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<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="generator" content="Docutils 0.12: http://docutils.sourceforge.net/" />
<title>textalpha: Greek symbols in text</title>
<meta name="copyright" content="© 2010 Günter Milde" />
<link rel="stylesheet" href="../../../../../Python/docutils-svn/docutils/docutils/writers/html4strict/html4css1.css" type="text/css" />
<link rel="stylesheet" href="../../../../../Python/docutils-svn/docutils/docutils/writers/html4strict/html4css2.css" type="text/css" />
</head>
<body>
<div class="document" id="textalpha-greek-symbols-in-text">
<h1 class="title">textalpha: Greek symbols in text</h1>

<dl class="docinfo">
<dt class="copyright">Copyright</dt>
<dd class="copyright">© 2010 Günter Milde</dd>
<dt>Licence</dt>
<dd><p>This work may be distributed and/or modified under the
conditions of the <a class="reference external" href="http://www.latex-project.org/lppl.txt">LaTeX Project Public License</a>, either
version&nbsp;1.3 of this license or any later version.</p>
</dd>
<dt>Identification</dt>
<dd><pre class="literal-block">\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{textalpha}
[2013/11/28 v0.11 macros for Greek letters in text]
</pre>
</dd>
</dl>
<div class="abstract topic">
<p class="topic-title first">Abstract</p>
<p>Provide a set of <tt class="literal">\text*</tt> macros for Greek letters
outside math.</p>
</div>
<div class="note">
<p class="admonition-title">Note</p>
<p>The package was renamed from <cite>textgreek</cite> to <cite>textalpha</cite> to prevent
confusion with the <a class="reference external" href="http://www.ctan.org/pkg/textgreek">textgreek</a> package by Leonard Michlmayr.</p>
</div>
<dl class="docutils">
<dt>Changelog:</dt>
<dd><table class="borderless">
<colgroup>
<col width="14%" />
<col width="7%" />
<col width="79%" />
</colgroup>
<tbody>
<tr><td><p>2010-06-16</p></td>
<td><p>0.1</p></td>
<td><p>initial version</p></td>
</tr>
<tr><td><p>2012-06-27</p></td>
<td><p>0.2</p></td>
<td><p>support for compound Unicode definitions outside LGR</p></td>
</tr>
<tr><td><p>2013-05-03</p></td>
<td><p>0.3</p></td>
<td><p>new accent macro names with <tt class="literal">lgrxenc.def</tt> 0.7</p></td>
</tr>
<tr><td><p>2013-05-28</p></td>
<td><p>0.4</p></td>
<td><p>use <tt class="literal">lgrenc.def</tt> from greek-fontenc.</p></td>
</tr>
<tr><td><p>2013-09-11</p></td>
<td><p>0.5</p></td>
<td><p>move to <a class="reference external" href="http://www.ctan.org/pkg/greek-fontenc">greek-fontenc</a>,</p></td>
</tr>
<tr><td><!--  -->
</td>
<td>&nbsp;</td>
<td><p>support XeTeX/LuaTeX, add breve below accents.</p></td>
</tr>
<tr><td><p>2013-11-28</p></td>
<td><p>0.11</p></td>
<td><p>Compatibility with Xe/LuaTeX in 8-bit mode.</p></td>
</tr>
</tbody>
</table>
</dd>
</dl>
<div class="section" id="motivation">
<h1>Motivation</h1>
<p>By default, TeX macros for Greek letters are only valid in mathematical
mode. This package sets up a suitable font encoding and Greek LICR
definitions (<tt class="literal">\textalpha</tt> – <tt class="literal">\textOmega</tt>).</p>
<p>To allow documents using Greek LICR macros without worrying about the TeX
engine used to compile them, this package tests the declared font encodings
and does “the right thing” to set up Greek text font support:</p>
<ul>
<li><p>If the Unicode font encodings EU1 (XeTeX) or EU2 (LuaTeX) are declared,
before loading this package (e.g. vie <tt class="literal">fontspec</tt>) the package provides
Greek LICR definitions for them.</p></li>
<li><p>If the LGR font encoding is declared before loading this package, it is
set as default for Greek LICR macros (cf. <a class="reference external" href="http://www.ctan.org/tex-archive/macros/latex/doc/fntguide.pdf">fntguide</a> section 5.3).</p>
<p>With XeTeX or LuaTex, Unicode fonts and LGR encoded 8-bit fonts can be
used in the same document (see <a class="reference external" href="test-euenc.tex">test-euenc.tex</a>).</p>
</li>
</ul>
<p>Advantages:</p>
<ul class="simple">
<li><p>Symbols from a Greek text font (e.g. the <a class="reference external" href="http://www.ctan.org/pkg/cbgreek-complete">CB fonts</a>) can be accessed
without the need for an explicite font-encoding switch anywhere in the
text.</p></li>
<li><p>Unicode input of Greek characters is supported</p>
<ul>
<li><p>via <tt class="literal"><span class="pre">\usepackage[utf8]{inputenc}</span></tt> and <tt class="literal">lgrenc.dfu</tt> from
<a class="reference external" href="http://www.ctan.org/pkg/greek-inputenc">greek-inputenc</a> for 8-bit TeX or XeTeX/LuaTeX in 8-bit compatibility
mode in any font encoding (see <a class="reference external" href="textalpha-test.tex">textalpha-test.tex</a>).</p></li>
<li><p>natively by XeTeX/LuaTeX for Unicode fonts. As <a class="reference external" href="http://www.ctan.org/pkg/inputenc">inputenc</a> does not work
with these engines, text input can be done via the Latin transcription
or LICR but <em>not via literal Unicode characters</em> for 8-bit font encodings
like LGR (see <a class="reference external" href="test-euenc.tex">test-euenc.tex</a>).</p></li>
</ul>
</li>
</ul>
<div class="attention">
<p class="admonition-title">Attention!</p>
<p>The macros work well in any font encoding for single symbols.
However, with 8-bit TeX engines, the automatic font-encoding switches
behind the doors interfere with kerning between letters and replacement
of accent+character with a pre-composed character.</p>
<p>Therefore, Greek text should be written with the help of <a class="reference external" href="http://www.ctan.org/pkg/babel">babel</a> or
<a class="reference external" href="http://www.ctan.org/pkg/polyglossia">polyglossia</a> (setting the language to <tt class="literal">greek</tt>) or wrapped in the
provided <tt class="literal">ensuregreek</tt> macro.  Using <a class="reference external" href="http://www.ctan.org/pkg/babel">babel</a> or <a class="reference external" href="http://www.ctan.org/pkg/polyglossia">polyglossia</a> also helps
to ensure correct hyphenation of Greek text.</p>
</div>
</div>
<div class="section" id="usage">
<h1>Usage</h1>
<pre class="code latex literal-block"><span class="keyword">\usepackage</span><span class="name builtin">{</span>textalpha<span class="name builtin">}</span>
</pre>
<p>For details see <a class="reference external" href="textalpha-test.tex">textalpha-test.tex</a> and <a class="reference external" href="textalpha-test.pdf">textalpha-test.pdf</a> (8-bit
TeX and XeTeX/LuaTeX in 8-bit compatibility mode) as well as
<a class="reference external" href="test-euenc.tex">test-euenc.tex</a> and <a class="reference external" href="test-euenc.pdf">test-euenc.pdf</a> (XeTeX/LuaTeX with Unicode
fonts).</p>
</div>
<div class="section" id="implementation">
<h1>Implementation</h1>
<div class="section" id="requirements">
<h2>Requirements</h2>
<p>With XeTeX or LuaTeX, there is one common input and font encoding –
Unicode. 8-bit TeX&nbsp;font&nbsp;encodings are only used in compatibility mode or for
fonts not available otherwise. For compatibility with the LaTeX font
selection system, the package <a class="reference external" href="http://www.ctan.org/pkg/euenc">euenc</a> defines the (pseudo) font encodings EU1
and EU2 for XeTeX and LuaTeX respectively. However euenc does not (yet)
define LICR macros. We therefore explicitely load Greek LICR definitions for
XeTeX/LuaTeX from <a class="reference external" href="greek-euenc.def.html">greek-euenc.def</a> which in turn
includes <a class="reference external" href="greek-fontenc.def.html">greek-fontenc.def</a>.</p>
<p>With 8-bit LaTeX, the LGR font encoding is used for Greek characters. If no
Greek-supporting font encoding (EU1, EU2, or LGR) is declared, LGR is loaded
and set up as default Greek font encoding by this package.</p>
<p>To give <tt class="literal">textalpha.sty</tt> a chance of finding out which font encodings are
used, load it after <a class="reference external" href="http://www.ctan.org/pkg/fontspec">fontspec</a> and/or <a class="reference external" href="http://www.ctan.org/pkg/fontenc">fontenc</a>.</p>
<div class="section" id="font-encodings">
<h3>Font encodings</h3>
<p>Ensure a Greek-supporting font encoding exists and supports Greek LICR
macros:</p>
<p>Load the Greek LICR definitions for Unicode if font encoding EU1 (XeTeX) or
EU2 (LuaTeX) is detected.<a class="footnote-reference" href="#eu" id="id1"><sup>1</sup></a> In an ideal world, this would be done in
the <tt class="literal">eu1enc.def</tt> (or <tt class="literal">eu2enc.def</tt>) file of the <a class="reference external" href="http://www.ctan.org/pkg/euenc">euenc</a> package. If none
of EU1, EU2, and LGR is declared, load <tt class="literal">lgrenc.def</tt>:</p>
<p>Re-set the <tt class="literal">\LastDeclaredEncoding</tt>: Because fontenc loads font
encoding definition files only once, it may happen that another font
encoding is defined afterwards — for example <a class="reference external" href="http://www.ctan.org/pkg/fontspec">fontspec</a> leaves
<tt class="literal">\LastDeclaredEncoding</tt> at <tt class="literal">T3</tt> (tipa), because it inputs the <a class="reference external" href="http://www.ctan.org/pkg/xunicode">xunicode</a>
package which in turn loads <tt class="literal">t3enc.def</tt>.</p>
<pre class="literal-block">\&#64;ifl&#64;aded{def}{eu1enc}{
  \renewcommand{\LastDeclaredEncoding}{EU1}
  \input{greek-euenc.def}
}{% else
  \&#64;ifl&#64;aded{def}{eu2enc}{
    \renewcommand{\LastDeclaredEncoding}{EU2}
    \input{greek-euenc.def}
  }{% else
    \&#64;ifl&#64;aded{def}{lgrenc}{
      % LGR already declared and set up
    }{
      \input{lgrenc.def}
    }
  }
}
</pre>
<dl class="footnote"><dt class="label"><a class="fn-backref" href="#id1">1</a></dt>
<dd id="eu">
<p class="first last">The two different (pseudo) font encodings allow different font setups for
XeTeX vs. LuaTeX using differently named <tt class="literal">*.fd</tt> files (see <a class="reference external" href="http://www.ctan.org/pkg/euenc">euenc</a> for
details).</p>
</dd>
</dl>
<p>The package <a class="reference external" href="http://www.ctan.org/pkg/hyperref">hyperref</a> defines the PU font encoding which also supports
(monotonic) Greek. It currently misses polytonic greek and the
<tt class="literal">\greekscript</tt> and <tt class="literal">\ensuregreek</tt> TextCommands:</p>
<pre class="literal-block">\&#64;ifl&#64;aded{def}{puenc}
  {\ProvideTextCommand{\greekscript}{PU}{}
   \ProvideTextCommand{\ensuregreek}{PU}[1]{#1}}
  {}
</pre>
</div>
</div>
<div class="section" id="default-declarations">
<h2>Default declarations</h2>
<p>The following definitions ensure that the Greek LICR macros can be used
anywhere in the document also with 8-bit TeX by declaring LGR as their
default font encoding. Abort here, if another Greek-supporting
font encoding is used instead of LGR:</p>
<pre class="literal-block">\&#64;ifl&#64;aded{def}{lgrenc}
  {\renewcommand{\LastDeclaredEncoding}{LGR}}
  {\expandafter\endinput} % &quot;return&quot;
</pre>
<div class="section" id="greekscript-ensuregreek">
<h3>greekscript, ensuregreek</h3>
<p>The <tt class="literal">\greekscript</tt> declaration ensures the current font encoding supports
the Greek script. <tt class="literal"><span class="pre">greek-fontenc.def</span></tt> sets this to the empty declaration
for font encodings that do so. This is currently used by <tt class="literal">lgrenc.def</tt>
(LGR) and <tt class="literal"><span class="pre">greek-euenc.def</span></tt> (Greek LICR macros for EU1 and EU2).</p>
<p>We define LGR as default encoding for Greek text. We use
<tt class="literal">\ProvideTextCommandDefault</tt> to enable the author or other packages to use
an alternative definition (see [<a class="reference external" href="http://www.ctan.org/tex-archive/macros/latex/doc/fntguide.pdf">fntguide</a>]):</p>
<pre class="literal-block">\ProvideTextCommandDefault{\greekscript}{\fontencoding{LGR}\selectfont}
</pre>
<p>The <tt class="literal">\ensuregreek</tt> command can be used to ensure that its argument is set in
a font encoding with support for Greek. Again the default is LGR:</p>
<pre class="literal-block">\ProvideTextCommandDefault{\ensuregreek}[1]{\leavevmode{\greekscript #1}}
</pre>
<!-- The [fntguide_] writes

  Note that ``\DeclareTextAccentDefault`` can be used on any
  one-argument encoding-specific command, not just those defined with
  ``\DeclareTextAccent``.

However, the simpler alternative
``\DeclareTextAccentDefault{\ensuregreek}{LGR}`` fails with the table of
Unicode characters in the test document `<textalpha-test.tex>`__:

  ``! You can't use a prefix with `end-group character }'.`` -->
<p>Eventually, all font encodings supporting Greek script (e.g. LGI, PU, EU1,
EU2) will declare <tt class="literal">\ensuregreek</tt> as text command that passes the argument
unchanged. This way, kerning and selection of precomposed glyphs would work
also for cases like <tt class="literal"><span class="pre">\ensuregreek{\'A}U</span></tt>.</p>
</div>
<div class="section" id="greek-alphabet">
<h3>Greek Alphabet</h3>
<p>Define the <tt class="literal">text*</tt> marcos as default for all font encodings:</p>
<pre class="literal-block">\DeclareTextSymbolDefault{\textAlpha}{LGR}
\DeclareTextSymbolDefault{\textBeta}{LGR}
\DeclareTextSymbolDefault{\textGamma}{LGR}
\DeclareTextSymbolDefault{\textDelta}{LGR}
\DeclareTextSymbolDefault{\textEpsilon}{LGR}
\DeclareTextSymbolDefault{\textZeta}{LGR}
\DeclareTextSymbolDefault{\textEta}{LGR}
\DeclareTextSymbolDefault{\textTheta}{LGR}
\DeclareTextSymbolDefault{\textIota}{LGR}
\DeclareTextSymbolDefault{\textKappa}{LGR}
\DeclareTextSymbolDefault{\textLambda}{LGR}
\DeclareTextSymbolDefault{\textMu}{LGR}
\DeclareTextSymbolDefault{\textNu}{LGR}
\DeclareTextSymbolDefault{\textXi}{LGR}
\DeclareTextSymbolDefault{\textOmicron}{LGR}
\DeclareTextSymbolDefault{\textPi}{LGR}
\DeclareTextSymbolDefault{\textRho}{LGR}
\DeclareTextSymbolDefault{\textSigma}{LGR}
\DeclareTextSymbolDefault{\textTau}{LGR}
\DeclareTextSymbolDefault{\textUpsilon}{LGR}
\DeclareTextSymbolDefault{\textPhi}{LGR}
\DeclareTextSymbolDefault{\textChi}{LGR}
\DeclareTextSymbolDefault{\textPsi}{LGR}
\DeclareTextSymbolDefault{\textOmega}{LGR}
%
\DeclareTextSymbolDefault{\textalpha}{LGR}
\DeclareTextSymbolDefault{\textbeta}{LGR}
\DeclareTextSymbolDefault{\textgamma}{LGR}
\DeclareTextSymbolDefault{\textdelta}{LGR}
\DeclareTextSymbolDefault{\textepsilon}{LGR}
\DeclareTextSymbolDefault{\textzeta}{LGR}
\DeclareTextSymbolDefault{\texteta}{LGR}
\DeclareTextSymbolDefault{\texttheta}{LGR}
\DeclareTextSymbolDefault{\textiota}{LGR}
\DeclareTextSymbolDefault{\textkappa}{LGR}
\DeclareTextSymbolDefault{\textlambda}{LGR}
\DeclareTextSymbolDefault{\textmu}{LGR}
\DeclareTextSymbolDefault{\textnu}{LGR}
\DeclareTextSymbolDefault{\textxi}{LGR}
\DeclareTextSymbolDefault{\textomicron}{LGR}
\DeclareTextSymbolDefault{\textpi}{LGR}
\DeclareTextSymbolDefault{\textrho}{LGR}
\DeclareTextSymbolDefault{\textsigma}{LGR}
\DeclareTextSymbolDefault{\textvarsigma}{LGR}
\DeclareTextSymbolDefault{\textfinalsigma}{LGR} % alias for \textvarsigma
\DeclareTextSymbolDefault{\textautosigma}{LGR}  % char 115 in LGR
\DeclareTextSymbolDefault{\texttau}{LGR}
\DeclareTextSymbolDefault{\textupsilon}{LGR}
\DeclareTextSymbolDefault{\textphi}{LGR}
\DeclareTextSymbolDefault{\textchi}{LGR}
\DeclareTextSymbolDefault{\textpsi}{LGR}
\DeclareTextSymbolDefault{\textomega}{LGR}
</pre>
<div class="section" id="additional-greek-symbols">
<h4>Additional Greek symbols</h4>
<p>Including alias names for compatibility with hyperref’s puenc.def.</p>
<p>Ancient Greek Numbers (Athenian Numerals):</p>
<pre class="literal-block">\DeclareTextSymbolDefault{\textpentedeka}{LGR}    % GREEK ACROPHONIC ATTIC FIFTY
\DeclareTextSymbolDefault{\textpentehekaton}{LGR} % GREEK ACROPHONIC ATTIC FIVE HUNDRED
\DeclareTextSymbolDefault{\textpenteqilioi}{LGR}  % GREEK ACROPHONIC ATTIC FIVE THOUSAND
\DeclareTextSymbolDefault{\textpentemurioi}{LGR}  % GREEK ACROPHONIC ATTIC FIFTY THOUSAND
</pre>
<p>Archaic letters:</p>
<pre class="literal-block">\DeclareTextSymbolDefault{\textstigma}{LGR}      % ϛ
\DeclareTextSymbolDefault{\textstigmagreek}{LGR} % ϛ (puenc.def)
\DeclareTextSymbolDefault{\textvarstigma}{LGR}   % stigma variant
\DeclareTextSymbolDefault{\textkoppa}{LGR}       % ϟ (greek small letter koppa)
\DeclareTextSymbolDefault{\textkoppagreek}{LGR}  % ϟ (puenc.def)
\DeclareTextSymbolDefault{\textqoppa}{LGR}       % ϙ (archaic koppa)
\DeclareTextSymbolDefault{\textQoppa}{LGR}       % Ϙ (archaic Koppa)
\DeclareTextSymbolDefault{\textStigma}{LGR}      % Ϛ ϹΤ ligature in some fonts
\DeclareTextSymbolDefault{\textStigmagreek}{LGR} % Ϛ (puenc.def)
\DeclareTextSymbolDefault{\textSampi}{LGR}       % Ϡ
\DeclareTextSymbolDefault{\textSampigreek}{LGR}  % Ϡ (puenc.def)
\DeclareTextSymbolDefault{\textsampi}{LGR}       % ϡ
\DeclareTextSymbolDefault{\textsampigreek}{LGR}  % ϡ (puenc.def)
\DeclareTextSymbolDefault{\textanoteleia}{LGR}   % ·
\DeclareTextSymbolDefault{\texterotimatiko}{LGR} % ; (003B is the preferred character)
\DeclareTextSymbolDefault{\textdigamma}{LGR}     % ϝ
\DeclareTextSymbolDefault{\textDigamma}{LGR}     % Ϝ
\DeclareTextSymbolDefault{\textdigammagreek}{LGR} % ϝ (puenc.def)
\DeclareTextSymbolDefault{\textDigammagreek}{LGR} % Ϝ (puenc.def)
</pre>
<p>numeral signs: <a class="reference external" href="http://en.wikipedia.org/wiki/Greek_numerals">http://en.wikipedia.org/wiki/Greek_numerals</a></p>
<pre class="literal-block">\DeclareTextSymbolDefault{\textnumeralsigngreek}{LGR}      % (puenc.def)
\DeclareTextSymbolDefault{\textnumeralsignlowergreek}{LGR} % (puenc.def)
</pre>
</div>
</div>
<div class="section" id="diacritics">
<h3>Diacritics</h3>
<p>Greek diacritics via “named” macros:</p>
<pre class="literal-block">\DeclareTextAccentDefault{\accdasia}{LGR}
\DeclareTextAccentDefault{\accpsili}{LGR}
\DeclareTextAccentDefault{\acctonos}{LGR}
\DeclareTextAccentDefault{\accvaria}{LGR}
\DeclareTextAccentDefault{\accperispomeni}{LGR}
\DeclareTextAccentDefault{\accdialytika}{LGR}
\DeclareTextAccentDefault{\&lt;}{LGR}
\DeclareTextAccentDefault{\&gt;}{LGR}
%
\DeclareTextAccentDefault{\accdasiaoxia}{LGR}
\DeclareTextAccentDefault{\accdasiavaria}{LGR}
\DeclareTextAccentDefault{\accdasiaperispomeni}{LGR}
\DeclareTextAccentDefault{\accpsilioxia}{LGR}
\DeclareTextAccentDefault{\accpsilivaria}{LGR}
\DeclareTextAccentDefault{\accpsiliperispomeni}{LGR}
\DeclareTextAccentDefault{\accdialytikatonos}{LGR}
\DeclareTextAccentDefault{\accdialytikavaria}{LGR}
\DeclareTextAccentDefault{\accdialytikaperispomeni}{LGR}
</pre>
<p>Postfix accents:</p>
<pre class="literal-block">\DeclareTextSymbolDefault{\ypogegrammeni}{LGR} % &quot;small&quot; sub-iota
\DeclareTextSymbolDefault{\prosgegrammeni}{LGR}  % &quot;capital&quot; sub-iota
</pre>
<p>Other accents in LGR:</p>
<pre class="literal-block">\DeclareTextAccentDefault{\accinvertedbrevebelow}{LGR} % INVERTED BREVE BELOW
\DeclareTextAccentDefault{\textsubarch}{LGR}           % tipa, Teubner name: ut
\DeclareTextAccentDefault{\accbrevebelow}{LGR}         % BREVE BELOW
</pre>
</div>
<div class="section" id="auxiliary-macros">
<h3>Auxiliary macros</h3>
<p><tt class="literal">\MakeUppercase</tt> requires two internal commands:</p>
<pre class="literal-block">\DeclareTextAccentDefault{\LGR&#64;hiatus}{LGR}
\DeclareTextAccentDefault{\LGR&#64;Dialytika}{LGR}
</pre>
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