Editing XeTeX (section)

{{short description|TeX typesetting engine}}
{{Use mdy dates|date=June 2013}}
{{more citations needed|date=March 2013}}
{{Infobox software
| name                   = XeTeX
| logo                   = XeTeX Logo.svg
| logo size              = 200px
| author                 = Jonathan Kew
| developer              =
| latest release version = 0.999992
| latest release date    = {{Start date and age|2020|01|20}}
| programming language   = [[Pascal (programming language)|Pascal]] ([[WEB]]), [[C (programming language)|C]] and [[C++]]
| operating_system       = [[Cross-platform]]
| genre                  = [[Typesetting]]
| license                = [[MIT License]]
| website                = {{URL|https://xetex.sourceforge.net}}
}}

'''XeTeX''' ({{IPAc-en|ˈ|z|iː|t|ɛ|x}} {{respell|ZEE|tekh}}<ref>{{cite interview|last=Kew |first=Jonathan |url=http://tug.org/interviews/interview-files/jonathan-kew.html |interviewer=Dave Walden |title=Jonathan Kew |work=TUG |date=April 3, 2007 |access-date=2009-11-20}}</ref>
or {{IPAc-en|ˈ|z|iː|t|ɛ|k}}; see also [[TeX#Pronunciation and spelling|Pronouncing and writing "TeX"]]) is a [[TeX]] [[typesetting|typesetting engine]] using [[Unicode]] and supporting modern font technologies such as [[OpenType]], [[Graphite (SIL)|Graphite]] and [[Apple Advanced Typography]] (AAT). It was originally written by Jonathan Kew and is distributed under the [[MIT License|X11 free software license]].<ref>{{Cite web| url=http://sourceforge.net/p/xetex/code/ci/master/tree/source/texk/web2c/xetexdir/COPYING | title=XeTeX COPYING file | access-date=2013-03-18}}</ref>

The last change to the source code was made on January 20, 2020, and there has been no further development since then.<ref>{{cite web|
url=https://sourceforge.net/projects/xetex/|
title=XeTeX - Unicode-based TeX Code|
work=SourceForge|
date=May 21, 2024|
access-date=2024-05-27|
language=en}}</ref> Usage of XeLaTeX is now discouraged.<ref name="LuaLaTeX">[https://www.texdev.net/2024/11/05/engine-news-from-the-latex-project Engine news from the LaTeX Project]</ref>

Initially developed for [[macOS|Mac OS X]] only, it is now available for all major platforms. It natively supports Unicode and the input file is assumed to be in [[UTF-8]] encoding by default. XeTeX can use any fonts installed in the operating system without configuring [[TeX font metric]]s, and can make direct use of advanced typographic features of [[OpenType]], [[Apple Advanced Typography|AAT]] and [[Graphite (SIL)|Graphite]] technologies such as alternative [[glyph]]s and [[swash (typography)|swashes]], optional or historic [[Typographical ligature|ligatures]], and variable font weights. Support for OpenType local typographic conventions (<code>locl</code> tag) is also present. XeTeX even allows raw OpenType feature tags to be passed to the font. [[Microtypography]] is also supported. XeTeX also supports typesetting mathematics using Unicode fonts that contain special mathematical features, such as [[Cambria (typeface)#Cambria Math|Cambria Math]] or [[Asana-Math|Asana Math]] as an alternative to the traditional mathematical typesetting based on TeX font metrics.