Capitalization


Capitalization or capitalisation is writing a word with its first letter as a capital letter and the remaining letters in lower case, in writing systems with a case distinction. The term also may refer to the choice of the casing applied to text.
Conventional writing systems for different languages have different conventions for capitalization, for example the capitalization of titles. Conventions also vary, to a lesser extent, between different style guides.
The full rules of capitalization for English are complicated. The rules have also changed over time, generally to capitalize fewer words. The conventions used in an 18th-century document will be unfamiliar to a modern reader; for instance, many common nouns are capitalized.
The systematic use of capitalized and uncapitalized words in running text is called "mixed case".

Parts of speech

Owing to the essentially arbitrary nature of orthographic classification and the existence of variant authorities and local house styles, questionable capitalization of words is not uncommon, even in respected newspapers and magazines. Most publishers require consistency, at least within the same document, in applying a specified standard: this is described as "house style".

Pronouns

Many languages distinguish between formal and informal 2nd person pronouns.
The capitalization of geographic terms in English text generally depends on whether the author perceives the term as a proper noun, in which case it is capitalized, or as a combination of an established proper noun with a normal adjective or noun, in which case the latter are not capitalized. There are no universally agreed lists of English geographic terms which are considered as proper nouns. The following are examples of rules that some British and U.S. publishers have established in style guides for their authors:
Upper case: East Asia, South-East Asia, Central Asia, Central America, North Korea, South Africa, the European Union, the Republic of Poland, the North Atlantic, the Middle East, the Arctic, The Hague
Lower case: western China, southern Beijing, western Mongolia, eastern Africa, northern North Korea, the central Gobi, the lower Yangtze River.
Abbreviated
When a term is used as a name and then subsequently a shorter term is used then that shorter term maybe used generically. If that is the case do not capitalize.

By context

The following names are given to systems of capitalization:

Sentence case

"The quick brown fox jumps over the lazy dog."
The standard case used in English prose. Generally equivalent to the baseline universal standard of formal English orthography mentioned above; that is, only the first word is capitalized, except for proper nouns and other words which are generally capitalized by a more specific rule.

Title case

"The Quick Brown Fox Jumps Over The Lazy Dog."
or
"The Quick Brown Fox Jumps Over the Lazy Dog."
Also known as headline style and capital case. All words capitalized, except for certain subsets defined by rules that are not universally standardized, often minor words such as "the", "of", or "and". The standardization is only at the level of house styles and individual style manuals. A simplified variant is start case, where all words, including articles, prepositions, and conjunctions, start with a capital letter.

All caps

Also known/written as "all-caps". Capital letters only. This style can be used for headlines and book or chapter titles at the top of a book page. It is commonly used in transcribed speech to indicate that a person is shouting, or to indicate a hectoring and obnoxious speaker. For this reason, it is generally discouraged. Long spans of Latin-alphabet text in all uppercase are harder to read because of the absence of the ascenders and descenders found in lowercase letters, which can aid recognition. In professional documents, a commonly preferred alternative to all–caps text is the use of small caps to emphasize key names or acronyms, or the use of italics or bold. In addition, if all–caps must be used, it is customary in headings of a few words to slightly widen the spacing between the letters, by around 10% of the point height. This practice is known as tracking or letterspacing.

Special cases

Compound names

The titles of many English-language artistic works capitalize the first word and the last word in the title. Additionally, most other words within a title are capitalized as well; articles and coordinating conjunctions are not capitalized. Sources disagree on the details of capitalizing prepositions. For example, the Chicago Manual of Style recommends rendering all prepositions in lowercase, whereas the APA style guide instructs: Capitalize major words in titles of books and articles within the body of the paper. Conjunctions, articles, and short prepositions are not considered major words; however, capitalize all words of four letters or more.
In other languages, such as the Romance languages, only the first word and proper names are capitalized.

Acronyms

are usually capitalized, with a few exceptions:
In most languages that use diacritics, these are treated the same way in uppercase whether the text is capitalized or all-uppercase. They may be always preserved or always omitted or often omitted. Some attribute this to the fact that diacritics on capital letters were not available earlier on typewriters, and it is now becoming more common to preserve them in French and Spanish.
However, in the polytonic orthography used for Greek prior to 1982, accents were omitted in all-uppercase words, but kept as part of an uppercase initial. The latter situation is provided for by title-case characters in Unicode. When Greek is written with the present day monotonic orthography, where only the acute accent is used, the same rule is applied. The accent is omitted in all-uppercase words but it is kept as part of an uppercase initial. The dialytika should also always be used in all-uppercase words.

Digraphs and ligatures

Some languages treat certain digraphs as single letters for the purpose of collation. In general, where one such is formed as a ligature, the corresponding uppercase form is used in capitalization; where it is written as two separate characters, only the first will be capitalized. Thus Oedipus or Œdipus are both correct, but OEdipus is not. Examples with ligature include Ærøskøbing in Danish, where Æ/æ is a completely separate letter rather than merely a typographic ligature ; examples with separate characters are Llanelli in Welsh, where Ll is a single letter; and Ffrangeg in Welsh where Ff is equivalent to English F. Presentation forms, however, can use doubled capitals, such as the logo of the National Library of Wales. The position in Hungarian is similar to the latter.
In languages where inflected forms of a word may have extra letters at the start, the capitalized letter may be the initial of the root form rather than the inflected form. For example, in Irish, in the placename Sliabh na mBan, " mountain of the women" , the word-form written mBan contains the genitive plural of the noun bean, "woman", mutated after the genitive plural definite article. The written B is mute in this form.
Other languages may capitalize the initial letter of the orthographic word, even if it is not present in the base, as with definite nouns in Maltese that start with certain consonant clusters. For example, l-Istati Uniti capitalize the epenthetic I, even though the base form of the word — without the definite article — is stati.

Case-sensitive English words

In English, there are a few capitonyms, which are words whose meaning varies with capitalization. For example, the month August versus the adjective august. Or the verb polish versus the adjective Polish.