%%%========================================================================
%%% @TeX-font-encoding-file{
%%%    author              = "Alan Jeffrey",
%%%    version             = "1.504",
%%%    date                = "23 January 1996",
%%%    time                = "14:11:12 GMT",
%%%    filename            = "ot1.etx",
%%%    address             = "School of Cognitive and Computing Sciences
%%%                           University of Sussex
%%%                           Brighton BN1 9QH
%%%                           UK",
%%%    FAX                 = "+44 273 678188",
%%%    email               = "alanje@cogs.sussex.ac.uk",
%%%    codetable           = "ISO/ASCII",
%%%    keywords            = "encoding, Cork, TeX, PostScript",
%%%    supported           = "yes",
%%%    abstract            = "This is the TeX text encoding as a TeX font 
%%%                           encoding file, for use with the fontinst 
%%%                           font installation package.",
%%%    package             = "fontinst",
%%%    dependencies        = "fontdoc.sty, ltugboat.sty",
%%% }
%%%========================================================================

\relax

\documentstyle[fontdoc,twocolumn]{article}

\title{The \TeX\ text encoding vector}
\author{Alan Jeffrey}
\date{23 January 1996 \\
Version 1.401

%\address{School of Cognitive and Computing Sciences \\
%   University of Sussex \\
%   Falmer \\
%   Brighton \\
%   BN1 9QH \\
%   UK}
%\netaddress{alanje@cogs.susx.ac.uk}

\begin{document}

\maketitle

\section{Introduction}

This document describes the \TeX\ text (ot1) encoding.

To use this encoding, you should define the following macros:
\begin{itemize}

\item \verb|\lc{A}{a}| should return the name of a lower-case
   glyph, for example `{\tt a}' or `{\tt Asmall}'.

\item \verb|\uc{A}{a}| should return the name of an upper-case
   glyph, for example `{\tt A}' or `{\tt Amedium}'.

\item \verb|\lclig{FI}{fi}| should return the name of a lower-case
   ligature, for example `{\tt fi}' or `{\tt FIsmall}'.

\item \verb|\uclig{FI}{fi}| should return the name of an upper-case
   ligature, for example `{\tt FI}' or `{\tt FImedium}'.

\item \verb|\digit{zero}| should return the name of a digit, for
   example `{\tt zero}' or `{\tt zerooldstyle}'.

\item \verb|\tty| should be `y' if the encoding is \TeX\ typewriter 
   (cmtt) encoding, and `n' otherwise.
   
\item \verb|\currency| should be the name of the currency glyph, either 
   `sterling' or `dollar'.
   
\end{itemize}
These should all expand in the mouth, otherwise you may get error
messages!
For example, to get the standard upper and lower case font, you should
define: 
\begin{verbatim}
   \setcommand\lc#1#2{#2}
   \setcommand\uc#1#2{#1}
   \setcommand\lclig#1#2{#2}
   \setcommand\uclig#1#2{#1}
   \setcommand\digit#1{#1}
   \setcommand\tty{n}
   \setcommand\currency{dollar}
\end{verbatim}
To get a caps and small caps font with old style digits and letter
spacing, you should define: 
\begin{verbatim}
   \setcommand\lc#1#2{#1small}
   \setcommand\uc#1#2{#1}
   \setcommand\lclig#1#2{#2small}
   \setcommand\uclig#1#2{#1spaced}
   \setcommand\digit#1{#1oldstyle}
   \setcommand\tty{n}
   \setcommand\currency{dollar}
\end{verbatim}
To get an all-caps font with medium-cap composite letters and letter
spacing, you should define: 
\begin{verbatim}
   \setcommand\lc#1#2{#1}
   \setcommand\uc#1#2{#1}
   \setcommand\lclig#1#2{#1spaced}
   \setcommand\uclig#1#2{#1spaced}
   \setcommand\digit#1{#1}
   \setcommand\tty{n}
   \setcommand\currency{dollar}
\end{verbatim}
This document describes the upper and lower case encoding.

\encoding

\needsfontinstversion{1.327}

\comment{\section{Default values}}

\setcommand\lc#1#2{#2}
\setcommand\uc#1#2{#1}
\setcommand\lclig#1#2{#2}
\setcommand\uclig#1#2{#1}
\setcommand\digit#1{#1}
\ifisint{monowidth}\then
   \setcommand\tty{y}
\else
   \setcommand\tty{n}
\fi
\setcommand\currency{dollar}

\if \tty y
   \setstr{codingscheme}{TEX TYPEWRITER TEXT}
\else
   \setstr{codingscheme}{TEX TEXT}
\fi

\setint{italicslant}{0}

\setint{xheight}{
   \ifisglyph{x}\then
      \height{x}
   \else
      0
   \fi
}

\setint{interword}{
   \ifisglyph{space}\then
      \width{space}
   \else
      0
   \fi
}

\comment{\section{Default font dimensions}}

\setint{fontdimen(1)}{\int{italicslant}}              % italic slant
\setint{fontdimen(2)}{\int{interword}}                % interword space
\ifisint{monowidth}\then
   \setint{fontdimen(3)}{0}                           % interword stretch
   \setint{fontdimen(4)}{0}                           % interword shrink
\else
   \setint{fontdimen(3)}{\scale{\int{interword}}{600}}% interword stretch
   \setint{fontdimen(4)}{\scale{\int{interword}}{240}}% interword shrink
\fi   
\setint{fontdimen(5)}{\int{xheight}}                  % x-height
\setint{fontdimen(6)}{1000}                           % quad
\ifisint{monowidth}\then
   \setint{fontdimen(7)}{\int{interword}}             % extra space after .
\else
   \setint{fontdimen(7)}{\scale{\int{interword}}{240}}% extra space after .
\fi

\comment{\section{The encoding}
   There are 130 glyphs in this encoding.  128 of these are in Knuth's CM 
   encoding, and the other two are `\l' and `\L', which are composite 
   letters in CM, but are single glyphs in almost every other font.}

\setslot{Gamma}
   \comment{The greek letter `$\Gamma$'.}
\endsetslot

\setslot{Delta}
   \comment{The greek letter `$\Delta$'.}
\endsetslot

\setslot{Theta}
   \comment{The greek letter `$\Theta$'.}
\endsetslot

\setslot{Lambda}
   \comment{The greek letter `$\Lambda$'.}
\endsetslot

\setslot{Xi}
   \comment{The greek letter `$\Xi$'.}
\endsetslot

\setslot{Pi}
   \comment{The greek letter `$\Pi$'.}
\endsetslot

\setslot{Sigma}
   \comment{The greek letter `$\Sigma$'.}
\endsetslot

\setslot{Upsilon1}
   \comment{The greek letter `$\Upsilon$'.}
\endsetslot

\setslot{Phi}
   \comment{The greek letter `$\Phi$'.}
\endsetslot

\setslot{Psi}
   \comment{The greek letter `$\Psi$'.}
\endsetslot

\setslot{Omega}
   \comment{The greek letter `$\Omega$'.}
\endsetslot

\if \tty y

\setslot{arrowup}
   \comment{An upwards-facing arrow `$\uparrow$'.}
\endsetslot

\setslot{arrowdown}
   \comment{A downwards-facing arrow `$\downarrow$'.}
\endsetslot

\setslot{quotesingle}
   \comment{The `neutral' single quotation mark `{\tt\char`\'}', for use 
      with monowidth fonts.}
\endsetslot

\setslot{exclamdown}
   \comment{The Spanish punctuation mark `!`'.}
\endsetslot

\setslot{questiondown}
   \comment{The Spanish punctuation mark `?`'.}
\endsetslot

\else

\setslot{\lclig{FF}{ff}}
   \ligature{LIG}{\lc{I}{i}}{\lclig{FFI}{ffi}}
   \ligature{LIG}{\lc{L}{l}}{\lclig{FFL}{ffl}}
   \comment{The `ff' ligature.  It should be two characters wide in a 
      monowidth font.}
\endsetslot

\setslot{\lclig{FI}{fi}}
   \comment{The `fi' ligature.  It should be two characters wide in a 
      monowidth font.}
\endsetslot

\setslot{\lclig{FL}{fl}}
   \comment{The `fl' ligature.  It should be two characters wide in a 
      monowidth font.}
\endsetslot

\setslot{\lclig{FFI}{ffi}}
   \comment{The `ffi' ligature.  It should be three characters wide in a 
      monowidth font.}
\endsetslot

\setslot{\lclig{FFL}{ffl}}
   \comment{The `ffl' ligature.  It should be three characters wide in a 
      monowidth font.}
\endsetslot

\fi

\setslot{\lc{dotlessI}{dotlessi}}
   \comment{A dotless i `\i', used to produce accented letters such as 
      `\=\i'.}
\endsetslot

\setslot{\lc{dotlessJ}{dotlessj}}
   \comment{A dotless j `\j', used to produce accented letters such as 
      `\=\j'.  Most non-\TeX\ fonts do not have this glyph.}
\endsetslot

\setslot{grave}
   \comment{The grave accent `\`a'.}
\endsetslot

\setslot{acute}
   \comment{The acute accent `\'a'.}
\endsetslot

\setslot{caron}
   \comment{The caron or h\'a\v cek accent `\v a'.}
\endsetslot

\setslot{breve}
   \comment{The breve accent `\u a'.}
\endsetslot

\setslot{macron}
   \comment{The macron accent `\=a'.}
\endsetslot

\setslot{ringfitted}
   \comment{The ring accent `\aa', fitted to be the same width as an
      upper case `A'.}
\endsetslot

\setslot{cedilla}
   \comment{The cedilla accent `\c a'.}
\endsetslot

\setslot{\lc{SS}{germandbls}}
   \comment{The letter `\ss'.}
\endsetslot

\setslot{\lc{AE}{ae}}
   \comment{The letter `\ae'.  This is a single letter, and should not be 
      faked with `ae'.}
\endsetslot

\setslot{\lc{OE}{oe}}
   \comment{The letter `\oe'.  This is a single letter, and should not be 
      faked with `oe'.}
\endsetslot

\setslot{\lc{Oslash}{oslash}}
   \comment{The letter `\o'.}
\endsetslot

\setslot{\uc{AE}{ae}}
   \comment{The letter `\AE'.  This is a single letter, and should not be 
      faked with `AE'.}
\endsetslot

\setslot{\uc{OE}{oe}}
   \comment{The letter `\OE'.  This is a single letter, and should not be 
      faked with `OE'.}
\endsetslot

\setslot{\uc{Oslash}{oslash}}
   \comment{The letter `\o'.}
\endsetslot
 
\if \tty y

\setslot{visiblespace}
   \comment{A visible space glyph `{\tt\char`\ }'.}
\endsetslot

\else

\setslot{lslashslash}
   \ligature{LIG}{\lc{L}{l}}{\lc{Lslash}{lslash}}
   \ligature{LIG}{\uc{L}{l}}{\uc{Lslash}{lslash}}
   \comment{The slash used to make `\l' and `\L'.  Since most fonts do
      not have a separate glyph for this, I've added ligatures to `\l'
      and `\L'.}
\endsetslot

\fi

\setslot{exclam}
   \ligature{LIG}{quoteleft}{exclamdown}
   \comment{The exclamation mark `!'.}
\endsetslot

\if \tty y

\setslot{quotedbl}
   \comment{The `neutral' quotation mark `{\tt\char`\"}', included for 
      use in monowidth fonts, or for setting computer programs.}
\endsetslot

\else

\setslot{quotedblright}
   \comment{An English double closing quote mark `\,''\,'.}
\endsetslot

\fi

\setslot{numbersign}
   \comment{The hash sign `\#'.}
\endsetslot

\setslot{\currency}
   \comment{Either the dollar sign `\$' or the pound sign `\pounds', 
      depending on the font.}
\endsetslot

\setslot{percent}
   \comment{The percent sign `\%'.}
\endsetslot

\setslot{ampersand}
   \comment{The ampersand sign `\&'.}
\endsetslot

\setslot{quoteright}
   \if \tty y \else \ligature{LIG}{quoteright}{quotedblright} \fi
   \comment{The English closing quotation mark `\,'\,'.}
\endsetslot

\setslot{parenleft}
   \comment{The opening parenthesis `('.}
\endsetslot

\setslot{parenright}
   \comment{The closing parenthesis `)'.}
\endsetslot

\setslot{asterisk}
   \comment{The raised asterisk `*'.}
\endsetslot

\setslot{plus}
   \comment{The addition sign `+'.}
\endsetslot

\setslot{comma}
   \comment{The comma `,'.}
\endsetslot

\setslot{hyphen}
   \if \tty y \else \ligature{LIG}{hyphen}{rangedash} \fi
   \comment{The hyphen `-'.}
\endsetslot

\setslot{period}
   \comment{The full point `.'.}
\endsetslot

\setslot{slash}
   \comment{The forward oblique `/'.}
\endsetslot

\setslot{\digit{zero}}
   \comment{The number zero `0'.  This (and all the other numerals) may be 
      old style or ranging digits.}
\endsetslot

\setslot{\digit{one}}
   \comment{The number one `1'.}
\endsetslot

\setslot{\digit{two}}
   \comment{The number two `2'.}
\endsetslot

\setslot{\digit{three}}
   \comment{The number three `3'.}
\endsetslot

\setslot{\digit{four}}
   \comment{The number four `4'.}
\endsetslot

\setslot{\digit{five}}
   \comment{The number five `5'.}
\endsetslot

\setslot{\digit{six}}
   \comment{The number six `6'.}
\endsetslot

\setslot{\digit{seven}}
   \comment{The number seven `7'.}
\endsetslot

\setslot{\digit{eight}}
   \comment{The number eight `8'.}
\endsetslot

\setslot{\digit{nine}}
   \comment{The number nine `9'.}
\endsetslot

\setslot{colon}
   \comment{The colon punctuation mark `:'.}
\endsetslot

\setslot{semicolon}
   \comment{The semi-colon punctuation mark `;'.}
\endsetslot

\if \tty y

\setslot{less}
   \comment{The less-than sign `$<$'.}
\endsetslot

\setslot{equal}
   \comment{The equals sign `='.}
\endsetslot

\setslot{greater}
   \comment{The greater-than sign `$>$'.}
\endsetslot

\else

\setslot{exclamdown}
   \comment{The Spanish punctuation mark `!`'.}
\endsetslot

\setslot{equal}
   \comment{The equals sign `='.}
\endsetslot

\setslot{questiondown}
   \comment{The Spanish punctuation mark `?`'.}
\endsetslot

\fi

\setslot{question}
   \ligature{LIG}{quoteleft}{questiondown}
   \comment{The question mark `?'.}
\endsetslot

\setslot{at}
   \comment{The at sign `@'.}
\endsetslot

\setslot{\uc{A}{a}}
   \comment{The letter `{A}'.}
\endsetslot

\setslot{\uc{B}{b}}
   \comment{The letter `{B}'.}
\endsetslot

\setslot{\uc{C}{c}}
   \comment{The letter `{C}'.}
\endsetslot

\setslot{\uc{D}{d}}
   \comment{The letter `{D}'.}
\endsetslot

\setslot{\uc{E}{e}}
   \comment{The letter `{E}'.}
\endsetslot

\setslot{\uc{F}{f}}
   \comment{The letter `{F}'.}
\endsetslot

\setslot{\uc{G}{g}}
   \comment{The letter `{G}'.}
\endsetslot

\setslot{\uc{H}{h}}
   \comment{The letter `{H}'.}
\endsetslot

\setslot{\uc{I}{i}}
   \comment{The letter `{I}'.}
\endsetslot

\setslot{\uc{J}{j}}
   \comment{The letter `{J}'.}
\endsetslot

\setslot{\uc{K}{k}}
   \comment{The letter `{K}'.}
\endsetslot

\setslot{\uc{L}{l}}
   \comment{The letter `{L}'.}
\endsetslot

\setslot{\uc{M}{m}}
   \comment{The letter `{M}'.}
\endsetslot

\setslot{\uc{N}{n}}
   \comment{The letter `{N}'.}
\endsetslot

\setslot{\uc{O}{o}}
   \comment{The letter `{O}'.}
\endsetslot

\setslot{\uc{P}{p}}
   \comment{The letter `{P}'.}
\endsetslot

\setslot{\uc{Q}{q}}
   \comment{The letter `{Q}'.}
\endsetslot

\setslot{\uc{R}{r}}
   \comment{The letter `{R}'.}
\endsetslot

\setslot{\uc{S}{s}}
   \comment{The letter `{S}'.}
\endsetslot

\setslot{\uc{T}{t}}
   \comment{The letter `{T}'.}
\endsetslot

\setslot{\uc{U}{u}}
   \comment{The letter `{U}'.}
\endsetslot

\setslot{\uc{V}{v}}
   \comment{The letter `{V}'.}
\endsetslot

\setslot{\uc{W}{w}}
   \comment{The letter `{W}'.}
\endsetslot

\setslot{\uc{X}{x}}
   \comment{The letter `{X}'.}
\endsetslot

\setslot{\uc{Y}{y}}
   \comment{The letter `{Y}'.}
\endsetslot

\setslot{\uc{Z}{z}}
   \comment{The letter `{Z}'.}
\endsetslot

\setslot{bracketleft}
   \comment{The opening square bracket `['.}
\endsetslot

\if \tty y

\setslot{backslash}
   \comment{The backwards oblique `$\backslash$'.}
\endsetslot

\else

\setslot{quotedblleft}
   \comment{An English double opening quote mark `\,``\,'.}
\endsetslot

\fi

\setslot{bracketright}
   \comment{The closing square bracket `]'.}
\endsetslot

\setslot{circumflex}
   \comment{The circumflex accent `\^ a'.}
\endsetslot

\if \tty y

\setslot{underscore}
   \comment{The ASCII underline character `{\tt\char`\_}', usually set on 
      the baseline.}
\endsetslot

\else

\setslot{dotaccent}
   \comment{The dot accent `\.a'.}
\endsetslot

\fi

\setslot{quoteleft}
   \if \tty y \else \ligature{LIG}{quoteleft}{quotedblleft} \fi
   \comment{The English opening single quotation mark `\,`\,'.}
\endsetslot

\setslot{\lc{A}{a}}
   \comment{The letter `{a}'.}
\endsetslot

\setslot{\lc{B}{b}}
   \comment{The letter `{b}'.}
\endsetslot

\setslot{\lc{C}{c}}
   \comment{The letter `{c}'.}
\endsetslot

\setslot{\lc{D}{d}}
   \comment{The letter `{d}'.}
\endsetslot

\setslot{\lc{E}{e}}
   \comment{The letter `{e}'.}
\endsetslot

\setslot{\lc{F}{f}}
\if \tty y \else
   \ligature{LIG}{\lc{I}{i}}{\lclig{FI}{fi}}
   \ligature{LIG}{\lc{F}{f}}{\lclig{FF}{ff}}
   \ligature{LIG}{\lc{L}{l}}{\lclig{FL}{fl}}
\fi
   \comment{The letter `{f}'.}   
\endsetslot

\setslot{\lc{G}{g}}
   \comment{The letter `{g}'.}
\endsetslot

\setslot{\lc{H}{h}}
   \comment{The letter `{h}'.}
\endsetslot

\setslot{\lc{I}{i}}
   \comment{The letter `{i}'.}
\endsetslot

\setslot{\lc{J}{j}}
   \comment{The letter `{j}'.}
\endsetslot

\setslot{\lc{K}{k}}
   \comment{The letter `{k}'.}
\endsetslot

\setslot{\lc{L}{l}}
   \comment{The letter `{l}'.}
\endsetslot

\setslot{\lc{M}{m}}
   \comment{The letter `{m}'.}
\endsetslot

\setslot{\lc{N}{n}}
   \comment{The letter `{n}'.}
\endsetslot

\setslot{\lc{O}{o}}
   \comment{The letter `{o}'.}
\endsetslot

\setslot{\lc{P}{p}}
   \comment{The letter `{p}'.}
\endsetslot

\setslot{\lc{Q}{q}}
   \comment{The letter `{q}'.}
\endsetslot

\setslot{\lc{R}{r}}
   \comment{The letter `{r}'.}
\endsetslot

\setslot{\lc{S}{s}}
   \comment{The letter `{s}'.}
\endsetslot

\setslot{\lc{T}{t}}
   \comment{The letter `{t}'.}
\endsetslot

\setslot{\lc{U}{u}}
   \comment{The letter `{u}'.}
\endsetslot

\setslot{\lc{V}{v}}
   \comment{The letter `{v}'.}
\endsetslot

\setslot{\lc{W}{w}}
   \comment{The letter `{w}'.}
\endsetslot

\setslot{\lc{X}{x}}
   \comment{The letter `{x}'.}
\endsetslot

\setslot{\lc{Y}{y}}
   \comment{The letter `{y}'.}
\endsetslot

\setslot{\lc{Z}{z}}
   \comment{The letter `{z}'.}
\endsetslot

\if \tty y

\setslot{braceleft}
   \comment{The opening curly brace `\{'.}
\endsetslot

\setslot{bar}
   \comment{The ASCII vertical bar `$|$'.  This is 
      included for compatibility with typewriter fonts used for computer 
      listings.}
\endsetslot

\setslot{braceright}
   \comment{The closing curly brace `\}'.}
\endsetslot

\else

\setslot{rangedash}
   \if \tty y \else \ligature{LIG}{hyphen}{punctdash} \fi
   \comment{The number range dash `1--9'.  In a monowidth font, this 
      might be set as `{\tt 1{-}9}'.}
\endsetslot

\setslot{punctdash}
   \comment{The punctuation dash `Oh---boy.'  In a monowidth font, this 
      might be set as `{\tt Oh{-}{-}boy.}'}
\endsetslot

\setslot{hungarumlaut}
   \comment{The long Hungarian umlaut `\H a'.}
\endsetslot

\fi

\setslot{tilde}
   \comment{The tilde accent `\~a'.}
\endsetslot

\setslot{dieresis}
   \comment{The umlaut or dieresis accent `\"a'.}
\endsetslot

\comment{
   \section{Non-standard ligatures}
   The `\l' and `\L' glyphs are not usually in the ot1 encoding, but
   they're needed for fonts which don't have a special `lslashslash'
   glyph.
}

\nextslot{"8A}

\setslot{\uc{Lslash}{lslash}}
   \comment{The letter `\L'.}
\endsetslot

\nextslot{"AA}

\setslot{\lc{Lslash}{lslash}}
   \comment{The letter `\l'.}
\endsetslot

\endencoding

\end{document}