Ellipsis

For other uses, see Ellipsis (disambiguation).

Ellipsis (plural ellipses; or "three little points of suspension"; from the Greek: ἔλλειψις, élleipsis, "omission") is a mark or series of marks that usually indicate an intentional omission of a word in the original text. An ellipsis can also be used to indicate a pause in speech, an unfinished thought, or, at the end of a sentence, a trailing off into silence (aposiopesis) (apostrophe and ellipsis mixed). When placed at the end of a sentence, the ellipsis can also inspire a feeling of melancholy longing. The ellipsis calls for a slight pause in speech.

The most common form of an ellipsis is a row of three periods or full stops (...) or pre-composed triple-dot glyph (…). The usage of the em dash (—) can overlap the usage of the ellipsis.

The triple-dot punctuation mark is also called a suspension point, points of ellipsis, periods of ellipsis, or colloquially, dot-dot-dot.

In writing

In the United States, the correct notation for an ellipsis is "..." per Modern Language Association (MLA) standards. The use of ellipsis can either mislead or insult, and the reader must rely on the good intentions of the writer who uses them. An example of this ambiguity is "She went to … school." In this sentence, "…" might represent the word "elementary". Alternatively, in a usage more common in the 19th and early 20th centuries, ellipsis can be used when a writer intentionally omits a specific proper noun, such as a location: "Jan was born on ... Street in Warsaw." Omission of part of a quoted sentence without indication by an ellipsis (or bracketed text) would mislead the readers. For example, "She went to school," as opposed to "She went to Broadmoor Elementary school."

An ellipsis may also imply an unstated alternative indicated by context. For example, when Count Dracula says "I never drink...wine", the implication is that he does drink something else.

In writing the speech of a character in fiction or nonfiction, the ellipsis is sometimes used to represent an intentional silence of a character, usually invoked to emphasize a character's irritation, appall, shock or disgust.

Across different languages

In English

The style and use varies in the English language. In legal writing in the United States, Rule 5.3 in the Bluebook citation guide governs the use of ellipsis and requires a space before the first dot and between the two subsequent dots. If an ellipsis ends the sentence, then there are three dots, each separated by a space, followed by the final punctuation.

The Chicago Manual of Style suggests the use of an ellipsis for any omitted word, phrase, line, or paragraph from within a quoted passage. There are two commonly used methods of using ellipsis: one uses three dots for any omission, while the second makes a distinction between omissions within a sentence (using three dots: . . .) and omissions between sentences (using a period and a space followed by three dots: . ...). An ellipsis at the end of a sentence with no sentence following should be followed by a period (for a total of four dots). The Modern Language Association (MLA) however, used to indicate that an ellipsis must include spaces before and after each dot in all uses. If an ellipsis is meant to represent an omission, square brackets must surround the ellipsis to make it clear that there was no pause in the original quote: [ . . . ]. Currently, the MLA has removed the requirement of brackets in their style handbooks. However, the use of brackets is still correct as it clears confusion.

According to Robert Bringhurst's Elements of Typographic Style, the details of typesetting ellipsis depend on the character and size of the font being set and the typographer's preference. Bringhurst writes that a full space between each dot is "another Victorian eccentricity." In most contexts, the Chicago ellipsis is much too wide"—he recommends using flush dots, or thin-spaced dots (up to one-fifth of an em), or the prefabricated ellipsis character (Unicode U+2026, Latin entity …). Bringhurst suggests that normally an ellipsis should be spaced fore-and-aft to separate it from the text, but when it combines with other punctuation, the leading space disappears and the other punctuation follows. He provides the following examples:

i … j

k…

l…, l

l, … l

m…?

n…!

In Polish

In Polish, an ellipsis (called [wielokropek] Error: {{Lang}}: text has italic markup (help), which means "multidot") is always composed of three dots without any spaces between. There is no space between the ellipsis and the preceding word, but there is always a space after the ellipsis, unless the following character is a closing bracket or quote mark, in which case the space is inserted after that character instead.

When the ellipsis is used for omitting a fragment of quotation, it is always surrounded with either square brackets or, more commonly, parentheses, with no space inside. An ellipsis without parentheses usually means a pause in speech. It can also mean a word said partially and interrupted and in that case can be directly followed by another punctuation mark without space: Ellipsis can be used at the end of a sentence, but it is always composed of three dots, never four, and the only difference is the capitalisation of the next word.

The punctuation rules for ellipses are standardized by the PN-83/P-55366 standard from 1983, Rules for setting texts in the Polish Language ([Zasady składania tekstów w języku polskim] Error: {{Lang}}: text has italic markup (help)).

In Japanese

In writing, the ellipsis consists usually of three dots (one ellipsis character) or six dots (two ellipsis characters), … or ……; however, variations in the number of dots exist. In horizontally written text the dots are commonly vertically centered within the text height (between the baseline and the ascent line), as in the standard Japanese Windows fonts; in vertically written text the dots are always centered horizontally. As the Japanese word for dot is pronounced "ten", the dots are colloquially called "ten-ten-ten" (てんてんてん, akin to the English "dot dot dot"). More officially, they are called "n-dot leaders" (n-ten rīda, n-ten rīdā), where n corresponds to the number of dots.

In Japanese manga, the ellipsis by itself represents speechlessness, or a "pregnant pause". Given the context, this could be anything from an admission of guilt or an expression of being dumbfounded as a result of something that another person has just said or done. As a device, the ten-ten-ten is intended to focus the reader on a character while allowing the character to not speak any dialogue. This conveys to the reader a focus of the narrative "camera" on the silent subject, implying an expectation of some motion or action. It is not unheard of to see inanimate objects "speaking" the ellipsis.

In Chinese

In Chinese, the ellipsis is six dots (in two groups of three dots, occupying the same horizontal space as two characters) (i.e. ……). The dots are always centered within the baseline and the ascender when horizontal, but on the baseline are also accepted today; and centred horizontally when vertical.

In mathematical notation

An ellipsis is also often used in mathematics to mean "and so forth". In a list, between commas, or following a comma, a normal ellipsis is used, as in:

$1,2,3,\ldots ,100\,.$

To indicate the omission of values in a repeated operation, an ellipsis raised to the center of the line is used between two operation symbols or following the last operation symbol, as in:

$1+2+3+\cdots +100\,.$

The latter formula means the sum of all natural numbers from 1 to 100. However, it is not a formally defined mathematical symbol. Repeated summations or products may similarly be denoted using capital sigma and capital pi notation, respectively:

$1+2+3+\cdots +100\ =\sum _{n=1}^{100}n$

$1\times 2\times 3\times \cdots \times 100\ =\prod _{n=1}^{100}n=100!$ (see factorial)

Normally dots should only be used where the pattern to be followed is clear, the exception being to show the indefinite continuation of an irrational number such as:

$\pi =3.14159265\ldots$.

Sometimes, it is useful to display a formula compactly, for example:

$1+4+9+\cdots +n^{2}+\cdots +400\,.$

Another example is the set of zeros of the cosine function.

$\left\{\pm {\frac {\pi }{2}},\pm {\frac {3\pi }{2}},\pm {\frac {5\pi }{2}},\ldots \right\}\,.$

There are many related uses of the ellipsis in set notation.

The diagonal and vertical forms of the ellipsis are particularly useful for showing missing terms in matrices, such as the size-n identity matrix

$I_{n}={\begin{bmatrix}1&0&\cdots &0\\0&1&\cdots &0\\\vdots &\vdots &\ddots &\vdots \\0&0&\cdots &1\end{bmatrix}}.$

The use of ellipsis in mathematical proofs is often deprecated because of the potential for ambiguity.

In programming

In some programming languages (including Perl, Ruby, Groovy, Haskell, and Pascal), a shortened two-dot ellipsis is used to represent a range of values given two endpoints; for example, to iterate through a list of integers between 1 and 100 inclusive in Perl:

foreach (1..100)

Perl overloads the ".." operator in scalar context as a stateful bistable Boolean test, roughly equivalent to "true while x but not yet y". In Perl6, the 3-character ellipsis is also known as the "yadda yadda yadda" operator and, similarly to its linguistic meaning, serves as a "stand-in" for code to be inserted later. In addition, an actual Unicode ellipsis character is used to serve as a type of marker in a perl6 format string.

In the C programming language, an ellipsis is used to represent a variable number of parameters to a function. For example:

void func(const char* str, ...)

The above function in C could then be called with different types and numbers of parameters such as:

func("input string", 5, 10, 15);

and

func("input string", "another string", 0.5);

As of version 1.5, Java has adopted this "varargs" functionality. For example:

public int func(int num, String... strings)

In MATLAB, a three-character ellipsis is used to indicate line continuation, making the sequence of lines

x = [ 1 2 3 ...
4 5 6 ];

semantically equivalent to the single line

x = [ 1 2 3 4 5 6 ];

Most programming languages other than Perl6 require the ellipsis to be written as a series of periods; a single (Unicode) ellipsis character cannot be used.

In computer interfaces

Ellipses are often used in an operating system's taskbars or web browser tabs to indicate longer titles than will fit. Hovering the cursor over the tab often shows a pop-up balloon of the full title. When many programs are open, or during a "tab explosion" in web browsing, the tabs may be reduced in size so much that no characters from the actual titles show, and ellipses take up all the space besides the program icon or favicon.

In many user interface guidelines, a "..." after the name of a command implies that the user will need to provide further information, for example in a subsequent dialog box, before the action can be completed. A typical example is the Save As... command, which after being clicked will usually require the user to enter a file name, as opposed to Save where the file will usually be saved under the existing name of the file. Also, an ellipsis character after a status message signifies that an operation may take some time, for example as in "Downloading updates...".

On the Internet and in text messaging

The ellipsis is one of the favorite constructions of internet chat rooms, and has evolved over the past ten years into a staple of text-messaging. Though an ellipsis is technically complete with three periods (...), its rise in popularity as a "trailing-off" or "silence" indicator, particularly in mid-20th century comic strip and comic book prose writing, has led to expanded uses online. It has been used in new ways online, sometimes at the end of a message "to signal that the rest of the message is forthcoming."

Today, extended ellipsis of two, seven, ten, or even dozens of periods have become common constructions in internet chat rooms and text messages.^{[this citation is incomplete]} Often the extended ellipses indicate an awkward silence or a "no comment" response to the previous statement made by the other party. They are sometimes used jokingly or for emphatic confusion about what the other person has said.

"Elliptical commas", or commas used in plurality for the effect of ellipsis or multiple ellipsis, have also grown in popularity online—though no style journal or manual has yet embraced them.^{[this citation is incomplete]}

Computer representations

In computing, several ellipsis characters have been codified, depending on the system used.

In the Unicode standard, there are the following characters:

Name	Character	Unicode	HTML Entity Name	Mac Keyboard Code	Use
Horizontal Ellipsis	…	U+2026	…	Option+;	General
Laotian Ellipsis	ຯ	U+0EAF			General
Mongolian Ellipsis	᠁	U+1801			General
Thai Ellipsis	ฯ	U+0E2F			General
Vertical Ellipsis	⋮	U+22EE			Mathematics
Midline Horizontal Ellipsis	⋯	U+22EF			Mathematics
Up-Right Diagonal Ellipsis	⋰	U+22F0			Mathematics
Down-Right Diagonal Ellipsis	⋱	U+22F1			Mathematics

In Chinese and sometimes in Japanese, ellipsis characters are done by entering two consecutive horizontal ellipsis (U+2026). In vertical texts, the application should rotate the symbol accordingly.

Unicode recognizes a series of three period characters (U+002E) as equivalent to the horizontal ellipsis character.

In HTML, the horizontal ellipsis character may be represented by the entity reference … (since HTML 4.0). Alternatively, in HTML, XML, and SGML, a numeric character reference such as … or … can be used.

In the [[TeX|Template:TeX]] typesetting system, the following types of ellipsis are available:

	Character	Template:TeX markup
Lower ellipsis	$\ldots \,\!$	\ldots
Centred ellipsis	$\cdots \,\!$	\cdots
Diagonal ellipsis	$\ddots \,\!$	\ddots
Vertical ellipsis	$\vdots \,\!$	\vdots

The horizontal ellipsis character also appears in the following older character maps:

• in Windows-1250—Windows-1258 and in IBM/MS-DOS Code page 874, at code 85 (hexadecimal)
• in Mac-Roman and Mac-CentEuro at code C9 (hexadecimal)
• in Ventura International encoding at code C1 (hexadecimal)

As with all characters, especially those outside of the ASCII range, the author, sender and receiver of an encoded ellipsis must be in agreement upon what bytes are being used to represent the character. Naive text processing software may improperly assume that a particular encoding is being used, resulting in mojibake.

The Chicago Style Q&A recommends to avoid the use of … (U+2026) character in manuscripts and to place three periods plus two nonbreaking spaces (. . .) instead. Note the Chicago Style Q&A states in the same answer that "the numeric entity for an ellipsis is not formally defined for standard HTML", which contradicts to explicitly given "…" as a numeric reference to the horizontal ellipsis character in HTML 4 standard. This misbelief of the Chicago Style Q&A may have roots in long lasting confusion between Windows-1252 on one hand and Unicode and ISO 8859-1 on another.

In Abstract Syntax Notation One (ASN.1), the ellipsis is used as extension marker to indicate the possibility of type extensions in the future revisions of a protocol specification. In a type constraint expression like A ::= INTEGER (0..127, ..., 256..511) ellipsis is used to separate extension root from extension additions. Definition of type A in version 1 system of the form A ::= INTEGER (0..127, ...) and definition of type A in version 2 system of the form A ::= INTEGER (0..127, ..., 256..511) constitute extension series of the same type A in different versions of the same specification. The ellipsis can also be used in compound type definitions to separate the set of fields belonging to the extension root from the set of fields constituting extension additions. Here is an example: B ::= SEQUENCE { a INTEGER, b INTEGER, ..., c INTEGER }

Further reading

• Bringhurst, Robert (2002). The Elements of Typographic Style (Version 2.5 ed.). Point Roberts, WA: Hartley & Marks. pp. 82–83. ISBN 9780881791327. OCLC 50848361. See also Wikipedia article The Elements of Typographic Style.
• Morris, William (1980). The Houghton Mifflin Canadian Dictionary of the English Language. Markham, ON: Houghton Mifflin Canada. pp. 424 (spacing of dots: . . .). ISBN 9780395296547. OCLC 8063090.