Editing Apostrophe (section)

===Entering apostrophes===
Although ubiquitous in typeset material, the punctuation apostrophe ({{serif|{{char|’}}}}) is rather difficult to enter on a computer, since it does not have its own key on most types of [[Computer keyboard|consumer keyboard]]. Outside the world of professional typesetting and graphic design, most people use the typewriter apostrophe ({{serif|{{char|'}}}}). Because typewriter apostrophes are now often [[Autocorrection|automatically converted]] to punctuation apostrophes by [[Word processor|word processing]] and similar software, the punctuation apostrophe routinely appears in documents produced by non-professionals (albeit sometimes incorrectly—see {{slink||Smart Quotes}} below).

[[XML]] (and hence [[XHTML]]) defines an <code>&amp;apos;</code> [[character entity reference]] for the ASCII typewriter apostrophe. This entity reference is officially supported in HTML since [[HTML 5]].{{NoteTag|It is ''not'' defined in [[HTML 4]]<ref>{{cite web |url=http://www.w3.org/TR/1999/REC-html401-19991224/sgml/entities.html |title=Character entity references in HTML 4 |publisher=World Wide Web Consortium |date=24 December 1999 |access-date=15 October 2011 |archive-date=11 May 2010 |archive-url=https://web.archive.org/web/20100511050448/http://www.w3.org/TR/1999/REC-html401-19991224/sgml/entities.html |url-status=live}}</ref> despite all the other predefined character entities from XML being defined.}}