invasion: the first was by speakers of the Scandinavian branch of the Germanic family, who settled in parts of Britain in the eighth and ninth centuries; the second was the Normans in the 11th century, who spoke Old Norman and ultimately developed an English variety of this called Anglo-Norman . These two invasions caused English to become "mixed" to some degree (though it

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