Ellipsis



Ellipsis (plural ellipses; from the ἔλλειψις, élleipsis, "omission" or "falling short") is a 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). 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 a 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 19th and early 20th centuries, ellipsis was often used when a writer intentionally omitted a specific proper noun, such as a location: "Jan was born on ... Street in Warsaw."

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 reported speech, the ellipsis is sometimes used to represent an intentional silence, perhaps indicating irritation, dismay, shock or disgust. This definition is more known with younger, internet savvy generations.

In news reporting, it is used to indicate that a quotation has been condensed for space, brevity or relevance.

In English
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 ellipses: one uses three dots for any omission, while the second one 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 its style handbooks. However, some maintain that the use of brackets is still correct because it clears confusion.

According to the Associated Press, the ellipsis should be used to condense quotations. It is less-commonly used to indicate a pause in speech or an unfinished thought or to separate items in material such as show business gossip. The stylebook indicates that if the shortened sentence before the mark can stand as a sentence, it should do so, with an ellipsis placed after the period or other ending punctuation. When material at the tail of a paragraph, an ellipsis goes both at the end of the quoted section and in front of the beginning of the next paragraph, according to this style.

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"&mdash;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 &amp;hellip;). 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. This is the usual practice in typesetting. He provides the following examples:

In Polish
When applied in Polish language syntax, the ellipsis is called wielokropek, which means "multidot". The word wielokropek distinguishes the ellipsis of Polish syntax from that of mathematical notation, in which it is known as an elipsa.

When an ellipsis replaces a fragment omitted from a quotation, the ellipsis is enclosed in parentheses or square brackets. An unbracketed ellipsis indicates an interruption or pause in speech.

When a sentence terminates with an ellipsis, the ellipsis replaces the full stop; therefore, there is no occasion to use a four-dot ellipsis in written Polish.

The syntactical rules for ellipses are standardized by the 1983 Polska Norma document PN-83/P-55366, Zasady składania tekstów w języku polskim ("Rules for setting texts in the Polish Language").

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 to an expression of being dumbfounded at another person's words or actions. 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 (on the baseline has become acceptable) and centered 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:


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

(though sometimes, for example, in Russian mathematical texts, normal, non-raised, ellipses are used even in repeated summations ).

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 be used only 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 ellipses in mathematical proofs is often deprecated because of the potential for ambiguity. For this reason, and because the ellipsis supports no systematic rules for symbolic calculation, in recent years authors have recommended avoiding its use in mathematics altogether. In programming, however, the situation is different, because there the notation (.. or ...) has precise semantics and hence the term "ellipsis" is not always appropriate.

Computer interfaces and programming
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 filename, as opposed to Save where the file will usually be saved under its existing name.

An ellipsis character after a status message signifies that an operation may take some time, as in "Downloading updates…".

The ellipsis is used as an operator in some programming languages. The precise meaning varies by language, but it generally involves something dealing with multiple items. See Ellipsis (programming operator).

On the Internet and in text messaging
The ellipsis is one of the favorite constructions of Internet chat rooms, and it has evolved over the past ten years into a staple of text-messaging. Although 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.

The incorrect use of "elliptical commas", or commas used in plurality for the effect of ellipsis or multiple ellipsis, has also grown in popularity online&mdash;although 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:

In Windows, it can be inserted with ALT+0133.

In the Mac OS, it can be inserted with OPTION+; (on an English language keyboard).

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 compatibility equivalent (though not canonical) 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 typesetting system, the following types of ellipsis are available:

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, Mac-CentEuro and several other Macintosh encodings, at code C9 (hexadecimal)
 * in Ventura International encoding at code C1 (hexadecimal)

Note that ISO/IEC 8859 encoding series provides no code point for ellipsis.

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.

In Abstract Syntax Notation One (ASN.1), the ellipsis is used as an extension marker to indicate the possibility of type extensions in future revisions of a protocol specification. In a type constraint expression like A ::= INTEGER (0..127, ..., 256..511) an ellipsis is used to separate the extension root from extension additions. The definition of type A in version 1 system of the form A ::= INTEGER (0..127, ...) and the definition of type A in version 2 system of the form A ::= INTEGER (0..127, ..., 256..511) constitute an 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 }