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+% \iffalse meta-comment % -*- LaTeX -*-
+%       rcsid = @(#)$Id: songbook.dtx,v 1.11 2003/09/23 01:18:57 christopher Exp $
+%
+%
+%       songbook.sty - Generic SongBook style.
+%
+%       Version 4.1a, 31 August, 2003
+%
+%       Copyright 1992--2003 Christopher Rath <christopher@rath.ca>
+%
+%       This package is free software; you can redistribute it and/or
+%       modify it under the terms of the GNU Lesser General Public
+%       License as published by the Free Software Foundation; either
+%       version 2.1 of the License, or (at your option) any later
+%       version.
+%
+%       This package is distributed in the hope that it will be
+%       useful, but WITHOUT ANY WARRANTY; without even the implied
+%       warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+%       PURPOSE.  See the GNU Lesser General Public License for more
+%       details.
+%
+% \fi
+%
+% \CheckSum{2112}
+%% \CharacterTable
+%%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
+%%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
+%%   Digits        \0\1\2\3\4\5\6\7\8\9
+%%   Exclamation   \!     Double quote  \"     Hash (number) \#
+%%   Dollar        \$     Percent       \%     Ampersand     \&
+%%   Acute accent  \'     Left paren    \(     Right paren   \)
+%%   Asterisk      \*     Plus          \+     Comma         \,
+%%   Minus         \-     Point         \.     Solidus       \/
+%%   Colon         \:     Semicolon     \;     Less than     \<
+%%   Equals        \=     Greater than  \>     Question mark \?
+%%   Commercial at \@     Left bracket  \[     Backslash     \\
+%%   Right bracket \]     Circumflex    \^     Underscore    \_
+%%   Grave accent  \`     Left brace    \{     Vertical bar  \|
+%%   Right brace   \}     Tilde         \~}
+%%
+%\iffalse    This is a METACOMMENT
+%           Everything up to the next `\ fi' (without a blank) will
+%           be ignored.  This is necessary because `%' may no longer
+%           be a comment mark when this file is read in.
+%           
+% Version:     Date:     Changes:
+%
+%  4.0 and earlier...    are not documented in this file.
+%  \changes{v4.1}{2003/08/31}{Added an optional parameter to the \textsf{song}
+%			environment along with a corresponding usepackage option.}
+%  \changes{v4.1a}{2003/09/22}{Corrected a bug whereby the new exclude song mode
+%			was throwing an error when the \textsf{SBRef} and
+%			\textsf{SBMargNote} commands were used.}
+%\fi
+%
+% \hyphenation{make-index}
+% 
+% \DoNotIndex{\@,\@@par,\@beginparpenalty,\@empty}
+% \DoNotIndex{\@flushglue,\@gobble,\@input}
+% \DoNotIndex{\@makefnmark,\@makeother,\@maketitle}
+% \DoNotIndex{\@namedef,\@ne,\@spaces,\@tempa}
+% \DoNotIndex{\@tempb,\@tempswafalse,\@tempswatrue}
+% \DoNotIndex{\@thanks,\@thefnmark,\@topnum}
+% \DoNotIndex{\@@,\@elt,\@forloop,\@fortmp,\@gtempa,\@totalleftmargin}
+% \DoNotIndex{\",\/,\@ifundefined,\@nil,\@verbatim,\@vobeyspaces}
+% \DoNotIndex{\|,\~,\ ,\active,\advance,\aftergroup,\begingroup,\bgroup}
+% \DoNotIndex{\mathcal,\csname,\def,\documentstyle,\dospecials,\edef}
+% \DoNotIndex{\egroup}
+% \DoNotIndex{\else,\endcsname,\endgroup,\endinput,\endtrivlist}
+% \DoNotIndex{\expandafter,\fi,\fnsymbol,\futurelet,\gdef,\global}
+% \DoNotIndex{\hbox,\hss,\if,\if@inlabel,\if@tempswa,\if@twocolumn}
+% \DoNotIndex{\ifcase}
+% \DoNotIndex{\ifcat,\iffalse,\ifx,\ignorespaces,\index,\input,\item}
+% \DoNotIndex{\jobname,\kern,\leavevmode,\leftskip,\let,\llap,\lower}
+% \DoNotIndex{\m@ne,\next,\newpage,\nobreak,\noexpand,\nonfrenchspacing}
+% \DoNotIndex{\obeylines,\or,\protect,\raggedleft,\rightskip,\rm,\sc}
+% \DoNotIndex{\setbox,\setcounter,\small,\space,\string,\strut}
+% \DoNotIndex{\strutbox}
+% \DoNotIndex{\thefootnote,\thispagestyle,\topmargin,\trivlist,\tt}
+% \DoNotIndex{\twocolumn,\typeout,\vss,\vtop,\xdef,\z@}
+% \DoNotIndex{\,,\@bsphack,\@esphack,\@noligs,\@vobeyspaces,\@xverbatim}
+% \DoNotIndex{\`,\catcode,\end,\escapechar,\frenchspacing,\glossary}
+% \DoNotIndex{\hangindent,\hfil,\hfill,\hskip,\hspace,\ht,\it,\langle}
+% \DoNotIndex{\leaders,\long,\makelabel,\marginpar,\markboth,\mathcode}
+% \DoNotIndex{\mathsurround,\mbox,\newcount,\newdimen,\newskip}
+% \DoNotIndex{\nopagebreak}
+% \DoNotIndex{\parfillskip,\parindent,\parskip,\penalty,\raise,\rangle}
+% \DoNotIndex{\section,\setlength,\TeX,\topsep,\underline,\unskip,\verb}
+% \DoNotIndex{\vskip,\vspace,\widetilde,\\,\%,\@date,\@defpar}
+% \DoNotIndex{\[,\{,\},\]}
+% \DoNotIndex{\count@,\ifnum,\loop,\today,\uppercase,\uccode}
+% \DoNotIndex{\baselineskip,\begin,\tw@}
+% \DoNotIndex{\a,\b,\c,\d,\e,\f,\g,\h,\i,\j,\k,\l,\m,\n,\o,\p,\q}
+% \DoNotIndex{\r,\s,\t,\u,\v,\w,\x,\y,\z,\A,\B,\C,\D,\E,\F,\G,\H}
+% \DoNotIndex{\I,\J,\K,\L,\M,\N,\O,\P,\Q,\R,\S,\T,\U,\V,\W,\X,\Y,\Z}
+% \DoNotIndex{\1,\2,\3,\4,\5,\6,\7,\8,\9,\0}
+% \DoNotIndex{\!,\#,\$,\&,\',\(,\),\+,\.,\:,\;,\<,\=,\>,\?,\_}
+% \DoNotIndex{\discretionary,\immediate,\makeatletter,\makeatother}
+% \DoNotIndex{\meaning,\newenvironment,\par,\relax,\renewenvironment}
+% \DoNotIndex{\repeat,\scriptsize,\selectfont,\the,\undefined}
+% \DoNotIndex{\arabic,\do,\makeindex,\null,\number,\show,\write,\@ehc}
+% \DoNotIndex{\@author,\@ehc,\@ifstar,\@sanitize,\@title,\everypar}
+% \DoNotIndex{\if@minipage,\if@restonecol,\ifeof,\ifmmode}
+% \DoNotIndex{\lccode,\newtoks,\onecolumn,\openin,\p@,\SelfDocumenting}
+% \DoNotIndex{\settowidth,\@resetonecoltrue,\@resetonecolfalse,\bf}
+% \DoNotIndex{\clearpage,\closein,\lowercase,\@inlabelfalse}
+% \DoNotIndex{\selectfont,\mathcode,\newmathalphabet,\rmdefault}
+% \DoNotIndex{\bfdefault}
+% \DoNotIndex{\^}
+%
+% \MakeShortVerb{\|}
+% \setcounter{StandardModuleDepth}{1}
+% \renewcommand{\partname}{Part}
+%
+% {\catcode`\p=12 \catcode`\t=12 ^^A hack used later on to print
+% \gdef\dimenvalue#1pt{$#1$pt}}  ^^A a register value with a - sign
+%
+% \newcommand{\Songbook}{\textrm{Song$\flat$ook}}
+% \GetFileInfo{songbook.dtx}
+%
+% \title{The \Songbook{} Package\\
+%        {\large Version 4.1a}}
+% \author{Christopher Rath\\
+%         {\small$<$\texttt{Christopher@Rath.ca}$>$}}
+% \date{2003/08/31}
+% \maketitle
+% 
+% \begin{abstract}
+%   This package provides an all purpose songbook style for \LaTeX2e.
+%   The package allows for three types of output from a single input
+%   file: words and chords books for the musicians to play from, words
+%   only songbooks for the congregation to sing from, and overhead
+%   transparency masters for congregational use.  The style will also
+%   print a table of contents, an index sorted by title and first line,
+%   and an index sorted by key.  It attempts to handle songs in multiple
+%   keys, as well as songs in multiple languages.
+% \end{abstract}
+% 
+% {\parskip 0pt                ^^A We have to reset \parskip
+%                              ^^A (bug in \LaTeX)
+% \tableofcontents
+% }
+% 
+% \section*{Preface to version 4.1a}
+% What's new in version~4.1a:
+% \begin{itemize}
+%  \item Corrected a bug whereby the new exclude song mode was throwing 
+%   an error when either the |\SBRef| or |\SBMargNote| commands were used
+% \end{itemize}
+% 
+% \section*{Preface to version 4.1}
+% 
+% What's new in version~4.1:
+% \begin{itemize}
+%  \item a new optional \meta{Include?} parameter has been added to 
+%   the |song| environment; that parameter allows you to have a song omitted 
+%   from the printed songbook yet still have the song counter incremented 
+%   and the song's table of contents entry written to a separate TOC file 
+%   (see the description of the |song| environment, below, for more details)
+%
+%  \item to go along with the new optional \meta{Include?} parameter 
+%   is a new |\usepackage{}| option, |printallsongs|, which overrides the
+%   individual song option declarations and prints all the songs in the
+%   songbook
+%  
+%  \item the song ``My Sun and My Shield'' was removed from the sample songbook;
+%   it turns out that this is a Ted Sandquist song and is not in the public
+%   domain
+%
+%  \item |chordbk|'s |compactsong| option is still experimental
+% \end{itemize}
+% 
+% \section*{Preface to version 4.0}
+% What's new in version~4.0:
+% \begin{itemize}
+%  \item the \Songbook{} style has now completed its
+%   transition to \LaTeX2e (I \emph{think}): there is now a single \texttt{.sty} file
+%   which accepts options in order to invoke the different songbook
+%   styles.  The \Songbook{} style now also accepts and produces
+%   reasonable output for all of \LaTeX2e's standard papersize options.
+% 
+%  \item the song title block (where the title, copyright info., etc.
+%   are listed) has been changed, use of the |\centerline| macro has
+%   been replaced with a |center| environment.  This change is \emph{not
+%     compatible} with previous versions of \texttt{songbook.sty} and
+%   requires you to re-verify all page breaks (mostly in words-only
+%   mode).  The reason for making the change is to allow long song
+%   titles to line-wrap (instead of hanging off the edge of the page),
+%   and this means that the definition of the following macros has been
+%   changed: |\STitle|, |\CpyRt|, |\WAndM|, and |\ScriptRef|.  The
+%   centering of these lines is now also done within a center
+%   environment; in each the centering may now be disabled by adding an
+%   optional first parameter (any value except `|Y|')
+% 
+%  \item since the change to the title block invalidated pagination of
+%   the previous version I have taken the opportunity to fine tune the
+%   value of |\SpaceAfterSong|, a value that is used primarily in
+%   words-only mode: the inter-song gap has been decreased to
+%   |\vspace{0ex| |plus10ex| |minus3ex}| (from |\vspace{0ex| |plus15ex|
+%     |minus0ex}|)
+% 
+%  \item a new space command, |\SpaceAfterTitleBlk|, has been created to
+%   allow the space between a song's title block and its versicles to be
+%   tuned by the user; this was a previously hardcoded value
+%
+%  \item a bug in the |SBBracket| environment has been corrected: long
+%   lines were not always exhibiting their hanging indentation
+%
+%  \item the style now supports all of \LaTeX2e's standard papersizes.
+%   While the output will not be ideal for all papersizes, it does
+%   produce sane and usable results for all papersizes.  I would be most
+%   appreciative if European users would send me page layout corrections
+%   for the A4, A5, and B5 sizes
+% 
+%  \item added a new environment, |SBOpGroup| (i.e., ``an open group''),
+%   serves to group the lines of a verse or chorus together, but not
+%   indent or label them.  Use of this environment allows for better
+%   control of font changes, proper indentation of wrapped lines, and
+%   automatic spacing of open groups which follow one another.  I
+%   strongly suggest that |SBOpGroup| be used to enclose any set of
+%   lines which don't otherwise end up in one of the songbook
+%   environments when typsetting with this package
+% 
+%  \item |chordbk| mode now supports one variation: |compactsong|.  In
+%   |compactsong| mode the songs are laid out in two columns; note that
+%   the song title block spans the two columns.  The songs are set in a
+%   smaller typeface to allow them to fit into the smaller space two
+%   column mode supplies.  This mode should be considered experimental
+%   for the present time; see its description, below, for more details
+% 
+%  \item |conditionals.sty| has been updated with more current
+%   information and macros, as supplied by Donald Arseneau
+% 
+%  \item all of the verse-like environments now have their |\baselineskip|
+%   amount expressly calculated just prior to laying out their lines.
+%   This has been done in order to overcome the problem all previous
+%   versions of the songbook style had which was that linespacing
+%   differed based upon whether a particular line contained chords.  Now
+%   all lines are spaced the same, regardless of whether they contain a
+%   chord.  I consider the previous behaviour---where linespacing
+%   varied---to be a bug.  If you really must retain the old behaviour
+%   this can be done by inserting the following code into the preamble
+%   of your document:
+%   \begin{verbatim}
+%     \renewcommand{\sbSetsbBaselineSkipAmt}
+%       {\setlength{\sbBaselineSkipAmt} {\baselineskip}}
+%   \end{verbatim}
+% 
+%  \item the |\SBDefaultFont| command no longer needs to be specified at
+%   the top of each songbook
+%
+%  \item fixed a bug that was inhibiting the \Songbook{} style from 
+%   detecting blank and empty |song| parameters
+% 
+%  \item the commands which had previously been listed as deprecated
+%   (i.e., to be removed in some future release) have all been removed
+% 
+%  \item the following commands have been moved from the ``Obsolete
+%   Macros'' section into ``Deprecated Macros'' section and will be
+%   removed in the next major release of the \Songbook{} style:
+%   |\False|, |\True|, |\ChordBk|, |\Overhead|, |\SongEject|, |\WordBk|,
+%   and |\WordsOnly|
+% \end{itemize}
+% 
+% A few minor changes were made during release testing of version~4.0.
+% The following changes occured between version~4.0pre2 and~4.0:
+% \begin{itemize}
+%  \item the spacing around the |SBBracket| environment has been
+%   \emph{tuned}:\\
+%   |\SpaceAfterSBBracket| has been increased, and a new\\
+%   |\SpaceBeforeSBBracket| amount has been added
+%
+%  \item added missing space around the |SBBracket*| environment; using\\
+%   |\SpaceBeforeSBBracket| and |\SpaceAfterSBBracket|
+%
+%  \item removed unused length, |\SBBracketHangAmt|
+%
+%  \item added a new |\LeftMarginSBBracket| length and rewrote the part
+%   of the |SBBracket| environment that creates the tag and left indents
+%   the versicle.  The |SBBracket| environment now left aligns its words
+%   with those of the |SBVerse| and |SBChorus| versicles.
+% \end{itemize}
+% 
+% \part{High Level Documentation}
+% \section{Description}
+% 
+% The \Songbook{} document style provides a core set of functions for
+% the production of songbooks.  Three pre-defined songbook formats and
+% one variation are provided (and they are invoked via options to the
+% |\usepackage{songbook}| command) and they are typically used along
+% with \LaTeX's |book| class.  One of the following options \emph{must}
+% be specified or the \Songbook{} style will throw an error: |chordbk|,
+% |wordbk|, or |overhead|.
+% 
+% An empty minimal songbook looks like the following:
+% \begin{verbatim}
+%   \documentclass{book}
+%   \usepackage[chordbk]{songbook}
+% 
+%   \begin{document}
+%     \begin{song}{}{}{}{}{}{}
+%     \end{song}
+%   \end{document}
+% \end{verbatim}
+% 
+% We'll start by explaining the |\usepackage[]{songbook}| options:
+% \begin{description}
+%  \item[|chordbk|\ ] \DescribeMacro{chordbk} a songbook suitable for
+%   musicians which gives both lyrics and words (this is the default
+%   mode of the \Songbook{} document style)---one variation to this
+%   style is offered, compact song mode (see below).  This option is
+%   specified as |\usepackage[chordbk]{songbook}|
+% 
+%  \item[|wordbk|\ ] \DescribeMacro{wordbk} a words-only songbook
+%   suitable for mass distribution to those singing but not playing
+%   an instrument.  This option is specified as\\ 
+%   |\usepackage[wordbk]{songbook}|
+% 
+%  \item[|overhead|\ ] \DescribeMacro{overhead} to produce overhead
+%   transparencies from songbook source files.  This option is specified
+%   as |\usepackage[overhead]{songbook}|
+% \end{description}
+% 
+% Other additional options supported by the \Songbook{} style include
+% all \LaTeX's standard papersize options, and:
+% \begin{description}
+%  \item[|compactsong|\ ] \DescribeMacro{compactsong} this option only
+%   takes effect along with |chordbk|.  It causes the songs to be set in
+%   two columns, where the song title information spans the both
+%   columns.  It is specified as\\
+%   |\usepackage[chordbk,compactsong]{songbook}|
+%
+%   The version of |compactsong| provided in this release should be 
+%   considered experimental!  The formatting produced in this mode 
+%   is not always desirable.  An outstanding question to be answered
+%   is whether or not new songs title blocks should span both columns,
+%   and whether each song should generate a page break; in other words,
+%   should this feature set be implemented as two pieces: compactsong
+%   and compactbook.  The idea would be to provide a compactsong
+%   environment, which could be judiciously used on a per song basis,
+%   and a compactbook mode which would result in a compressed songbook,
+%   where the words and chords book would look very much like a words
+%   only songbook (but with chords).
+%
+%  \changes{v4.1}{2003/08/31}{Added |printallsongs| documentation.}
+%  \item[|printallsongs|\ ] \DescribeMacro{printallsongs} this option
+%   causes all songs in a songbook to be printed, regardless of what
+%   \meta{Include?} option may have been specified on each
+%   individual |song| environment
+% \end{description}
+% 
+% \section{Commands}
+% This section is broken into several subsections.  Hopefully this makes
+% the individual commands easier to understand by placing them in a
+% meaningful context.  Since some forward references exist, it may be
+% necessary to read through the entire \textit{Commands\/} section a
+% couple of times before it makes complete sense.
+% 
+% This reference section will present terse command and environment
+% descriptions; more detailed descriptions, along with examples, may be
+% found in the implementation detail section at the bottom of this
+% document.
+% 
+% Note that each subsection's descriptions are presented in alphabetical
+% order; while this doesn't make the sections quite as easy to read, it
+% makes them much more useful for reference purposes.
+% 
+% \subsection{Environments}
+% The \Songbook{} style defines several new environments to make the
+% formatting of songbooks easier and more consistent (and most of them
+% have parameters).  Unless otherwise noted, all of the environments are
+% |verse|-like: wrapped lines are indented more than the first line is
+% indented.
+% 
+% \begin{description}
+%  \item |\begin{SBBracket}{|\meta{bracket tag}|}|\meta{\ldots stuff to
+%       enbracket\ldots}\\ |\end{SBBracket}|
+%   \DescribeEnv{SBBracket} is the environment used to mark certain
+%   lines of the song with a tag and bracket.  An example usage is
+%   to mark the line of the song played to end the piece, if it is
+%   somehow different than the chords played if one were to repeat the
+%   song.  For example:
+%   \begin{verbatim}
+%          Be\Ch{Am}{cause} of \Ch{Dm7}{what} the...
+%       \end{SBChorus}
+% 
+%       \begin{SBBracket}{Ending}
+%          Give \Ch{F}{thanks,}\Ch{C/F}{} \Ch{Bb/F}{}...
+%       \end{SBBracket}
+%   \end{verbatim}
+%   This is very similar to the |SBOccurs| environment, the difference
+%   being how the section of the song is marked.
+%   
+%   \DescribeEnv{SBBracket*} There are two versions of this
+%   environment: |SBBracket| and |SBBracket*|.  They operate
+%   identically, except that the |*|ed version doesn't print its tag and
+%   bracket in words-only modes.
+% 
+%   At present, |\SBBracket| and |\SBBracket*| are fragile and are not
+%   compatible with |SBVerse|, |SBChorus|, or any other environment; 
+%   with the exception of the |song| environment.
+%   
+%  \item |\begin{SBChorus}|\meta{\ldots the
+%       chorus\ldots}|\end{SBChorus}| \DescribeEnv{SBChorus} is
+%   the environment to wrap around a chorus that you wish to be indented
+%   and given a chorus tag (``Ch:'').  A song with one verse and one
+%   chorus, where the chorus is sung after the verse would probably use
+%   the |SBChorus| environment.  Whereas, if the chorus was sung first,
+%   an |SBVerse| environment would probably be used.  The indent amount
+%   for lines that are too long is set by redefining the |\HangAmt|
+%   command.
+%   
+%   \DescribeEnv{SBChorus*} The |SBChorus*| version of this
+%   command indents but does not place a |\SBChorusTag| before the
+%   chorus.
+%   
+%  \item |\begin{SBExtraKeys}{|\meta{song content}|}\end{SBExtraKeys}|
+%   \DescribeEnv{SBExtraKeys} is the environment used when you
+%   wish to list the song again in another key.  Typically, this
+%   environment is used along with an |\STitle| command.  For example:
+%   \begin{verbatim}
+%       \begin{SBExtraKeys}{
+%          \STitle{You Alone}{D}
+% 
+%          \begin{SBVerse}
+%             \Ch{D}{Ho}\Ch{F#m}{ly,} \Ch{G}{Ho}\Ch{D}{ly,}
+%             ...
+%          \end{SBVerse}
+%       }\end{SBExtraKeys}
+%   \end{verbatim}
+%   
+%  \item |\begin{SBOccurs}{|\meta{the occurrence}|}|\meta{\ldots stuff
+%       to group\ldots}|\end{SBOccurs}|
+%   \DescribeEnv{SBOccurs} is the environment used to mark a
+%   given line of the song with a tag and brackets.  For example ``1,3''
+%   would designate that this passage applies to the 1st and 3rd
+%   occurances.  For example:
+%   \begin{verbatim}
+%          Be\Ch{Am}{cause} of \Ch{Dm7}{what} the...
+%       \end{SBChorus}
+% 
+%       \begin{SBOccurs}{1,3}
+%          Give \Ch{F}{thanks,}\Ch{C/F}{} \Ch{Bb/F}{}...
+%       \end{SBOccurs}
+%   \end{verbatim}
+%   
+%  \item |\begin{SBOpGroup}|\meta{\ldots stuff to
+%       group\ldots}|\end{SBOpGroup}| \DescribeEnv{SBOpGroup} is
+%   the environment in which unmarked versicles are placed; so called
+%   ``open groups''.
+%   
+%  \item |\begin{SBSection}|\meta{\ldots the
+%       section\ldots}|\end{SBSection}| \DescribeEnv{SBSection}
+%   is very much like\\ \LaTeX's verse environment, except that here the
+%   sections are numbered.  The indent amount for lines that are too
+%   long is set using the |\HangAmt| command.  This environment would be
+%   used in place of the |\SBVerse| environment for songs which are
+%   broken into pieces/sections, in place of, or in addition to, verses.
+%   
+%   \DescribeEnv{SBSection*} The |SBSection*| version of this
+%   command indents but doesn't place an |\SBSectionCnt| before the
+%   chorus.  Similar to \LaTeX's |\section*| command, the section
+%   counter is not incremented either.
+%   
+%  \item |\begin{SBVerse}|\meta{\ldots the chorus\ldots}|\end{SBVerse}|
+%   \DescribeEnv{SBVerse} is the environment to wrap around a
+%   verse that you wish to be indented and given a verse number
+%   (|\SBVerseCnt|).  A song with one chorus and one verse, where the
+%   verse is sung after the verse would probably use the |SBChorus|
+%   environment.  Whereas, if the chorus was sung first, an |SBVerse|
+%   environment would probably be used.  The indent amount for lines
+%   that are too long is set with the |\HangAmt| command.
+%   
+%   \DescribeEnv{SBVerse*} The |SBVerse*| version of this
+%   environment indents but down not place an |\SBVerseCnt| before the
+%   chorus; similar to \LaTeX's |\section*| command, the verse counter
+%   is not incremented either.
+%   
+%  \item |\begin{song}[|\meta{1}|]{|\meta{2}|}|\ \ldots|{|\meta{7}|}|\ \meta{\ldots
+%       the song\ldots}|\end{song}| \DescribeEnv{song} is the
+%   environment which each song resides within.  The parameter list is
+%   quite long, and is defined as:
+%   \begin{enumerate}
+%    \item Include this song? (optional);
+%    \item Song title;
+%    \item Key song is written in;
+%    \item Copyright information;
+%    \item Name(s) of composer and lyricist;
+%    \item Scripture reference for the song;
+%    \item Copyright licensing information.
+%   \end{enumerate}
+%   The |song| environment takes care of making index entries,
+%   incrementing |\SBSongCnt| and page generation (if necessary).
+%   Note, this environment makes use of |\everypar|.  See the
+%   \textit{Example\/} section, below, for a sample one-song songbook
+%   document.
+%    
+%   The ``Include this song?'' parameter is optional; the parameter is referred
+%   to within this documentation as ``\meta{Include?}''.  If you don't specify
+%   it (and you typically do not), then it behaves as though you provided
+%   a value of ``\texttt{Y}''.  If you specify any other value then the
+%   song is excluded from the current songbook; however, a table of
+%   contents record is written to a separate file
+%   (\textit{jobname}|.tocS|).
+%
+%   \DescribeMacro{\CBExcl}\DescribeMacro{\OHExcl}\DescribeMacro{\WBExcl}
+%   \DescribeMacro{\WOExcl}Some predefined macros have been provided
+%   which allow conditional exclusion of a song (they are used in the 
+%   optional parameter): |\CBExcl|, |\OHExcl|, |\WBExcl|, and |\WOExcl|;
+%   respectively, these correspond to exclude in |chordbk| mode,
+%   |overhead| mode, |wordbk| mode, and when in words-only (i.e., not in
+%   |chordbk|) mode.
+%
+%   As an organisation's songbook grows, and time passes, it is not 
+%   uncommon for the songbook to become overly large.  The \meta{Include?}
+%   parameter allows for a songbook's songs to be easily removed
+%   and re-added, without requiring old songbooks to be destroyed or
+%   overhead transparencies renumbered.
+%   
+%   When the ``copyright information'' or ``composer \& lyricist''
+%   parameters are left empty then the string defined by the
+%   |\SBUnknownTag| macro used (instead of leaving whitespace
+%   in the song header.
+%   
+%  \item |\begin{xlatn}{|\meta{1}|}|\ \ldots|{|\meta{3}|}|\ \meta{\ldots
+%       the translation\ldots}|\end{xlatn}|\DescribeEnv{xlatn}
+%   is the song translation environment.  The parameter list is defined
+%   as:
+%   \begin{enumerate}
+%    \item \ Translated song title (in the foreign language);
+%    \item \ Translation permission;
+%    \item \ Who performed the translation.
+%   \end{enumerate}
+%   The |xlatn| environment always occurs within a |song| environment;
+%   it resets the verse counter, causes the title and other parameter
+%   information to be displayed, and makes the appropriate index and
+%   table of contents entries.  It is important for the |xlatn|
+%   environment to occur within a song environment, because the |xlatn|
+%   environment inherits the song environment's |\everypar| definition.
+% \end{description}
+% 
+% \subsection{Primary \Songbook{} Macros}
+% Along with the \Songbook{} environments, these are the macros you will
+% most often use when constructing a songbook (of any style).
+% 
+% \begin{description}
+%  \item |\CBPageBrk| \DescribeMacro{\CBPageBrk} forces a new page if
+%   |\ifChordBk| is true.
+%   
+%  \item |\Ch{|\meta{chord}|}{|\meta{syllable}|}| \DescribeMacro{\Ch}
+%   the chord over lyrics command definition.  This is the most commonly
+%   used command in the \Songbook{} style.  The words-only sub-style
+%   turns off the chord generation and just prints the second parameter.
+%   The \meta{chord} parameter is left-justified over the
+%   \meta{syllable} parameter.  Any `\#' or `b' characters in the
+%   \meta{chord} parameter are replaced with `$\sharp$' and `$\flat$'
+%   characters, respectively.  Also, if a bass note is specified in a
+%   chord (by way of a `/' character followed by the note) then it will
+%   appear in a smaller font than the rest of the \meta{chord}.
+% 
+%   It is often desireable to typeset a chord---or set of
+%   chords---inside square brackets, to indicate that they are optional.
+%   A lighter weight font is probably desired, so that the brackets do
+%   not detract from the chord name, so any `[' and `]' characters are
+%   typeset with the font specified by the |\ChBkFont| macro.
+% 
+%   To set the chord raise amount to a value that matches version~1.x
+%   and~2.x releases of the \Songbook{} style, insert the following
+%   command into the preamble of your document:
+%   \begin{verbatim}
+%       \renewcommand{\SBChordRaise}{\SBOldChordRaise}
+%   \end{verbatim}
+%   
+%  \item |\Chr{|\meta{chord}|}{|\meta{syllable}|}| \DescribeMacro{\Chr}
+%   this command performs the same function as the |\Ch| command with
+%   one exception: the |\Chr| command inserts a rule, at the height
+%   specified by the |\SBRuleRaiseAmount| macro, when the chord is wider
+%   than the syllable.  The default value creates an extended
+%   em-dash-like rule; a value of 0pt creates an underbar-like rule.
+%   See the \textit{Usage Guidelines} section of this document, below,
+%   for a more detailed explanation.
+%   
+%  \item |\ChX{|\meta{chord}|}{|\meta{syllable}|}| \DescribeMacro{\ChX}
+%   this command performs the same function as the |\Ch| command with
+%   one exception: the |\ChX| command causes spaces trailing the command
+%   to be ignored.  See the \textit{Usage Guidelines} section of this
+%   document, below, for a more detailed explanation.
+%   
+%  \item |\CSColBrk| \DescribeMacro{\CSColBrk} generates a column break
+%   here if we're in |compactsong| mode.
+%   
+%  \item |\makeKeyIndex| \DescribeMacro{\makeKeyIndex} start creation of
+%   an index of songs by key.  If you need to add your own information
+%   to this index use the |\keyIndex[][]| command, documented in the
+%   \textit{Detailed Documentation} section, below.
+%   
+%  \item |\makeTitleContents| \DescribeMacro{\makeTitleContents} start
+%   creation of a table of contents.  If you need to add your own
+%   information to this index use the |\titleContents[][]| command,
+%   documented in the \textit{Detailed Documentation} section, below.
+%   
+%  \item |\makeTitleContentsSkip| \DescribeMacro{\makeTitleContentsSkip} start
+%   creation of a table of contents of songs exluded from the current 
+%   songbook.  This macro operates in the same manner as |\makeTitleContents|.
+%   
+%  \item |\makeTitleIndex| \DescribeMacro{\makeTitleIndex} start
+%   creation of a title and first line index.  If you need to add your
+%   own information to this index use the |\titleIndex[][]| command,
+%   documented in the \textit{Detailed Documentation} section, below.
+%   
+%  \item |\NotWOPageBrk| \DescribeMacro{\NotWOPageBrk} forces a new page
+%   if |\ifWordsOnly| is false.
+%   
+%  \item |\OHContPgFtr| \DescribeMacro{\OHContPgFtr} prints a page
+%   heading continuation footer on overheads; this macro must be
+%   manually inserted where needed.  |\OHContPgHdr| is a no-op, except when
+%   |\ifOverhead| is true.
+%   
+%  \item |\OHContPgHdr| \DescribeMacro{\OHContPgHdr} prints a page
+%   heading continuation header on overheads; this macro must be
+%   manually inserted where needed.  |\OHContPgHdr| is a no-op, except when
+%   |\ifOverhead| is true.
+%   
+%  \item |\OHPageBrk| \DescribeMacro{\OHPageBrk} forces a new page if
+%   |\ifOverhead| is true.
+%   
+%  \item |\SBBridge{|\meta{the bridge}|}| \DescribeMacro{\SBBridge}
+%   is used to encapsulate a bridge: it causes \meta{the bridge} to be
+%   set with |\SBBridgeTag|, using in the |\SBBridgeTagFont| font.  In
+%   words-only mode this command is a no-op.
+%   
+%  \item |\SBEnd[|\meta{use in words-only}|]{|\meta{the ending}|}|
+%   \DescribeMacro{\SBEnd} is used to encapsulate a song ending: it
+%   causes \meta{the ending} to be set with the |\SBEndTag|, using in
+%   the |\SBEndTagFont| font.  The first parameter is optional and if
+%   used is put in square brackets; specifying any value except `N' will
+%   cause the ending to be used in words-only mode.  Some examples of
+%   its intended use are:
+%   \begin{description}\item
+%     \emph{This will cause the ending to be printed in words-only mode.  Note
+%     how the parameter is specified in square brackets!}
+%    \begin{verbatim}
+%       \SBEnd[Y]{Give \Ch{F}{thanks,} \ldots}
+%    \end{verbatim}
+% 
+%    \emph{In this case the ending is a no-op in words-only mode.}
+%    \begin{verbatim}
+%       \SBEnd{\Ch{A}{} \Ch{B/A}{} \Ch{D}{}}
+%    \end{verbatim}
+%   \end{description}
+%   
+%  \item |\SBIntro[|\meta{use in words-only}|]{|\meta{the
+%       introduction}|}| \DescribeMacro{SBIntro} is used to encapsulate
+%   any introduction to a song: it causes \meta{the introduction} to be
+%   set with an intro tag of ``Intro:'', using in the |\SBIntroTagFont|
+%   font.  The first parameter is optional and if used is put in square
+%   brackets; specifying any value except `N' will cause the ending to
+%   be used in words-only mode.  Some examples of its intended use are:
+%   \begin{description}\item
+%     \emph{This will cause the ending to be printed in words-only mode.
+%       Note how the parameter is specified in square brackets!}
+%    \begin{verbatim}
+%      \SBIntro[Y]{\Ch{D}{} \Ch{C}{} Ooooh}
+%    \end{verbatim}
+% 
+%    \emph{In this case the ending is a no-op in words-only mode.}
+%    \begin{verbatim}
+%      \SBIntro{{\SBLyricNoteFont Guitar and drums}}
+%    \end{verbatim}
+%   \end{description}
+%   
+%  \item |\SBMargNote{|\meta{marginal note}|}|
+%   \DescribeMacro{\SBMargNote} is used to place a note of some kind in
+%   the margin of a songbook.  In words-only mode this macro is a no-op.
+%   
+%  \item |\SBRef{|\meta{book title}|}{|\meta{page or song number}|}|
+%   \DescribeMacro{\SBRef} creates a reference in the margin to another
+%   music book, or tape.  This provides a method for directing people to
+%   resources they may use to learn the song.  The marginal reference
+%   only prints when |\WordsOnly| is |\False|.
+%   
+%  \item |\SBem| \DescribeMacro{\SBem} prints an \textit{em-dash} (i.e.,
+%   ``---'') when |\WordsOnly| is |\False.| See |\SBen|.
+%   
+%  \item |\SBen| \DescribeMacro{\SBen} prints an \textit{en-dash} (i.e.,
+%   ``--'') when |\WordsOnly| is |\False.| This allows us to place a
+%   short rule within text in order place a chord earlier than a
+%   syllable; yet, that rule will not appear in the words-only book.
+%   The words-only version of this macro is a no-op.  An example of its
+%   intended use is:
+%   \begin{verbatim}
+%       ...flows like a ri\Ch{B/A}{\SBen ver,} flows...
+%   \end{verbatim}
+%   
+%  \item |\STitle{|\meta{song title}|}{|\meta{key}|}|
+%   \DescribeMacro{\STitle} prints the \meta{song title}, preceded by
+%   the current |\SBSongCnt| value and followed by the \meta{key} the
+%   song is given in.  |\STitle| is most often used along with the
+%   |SBExtraKeys| environment.  This command resets the |\SBVerseCnt|
+%   and |\SBSectionCnt| counters.
+%   
+%  \item |\WBPageBrk| \DescribeMacro{\WBPageBrk} forces a new page if
+%   |\ifWordBk| is true.
+%   
+%  \item |\WOPageBrk| \DescribeMacro{\WOPageBrk} forces a new page if
+%   |\ifWordsOnly| is true.
+% \end{description}
+% 
+% \subsection{Miscellaneous Commands}
+% Not all of the commands listed here are commonly used in songbooks
+% written using one of the \Songbook{} styles.  The commands are listed
+% alphabetically.
+% 
+% \begin{description}
+%  \item |\CpyRt{|\meta{copyright info.}|}| \DescribeMacro{\CpyRt}
+%   prints the copyright information line.  This command is not usually
+%   explicitly used in a songbook.  It is called by the |song|
+%   environment and will normally only be used there.
+%   
+%  \item |\FLineIdx{|\meta{first line}|}| \DescribeMacro{\FLineIdx} make
+%   an entry in the \textit{Title \& First Line Index\/} file,
+%   ``\texttt{\textit{jobname}}|.tIdx|.''
+% 
+%  \item |\SBChorusMarkright| \DescribeMacro{\SBChorusMarkright} hook to
+%   allow |\SBSection|'s |\markright| to be overridden.
+%   
+%  \item |\SBContinueMark| \DescribeMacro{\SBContinueMark} conditionally
+%   produce a continuation symbol.  If the contents of |\rightmark| will
+%   result in nothing being typeset, then don't output the continuation
+%   mark; otherwise, output a continuation mark using the
+%   |\SBContinueTag| command.
+%   
+%  \item |\SBSectionMarkright| \DescribeMacro{\SBSectionMarkright} hook
+%   to allow |\SBSection|'s |\markright| to be overridden.
+%   
+%  \item |\SBVerseMarkright| \DescribeMacro{\SBVerseMarkright} hook to
+%   allow |\SBVerse|'s |\markright| to be overridden.
+%   
+%  \item |\SongMarkboth| \DescribeMacro{\SongMarkboth} hook to allow the
+%   song environment's |\markboth| to be overridden.
+%   
+%  \item |\STitleMarkboth| \DescribeMacro{\STitleMarkboth} hook to allow
+%   |\STitle|'s |\markboth| to be overridden.
+%   
+%  \item |\ScriptRef{|\meta{scripture address}|}|
+%   \DescribeMacro{\ScriptRef} is a scripture reference for the song.
+%   This command has its name because the \Songbook{} style was written
+%   to produce songbooks for the church I am part of.  This command is
+%   not usually explicitly used in a songbook.  It is called by the
+%   |song| environment and will normally only be used there.
+%   
+%  \item |\WAndM{|\meta{lyricist \& composer}|}| \DescribeMacro{\WAndM}
+%   prints a line telling who wrote the words and music for this song.
+%   The string ``W\&M:'' precedes the listing of the \meta{lyricist \&
+%     composer} when it is printed.  This command is not usually
+%   explicitly used in a songbook.  It is called by the |song|
+%   environment and will normally only be used there.
+% \end{description}
+% 
+% \subsection{Ifthen Commands}
+% These |\if| tests are used to perform formatting that is dependent
+% upon the type of songbook you are creating.  It is these |\if| tests
+% which allow a single source file to output the three songbook styles.
+% \begin{description}
+%  \item |\ifSBinSongEnv| \DescribeMacro{\ifSBinSongEnv} is true if we
+%   are inside of a song environment.
+% 
+%  \item |\ifChordBk| \DescribeMacro{\ifChordBk} is true if we are
+%   processing a |chordbk| document.
+% 
+%  \item |\ifOverhead| \DescribeMacro{\ifOverhead} is true if we are
+%   processing an |overhead| document.
+% 
+%  \item |\ifWordBk| \DescribeMacro{\ifWordBk} are we processing a
+%   |wordbk| document?
+% 
+%  \item |\ifWordsOnly| \DescribeMacro{\ifWordsOnly} is true when we are
+%   typesetting a words-only document (i.e., no chords).
+% 
+%  \item |\ifNotWordsOnly| \DescribeMacro{\ifNotWordsOnly} is true if we
+%   are processing a document that displays chords.
+% 
+%  \item |\ifCompactSongMode| \DescribeMacro{\ifCompactSongMode} is set
+%   to true if you want songs presented in a compact mode?  It is
+%   initially set to false. Set this to true or false using the
+%   |\CompactSongModetrue| and |\CompactSongModefalse| commands,
+%   respectively.
+% 
+%  \item |\ifSongEject| \DescribeMacro{\ifSongEject} is set to true if we
+%   want a new page generated at the end of every |song| environment?  A
+%   value of true means eject after every |song| environment (default
+%   value is true).
+% \end{description}
+%
+% Papersize tests have been provided in order to detect if a
+% particular papersize has been specified.  These are only documented
+% in the \textit{Detailed Documentation} section, below, since they
+% are not generally needed.
+% 
+% 
+% \subsection{Counters}
+% These are the counters used in the various environments.  Although you
+% will generally not need to use them, they do sometimes come in handy;
+% hence, they have been documented here.
+% \begin{description}
+%  \item |\theSBSongCnt| \DescribeMacro{\theSBSongCnt} counter is used
+%   for numbering the songs.  When a song is listed multiple times (for
+%   multiple keys) the songs number must remain the same each time.
+% 
+%  \item |\theSBSectionCnt| \DescribeMacro{\theSBSectionCnt} the section
+%   counter is used for numbering sections as they occur within a song.
+% 
+%  \item |\theSBVerseCnt| \DescribeMacro{\theSBVerseCnt} the verse
+%   counter is used for numbering verses as they occur within a song.
+% \end{description}
+% 
+% 
+% \subsection{Spacing Commands}
+% These commands define the amount of space to leave in various
+% situations.  Change their values via \LaTeX's |\renewcommand| command.
+% 
+% All of these spaces are defined as \LaTeX{} commands to overcome
+% limitations in \LaTeX{} length evaluation.  For example, if
+% |\LeftMarginSBVerse| were to be defined as a length (i.e., using
+% |\newlength|) and then immediately set to |4em|'s, the specific length
+% would be evaluated with respect to the current font.  This may not be
+% what is desired; instead a length evaluated with respect to the font
+% in place at the start of an |SBVerse| is probably what is desired.
+% This can only be done by making these lengths \LaTeX{} commands
+% instead of lengths.
+% 
+% \begin{description}
+%  \item |\HangAmt| \DescribeMacro{\HangAmt} amount to indent when a
+%   line wraps.
+% 
+%  \item |\LeftMarginSBBracket| \DescribeMacro{LeftMarginSBBracket} is
+%   the amount of left margin to leave when the |\SBBracket| environment
+%   is in effect.
+% 
+%  \item |\LeftMarginSBChorus| \DescribeMacro{\LeftMarginSBChorus} is
+%   the amount of left margin to leave when the |\SBChorus| environment
+%   is in effect.
+% 
+%  \item |\LeftMarginSBSection| \DescribeMacro{LeftMarginSBSection} is
+%   the amount of left margin to leave when the |\SBSection| environment
+%   is in effect.
+% 
+%  \item |\LeftMarginSBVerse| \DescribeMacro{\LeftMarginSBVerse} is the
+%   amount of left margin to leave when the |\SBVerse| environment is in
+%   effect.
+% 
+%  \item |\SBChordRaise| \DescribeMacro{\SBChordRaise} the distance to
+%   raise the chords above the baseline of the text they sit over.
+% 
+%  \item |\SBRuleRaiseAmount| \DescribeMacro{\SBRuleRaiseAmount} the
+%   distance to raise the rule (as specified by\\
+%   |\SBIntersyllableRule|) which fills the space between adjoining
+%   syllables.
+% 
+%  \item |\SpaceAboveSTitle| \DescribeMacro{\SpaceAboveSTitle} is the
+%   amount of vertical space left by the |STitle| command before it
+%   prints the song title line.
+% 
+%  \item |\SpaceAfterTitleBlk| \DescribeMacro{\SpaceAfterTitleBlk} is
+%   the space inserted by the song environment between the
+%   \emph{title block} and the versicles.
+%
+%  \item |\SpaceAfterChorus| \DescribeMacro{\SpaceAfterChorus} is the
+%   vertical space to leave after an |SBChorus|.
+% 
+%  \item |\SpaceAfterOpGroup| \DescribeMacro{\SpaceAfterOpGroup} is the
+%   vertical space to leave after an |SBOpGroup|.
+% 
+%  \item |\SpaceAfterSection| \DescribeMacro{\SpaceAfterSection} is the
+%   vertical space to leave after an |SBSection|.
+% 
+%  \item |\SpaceAfterSBBracket| \DescribeMacro{\SpaceAfterSBBracket} is the
+%   vertical space to leave after an |SBBracket|.
+% 
+%  \item |\SpaceAfterSong| \DescribeMacro{\SpaceAfterSong} is the
+%   vertical space to leave after a |song|.
+% 
+%  \item |\SpaceAfterVerse| \DescribeMacro{\SpaceAfterVerse} is the
+%   vertical space to leave after an |SBVerse|.
+%
+%  \item |\SpaceBeforeSBBracket| \DescribeMacro{\SpaceBeforeSBBracket} is the
+%   vertical space to leave before an |SBBracket|.
+% 
+% \end{description}
+% 
+% It is worth noting that the |\SpaceAfterChorus|, |\SpaceAfterOpGroup|,\\
+% |\SpaceAfterSection|, and |\SpaceAfterSong|, |\SpaceAfterVerse|
+% macros all allow negative glue to be inserted; that is, the space may
+% be shrunk as well as expanded.  If this proves problematic (due to
+% sections being visibly pushed into each other, the old spacing (as in
+% versions~1.x and~2.x) can be restored by resetting these macros to~0ex.
+% For example:
+% \begin{verbatim}
+%     \renewcommand{\SpaceAfterChorus} {\vspace{0ex}}
+%     \renewcommand{\SpaceAfterOpGroup}{\vspace{0ex}}
+%     \renewcommand{\SpaceAfterSection}{\vspace{0ex}}
+%     \renewcommand{\SpaceAfterSong}   {\vspace{0ex}}
+%     \renewcommand{\SpaceAfterVerse}  {\vspace{0ex}}
+% \end{verbatim}
+% 
+% 
+% \subsection{String Constants}
+% These constants are provided so that users may easily customize the
+% appearance of formatted songs and songbooks.  Use the |\renewcommand|
+% command to change the value of these constants.
+% \begin{description}
+%  \item |\OHContPgFtrTag| \DescribeMacro{\OHContPgFtrTag} tag is inserted
+%   by the |\OHContPgFtr| command.  The default value for this is 
+%   ``|continued on next page\ldots|''.
+%
+%  \item |\OHContPgHdrTag| \DescribeMacro{\OHContPgHdrTag} tag is inserted
+%   by the |\OHContPgHdr| command.  The default value for this is 
+%   ``|\theSBSongCnt\ --- \theSongTitle, continued\ldots|''.
+%
+%  \item |\SBBridgeTag| \DescribeMacro{\SBBridgeTag} the Bridge Tag to
+%   insert before the start of a bridge.  The default value for this is
+%   ``|Bridge:|''.
+% 
+%  \item |\SBChorusTag| \DescribeMacro{\SBChorusTag} the Chorus Tag to
+%   insert before the first line of a chorus.  The default value for
+%   this is ``|Ch:|''.
+% 
+%  \item |\SBContinueTag| \DescribeMacro{\SBContinueTag} the Continue Tag
+%   to insert in an\\ |\SBContinueMark|.  The default value for this is
+%   ``|cont\ldots|''.
+% 
+%  \item |\SBEndTag| \DescribeMacro{\SBEndTag} the End Tag to insert
+%   before the start of an ending (in an |\SBEnd| command).  The default
+%   value for this is ``|End:|''.
+% 
+%  \item |\SBIntersyllableRule| \DescribeMacro{\SBIntersyllableRule} the
+%   command(s) to draw the rule between adjoining syllables.
+% 
+%  \item |\SBIntroTag| \DescribeMacro{\SBIntroTag} the Intro Tag to
+%   insert before the start of an introduction (in an |\SBIntro|
+%   command).  The default value for this is ``|Intro:|''.
+% 
+%  \item |\SBPubDom| \DescribeMacro{\SBPubDom} the string to insert
+%   which indicates song is in the public domain.  The default value for
+%   this is ``|Public Domain|''.  If you 
+%   want to localize this string in the song title block, be sure to use
+%   this public interface: the |\CpyRt| macro uses |\SBPubDom| to
+%   determine whether or not to print the copyright symbol (\copyright).
+% 
+%  \item |\SBUnknownTag| \DescribeMacro{\SBUnknownTag} the WAndM string
+%   to insert when either the author/artist or the copyright holder is
+%   unknown.  The default value for this is ``|Unknown|''.
+% 
+%  \item |\SBWAndMTag| \DescribeMacro{\SBWAndMTag} the tag to insert
+%   before the words and music entry printed in the song header.  The
+%   default value for this is ``|W\&M:|''.
+% \end{description}
+% 
+% 
+% \subsection{Font Handling}
+% Of all the font selection \Songbook{} macros, only one is commonly
+% used by someone writing a songbook: |\SBLyricNoteFont|.  All the other
+% font macros are only used by an author to over-ride default behaviour,
+% via the |\renewcommand| command.
+% 
+% \begin{description}
+%  \item |\ChBassFont| \DescribeMacro{\ChBassFont} sets the font for the
+%   bass note in chords as printed by the |\Ch|, |\Chr| and |\ChX|
+%   commands.
+% 
+%  \item |\ChBkFont| \DescribeMacro{\ChBkFont} sets the font for square
+%   brackets typeset inside |\Ch| commands (and its variants).
+% 
+%  \item |\ChFont| \DescribeMacro{\ChFont} sets the font for chords as
+%   printed by the |\Ch|, |\Chr|, and |\ChX| commands.
+% 
+%  \item |\CpyRtFont| \DescribeMacro{\CpyRtFont} sets the font used to
+%   print the copyright line produced by the |\CpyRt| command.
+% 
+%  \item |\CpyRtInfoFont| \DescribeMacro{\CpyRtInfoFont} sets the font
+%   used to print the \meta{copyright licensing information} parameter
+%   of the |song| environment; which appears after the \meta{copyright
+%     information} parameter under the \meta{song title.}
+% 
+%  \item |\SBBracketTagFont| \DescribeMacro{\SBBracketTagFont} sets the
+%   font used to create the tag for an |SBBracket| environment.
+% 
+%  \item |\SBBridgeTagFont| \DescribeMacro{\SBBridgeTagFont} sets the
+%   font used to create the tag for an |SBBridge| environment.
+% 
+%  \item |\SBChorusTagFont| \DescribeMacro{\SBChorusTagFont} sets the
+%   font used to print the chorus tag, |\SBChorusTag|.
+% 
+%  \item |\SBDefaultFont| \DescribeMacro{\SBDefaultFont} sets the
+%   default font for the songbook.  As of version~4.0 there is no need
+%   for you to specify this command yourself.
+% 
+%  \item |\SBEndTagFont| \DescribeMacro{\SBEndTagFont} sets the font
+%   used to print the tag, |\SBEndTag|, for the |\SBEnd| command.
+% 
+%  \item |\SBIntroTagFont| \DescribeMacro{\SBIntroTagFont} sets the
+%   font used to print the introduction tag, |\SBIntroTag|.
+% 
+%  \item |\SBLyricNoteFont| \DescribeMacro{\SBLyricNoteFont} sets the
+%   font used in comments placed within the lyrics giving musical
+%   direction.  This is the only font command commonly used by the
+%   writer of a songbook.
+% 
+%  \item |\SBMargNoteFont| \DescribeMacro{\SBMargNoteFont} sets the font
+%   used in the marginal reference printed by the |\SBMargNote| command.
+% 
+%  \item |\SBOccursBrktFont| \DescribeMacro{\SBOccursBrktFont} sets the
+%   font used to create the large left and right square brackets which
+%   delimit an |SBOccurs| environment.
+% 
+%  \item |\SBOccursTagFont| \DescribeMacro{\SBOccursTagFont} sets the
+%   font used to create the |\SBOccurs| tag.
+% 
+%  \item |\SBRefFont| \DescribeMacro{\SBRefFont} sets the font used in
+%   the marginal reference printed by the |\SBRef| command.
+% 
+%  \item |\SBVerseNumberFont| \DescribeMacro{\SBVerseNumberFont} sets the
+%   font used to print the |\SBVerseCnt| in front of verses in an
+%   |SBVerse| environment.
+% 
+%  \item |\SBSectionNumberFont| \DescribeMacro{\SBSectionNumberFont} sets
+%   the font used to print the |\SBSectionCnt| in front of sections in
+%   an |SBSection| environment.
+% 
+%  \item |\STitleFont| \DescribeMacro{\STitleFont} sets the font used to
+%   print the song title, as generated by the |\STitle| command.
+% 
+%  \item |\STitleKeyFont| \DescribeMacro{\STitleKeyFont} sets the font
+%   used to print the key a song is written in, as generated by the
+%   |\STitle| command.
+% 
+%  \item |\STitleNumberFont| \DescribeMacro{\STitleNumberFont} sets the
+%   font used to print the |\SBSongCnt| in front of the song title, as
+%   generated by the |\STitle| command.
+% 
+%  \item |\ScriptRefFont| \DescribeMacro{\ScriptRefFont} sets the font
+%   used to print the scripture reference generated by the |\ScriptRef|
+%   command.
+% 
+%  \item |\WandMFont| \DescribeMacro{\WandMFont} sets the font used to
+%   print the lyricist and composer line generated by the |\WandM|
+%   command.
+% \end{description}
+% 
+% 
+% \subsection{Deprecated Commands}
+% The following commands will be discontinued in some future release of
+% the \Songbook{} style:
+% \begin{description}
+%  \item |\ChordBk| is set to |\True| if we're producing words
+%   and chord books.  Set to |\False|, otherwise.  Superceded by the
+%   |\ifChordBk| if.
+% 
+%  \item |\False| is a constant used in \TeX\ |\if| expressions.
+%   This command is now unnecessary.
+% 
+%  \item |\Overhead| is set to |\True| if we're producing
+%   overhead transparencies.  Set to |\False|, otherwise.  Superceded by
+%   the |\ifOverhead| if.
+% 
+%  \item |\SongEject| is a flag indicating whether or not
+%   the |\song| environment should end the current page when the
+%   environment ends: |\True| means end the page when the |\song|
+%   environment ends; |\False| means don't end the page.  Superceded by
+%   the |\ifSongEject| if.
+% 
+%  \item |\True| is a constant used in \TeX\ |\if| expressions.
+%   This command is now unnecessary.
+% 
+%  \item |\WordBk| is the flag which tells us whether we're
+%   producing a songbook with just words that is not a set of overhead
+%   masters.  Superceded by the |\ifWordBk| if.
+% 
+%  \item |\WordsOnly| is the flag which tells us whether
+%   we're producing a songbook with just words, or set of overhead
+%   masters.  Superceded by the |\ifWordsOnly| if.
+% \end{description}
+% 
+% 
+% \section{Usage Guidelines}
+% This section gives some guidelines for use of the commands and
+% environments offered by the \Songbook{} style.  These are not absolute
+% standards, merely the suggestions that I have come up with after
+% entering some 450 songs into a \Songbook{} style based songbook.
+% These guidelines rarely justify themselves, try things out and decide
+% for yourself whether they're right or wrong.
+% \begin{enumerate}
+% 
+%  \item Make each line of a song its own paragraph.  This means that
+%   the songbook file is mostly double spaced.  This allows the file to
+%   more easily survive encounters with users who edit the songbook
+%   source using a non-text-editor, such as WordPerfect.
+% 
+%  \item Use of the |\Ch| command:
+%   \begin{itemize}
+%    \item Always try to attach a chord to a single syllable.  If you
+%     need to include more than one syllable with the chord then include
+%     extra text in units of syllables (whenever possible).  For
+%     example:
+%     \begin{description}
+%      \item[Do:] |\Ch{G}{Halle}luia|
+%      \item[Don't:] |\Ch{G}{Hall}eluia|
+%     \end{description}
+%    \item Always include punctuation along with a syllable that has
+%     been included in a |\Ch| command.  For example:
+%     \begin{description}
+%      \item[Do:] |\Ch{G}{Lord!}|
+%      \item[Don't:] |\Ch{G}{Lord}!|
+%     \end{description}
+%    \item Only place a single chord within a |\Ch| command.  For
+%     example:
+%     \begin{description}
+%     \item[Do:] |\Ch{[}{}\Ch{G}{} \Ch{D}{}\Ch{]}{}|
+%      \item[Don't:] |\Ch{[G D]}{}|
+%     \end{description}
+%   \end{itemize}
+% 
+%  \item Extension of syllables.  Syllables may be extended at either/or
+%   both ends.  Each end should be done in a different way:
+%   \begin{enumerate}
+%    \item One usually needs to make a syllable longer because the chord
+%     it is tied to is too long.  This type of extension should be done
+%     using the |\Chr| command.
+%     \begin{description}
+%      \item[Do:] |\Chr{G\#m7/C}{Ho}\Ch{C}{ly}|
+%      \item[Don't:] |\Ch{G\#m7/C}{Ho\SBem}\Ch{C}{ly}|
+%     \end{description}
+%    \item Extending the beginning (i.e., delaying the start) of a
+%     syllable is generally required because the chord change needs to
+%     occur \emph{between syllables.} For example, when the chord change
+%     is on the beat and the syllable is sung off-beat.  Use |\SBen| and
+%     |\SBem| for this purpose.
+%     \begin{description}
+%      \item[Do:] |none Ho\Ch{D}{\SBen ly}|
+%     \end{description}
+%   \end{enumerate}
+% 
+%  \item Typographic conventions.  \LaTeX{} knows about certain
+%   ligatures; that is, it groups certain sequences of letters into a
+%   single character unit.  |ff| is one of these ligatures and is
+%   typeset in a special way; however this cannot occur if the f's are
+%   split by a |\Ch| command.  Therefore, if at all possible, never
+%   split up the following character sequences with the |\Ch| command:
+%   |ff, fi, ffi, fl, ffl|.
+%   \begin{description}
+%    \item[Do:] |\Ch{C}{diffi}cult|
+%    \item[Don't:] |\Ch{C}{dif}ficult|
+%   \end{description}
+% 
+%  \item Ordering of songs in the songbook.  In order to allow \LaTeX2e{}
+%   to fill pages in as natural a manner as possible, it is best to
+%   order the songs within the songbook based upon a |wordbk| formatted
+%   songbook.  In that way, the words-only songbooks will contain
+%   optimally filled columns.  Start by placing the longest songs first,
+%   only inserting shorter songs to cause page breaks at logical
+%   intervals.
+% 
+%  \item Overheads that occupy more than one page.  When in overhead
+%   mode, if a song spills over onto a second page (or beyond), it is
+%   helpful to print an extra header at the top of the page identifying
+%   which song the extra page belongs to.  This is accomplished with the
+%   |\OHContPgHdr| macro.  For example, one would insert the following
+%   lines where the new page is to occur:
+%   \begin{verbatim}
+%       \OHContPgFtr
+%       \OHPageBrk
+%       \OHContPgHdr
+%   \end{verbatim}
+% \end{enumerate}
+% 
+% 
+% \section{Index/TOC Generation}
+% The \Songbook{} style provides facilities for title/first line index,
+% song key index and table of contents generation.  While this facility
+% is not yet completely developed, it is much better than it was in
+% early \Songbook{} releases, and it produces \emph{very} usable output!
+% 
+% \subsection{Table of Contents Generation}
+% Steps to follow in order to produce a table of contents:
+% \begin{enumerate}
+% 
+%  \item Add a |\makeTitleContents| command to the preamble of your
+%   songbook.
+% 
+%  \item Run \LaTeX2e{} on the songbook source.
+% 
+%  \item Make your own copy of \texttt{sampleToc.tex} and customize its
+%   header and footer definitions (so they match your songbook's).  Then
+%   change the name of the file being |\input|ed to match your table of
+%   contents file.
+% 
+%  \item Run \LaTeX2e{} on your copy of \texttt{sampleToc.tex}.
+% \end{enumerate}
+% 
+% \subsection{Title \& First Line Index Generation}
+% Steps to follow in order to produce a title and first line index:
+% \begin{enumerate}
+% 
+%  \item Add a |\makeTitleIndex| command to the preamble of your
+%   songbook.
+% 
+%  \item Run \LaTeX2e{} on the songbook source.
+% 
+%  \item Run the \texttt{./mksbtdx} shell script on the \texttt{.tIdx}
+%   file that was produced by the previous step.  Do this by typing
+%   ``\texttt{mksbtdx} \textit{jobname}'' at a UNIX command line.  For
+%   example, the index file for \texttt{sample-sb.tex} was produced by
+%   typing ``\texttt{mksbtdx sample-sb}''.
+% 
+%  \item Make your own copy of \texttt{sampleTdx.tex} and customize its
+%   header and footer definitions (so they match your songbook's).  Then
+%   change the name of the file being |\input|ed to match your index
+%   file.  (\texttt{./mksbtdx} told you this file's name).
+% 
+%  \item Run \LaTeX2e{} on your copy of \texttt{sampleTdx.tex}.
+% \end{enumerate}
+% 
+% \subsection{Song Key Index Generation}
+% Steps to follow in order to produce a song key index:
+% \begin{enumerate}
+% 
+%  \item Add a |\makeKeyIndex| command to the preamble of your
+%   songbook.
+% 
+%  \item Run \LaTeX2e{} on the songbook source.
+% 
+%  \item Run the \texttt{./mksbkdx} shell script on the \texttt{.kIdx}
+%   file that was produced by the previous step.  Do this by typing
+%   ``\texttt{mksbkdx} \textit{jobname}'' at a UNIX command line.  For
+%   example, the key index file for \texttt{sample-sb.tex} was produced
+%   by typing ``\texttt{mksbkdx sample-sb}''.
+% 
+%  \item Make your own copy of \texttt{sampleKdx.tex} and customize its
+%   header and footer definitions (so they match your songbook's).  Then
+%   change the name of the file being |\input|ed to match your index
+%   file. (\texttt{./mksbkdx} told you this file's name).
+% 
+%  \item Run \LaTeX2e{} on your copy of \texttt{sampleKdx.tex}.
+% \end{enumerate}
+% 
+% 
+% \section{Example}
+% Here is an example songbook; where the the songbook contains exactly
+% one song.
+% {\small\begin{verbatim}
+% \documentstyle[12pt]{book}
+% \usepackage[chordbk]{songbook}                %% Words & Chords edition.
+% 
+% %%
+% % C.C.L.I. license number definition; for copyright licensing info.
+% %%
+% \newcommand{\CCLInumber}{\#999999}
+% \newcommand{\CCLIed}{(CCLI \CCLInumber)}
+% \newcommand{\NotCCLIed}{}
+% \newcommand{\PGranted}{}
+% \newcommand{\PPending}{(Permission Pending)}
+% 
+% %%
+% % Turn on index and table of contents.
+% %%
+% \makeTitleIndex         %% Title and First Line Index.
+% \makeTitleContents      %% Table of Contents.
+% \makeKeyIndex           %% Song Key Index.
+% 
+% \begin{document}
+% %%
+% % Songbook begins.
+% %%
+% \begin{song}{What A Mighty God We Serve}{C}
+%   {\SBPubDom}
+%   {Unknown}
+%   {Isaiah 9:6}
+%   {\NotCCLIed}
+% 
+%   \renewcommand{\RevDate}{February~11,~1993}
+%   \SBRef{Give Thanks}{Hosanna! Music Tape HM-7}
+%   \SBRef{Hosanna! Music Book~I}{\#93}
+% 
+%   \begin{SBOpGroup}
+%     \Ch{C}{What} a mighty God we serve,
+% 
+%     What a mighty God we \Ch{G7}{serve},
+% 
+%     \Ch{C}{An}gels bow before Him,
+% 
+%     \Ch{C}{Hea}ven and earth adore Him,
+% 
+%     \Ch{C}{What} a mighty \Ch{G7}{God} we \Ch{C}{serve!}\Ch{[}{}\Ch{F}{}
+%       \Ch{C}{}\Ch{]}{}
+%   \end{SBOpGroup}
+% 
+%   \begin{SBVerse}
+%     O \Ch{C}{Zion,} O \Ch{F}{Zion,} that \Ch{G7}{bring}est good \Ch{C}{tid}ings,
+% 
+%     Get thee \Ch{F}{up} into the \Ch{G7}{High} Moun\Ch{C}{tains}
+% 
+%     Je\Ch{C}{ru}salem, Je\Ch{F}{ru}salem, that \Ch{G7}{bring}est good \Ch{C}{tid}ings
+% 
+%     Lift up thy \Ch{F}{voice} with \Ch{G7}{all} thy \Ch{C}{strength}
+% 
+%     Lift it \Ch{F}{up,} be not afraid;
+% 
+%     Lift it \Ch{C}{up,} be not afraid
+% 
+%     Say \Ch{Am}{unto} the \Ch{C}{ci}ties of \Ch{G7}{Judah,}
+% 
+%     ``Behold your \Ch{C}{God,}\Ch{C7}{} Behold your \Ch{F}{God,}
+% 
+%     Be\Ch{C}{hold} \Ch{G7}{your} \Ch{C}{God!''}
+%   \end{SBVerse}
+% 
+% \CBPageBrk
+%   \begin{SBExtraKeys}{%
+%     \STitle{What A Mighty God We Serve}{D}
+% 
+%     \begin{SBOpGroup}
+%       \Ch{D}{What} a mighty God we serve,
+% 
+%       What a mighty God we \Ch{A7}{serve},
+% 
+%       \Ch{D}{An}gels bow before Him,
+% 
+%       \Ch{D}{Hea}ven and earth adore Him,
+% 
+%       \Ch{D}{What} a mighty \Ch{A7}{God} we \Ch{D}{serve!}\Ch{[}{}\Ch{G}{}
+%         \Ch{D}{}\Ch{]}{}
+%     \end{SBOpGroup}
+% 
+%     \begin{SBVerse}
+%       O \Ch{D}{Zion,} O \Ch{G}{Zion,} that \Ch{A7}{bring}est good \Ch{D}{tid}ings,
+% 
+%       Get thee \Ch{G}{up} to into the \Ch{A7}{High} Moun\Ch{D}{tains}
+% 
+%       Je\Ch{D}{ru}salem, Je\Ch{G}{ru}salem, that \Ch{A7}{bring}est good
+%         \Ch{D}{tid}ings
+% 
+%       Lift up thy \Ch{G}{voice} with \Ch{A7}{all} thy \Ch{D}{strength}
+% 
+%       Lift it \Ch{G}{up} be not afraid,
+% 
+%       Lift it \Ch{D}{up} be not afraid
+% 
+%       Say \Ch{Bm}{unto} the \Ch{D}{ci}ties of \Ch{A7}{Judah,}
+% 
+%       ``Behold your \Ch{D}{God,}\Ch{D7}{} Behold your \Ch{G}{God,}
+% 
+%       Be\Ch{D}{hold} \Ch{A7}{your} \Ch{D}{God!''}
+%     \end{SBVerse}
+%   }\end{SBExtraKeys}
+% \end{song}
+% \end{document}
+% \bye
+% \end{verbatim}}
+% 
+% 
+% \section{Dependencies}
+% The \Songbook{} style is dependent upon four other \LaTeX2e{} styles:
+% \texttt{conditional.sty}, \texttt{calc.sty}, \texttt{ifthen.sty}, and
+% \texttt{multicol.sty}.
+% \texttt{Conditional.sty} is supplied with this package.
+% \texttt{Calc.sty}, \texttt{ifthen.sty}, and \texttt{multicol.sty} are
+% part of the \LaTeX2e{} distribution.
+% 
+% Embedding guitar chord fingering charts within a songbook can be 
+% accomplished with the \texttt{texchord.sty} package; which is supplied 
+% in the contrib directory of the \Songbook{} distribution.
+% 
+% 
+% \section{Files}
+% \begin{description}
+%   \item[conditionals.sty] Donald Arseneau's conditional tests.
+%   \item[mksbkdx] A shell script around makeindex to sort the song
+%     key index.
+%   \item[mksbtdx] A shell script around makeindex to sort the
+%     title \& first line index.
+%   \item[relnotes.txt] The \Songbook{} package release notes.
+%   \item[sample-sb.tex] A sample songbook.
+%   \item[sampleKdx.tex] Song key index for the sample songbook.
+%   \item[sampleTdx.tex] Title \& first line index for the sample
+%   songbook.
+%   \item[sampleToc.tex] TOC for the sample songbook.
+%   \item[songbook.ist] The \Songbook{} package makeindex \texttt{.ist} file.
+%   \item[songbook.dtx] The base style file.
+%   \item[songbook.inx] The install script used to create 
+%    \texttt{songbook.sty}.
+% \end{description}
+% 
+% \section{See Also}
+% Some resources you will find helpful when coding songbooks:
+% \begin{itemize}
+%   \item \textit{\LaTeX{} A Document Preparation System,} by Leslie Lamport
+%
+%   \item \textit{The \LaTeX{} Companion,} by Goossens, Mittlebach, \&~Samarin
+%
+%   \item The \Songbook{} homepage, at URL \texttt{http://rath.ca/Misc/Songbook/}
+% 
+%   \item \textit{The \TeX{} book,} by Donald Knuth
+% \end{itemize}
+% 
+% \changes{v4.1}{2003/08/31}{Added the Contributed Resources subsection.}
+% \subsection{Contributed Resources}
+% A couple of \Songbook{} users have created additional resources intended to 
+% be used with the \Songbook{} style.  If you have written anything which you
+% would like to contribute to \Songbook{} style's distribution, please let
+% me know.
+% \def\LyX{L\kern-.1667em\lower.25em\hbox{Y}\kern-.125emX\spacefactor1000}
+% \begin{description}
+%  \item[CarolBook] a \Songbook{} formatted book containing words for all the
+%    Christmas songs I've been able to find where the words are now in the
+%    public domain.  PDF versions of the file are included for quick
+%    and easy use.
+%
+%  \item[crd2sb] a perl script which converts Chord files into Songbook files.
+%    Contributed by Abel Chow $<$\texttt{abel@g2networks.com}$>$.  Note that
+%    a postscript formatter for Chord songs can be ftp'ed from:\\
+%    \texttt{ftp://ftp.uu.net/doc/music/guitar/resources/misc/CHORD/}.
+%
+%  \item[modulate] a perl script for modulating a song from one key to another.
+%    Contributed by Christopher Rath $<$\texttt{christopher@rath.ca}$>$.
+%
+%  \item[\LyX{} Integration] files for use of the \Songbook style with \LyX. 
+%   Christian Ridderstr\"{o}m $<$\texttt{chr@md.kth.se}$>$ has put together the 
+%   necessary files to allow \Songbook{}s to be edited using \LyX.  While 
+%   these files are not distributed in the \Songbook{}'s \texttt{contrib} 
+%   files, they are available from \\
+%   \texttt{http://www.md.kth.se/\~{}chr/lyx/songbook/Songbook.shtml}.
+%
+%  \item[texchord.sty] \LaTeX{} macros for printing guitar fingering charts.
+%    Contributed by Joel M. Hoffman $<$\texttt{joel@wam.umd.edu}$>$.  Note, 
+%    this style is \emph{no longer} actively supported by Joel.
+% \end{description}
+%
+% \subsection{Other Similar Packages}
+% There are a number of song and songbook formatting packages available
+% which attempt to provide similar functionality to the
+% \Songbook{} package (although, IMHO, my package is better).
+% Similar \LaTeX2e packages (of which the author is aware) include:
+% \begin{description}
+%  \item[chord.sty] a song formatting package based on \LaTeX{}'s article
+%   style; written by Olivier Biot (\texttt{http://www.biot.yucom.be/}).
+%   
+%  \item[Chordpack] a utility for typesetting \emph{chordpro} chord
+%   files in TeX; written by Daniel Polansky
+%   (\texttt{http://www.fi.muni.cz/\~{}xpolansk/home.html}) and\\ available
+%   at \texttt{http://www.fi.muni.cz/\~{}xpolansk/chordpack}.
+%   
+%  \item[gchords.sty] a TeX packages for typesetting guitar chord
+%   diagrams; written by Kasper Peeters
+%   (\texttt{http://www.damtp.cam.ac.uk/user/kp229/}) and available at
+%   \texttt{http://www.damtp.cam.ac.uk/user/kp229/gchords/}.
+%   
+%  \item[Guitar.sty] \LaTeX{} macros for typesetting guitar chords over
+%   song texts; written by Martin Väth
+%   (\texttt{http://www.mathematik.uni-wuerzburg.de/\~{}vaeth/}) and
+%   available from\\
+%   \texttt{http://www.mathematik.uni-wuerzburg.de/\~{}vaeth/download/}.
+%   
+%  \item[GuitarTeX] a graphical tool for editing \emph{chordpro} chord
+%   files and printing them in TeX; written by Joachim Miltz and
+%   available from\\ \texttt{http://www.rz-home.de/\~{}jmiltz/guitartex/}.
+%   
+%  \item[song.sty] a song formatting package based on \LaTeX{}'s book
+%   style; written by Jens T.~Berger Thielemann
+%   (\texttt{http://www.stud.ifi.uio.no/\~{}jensthi/}).
+% \end{description}
+% 
+% \section{Bugs}
+% In the specific case where a |\Ch|, |\Chr|, or |\ChX| macro begins a
+% paragraph that isn't inside one of \Songbook{}'s versicle environments,
+% that line may not indent properly in the |chordbk| substyle
+% (specifically, a long, wrapped line won't have its extra indentation).
+% I have been unable to identify the reason for the problem, although it
+% is easily reproducible.  The best way to avoid this problem is through
+% use of the |\SBOpGroup| environment.  If that isn't possible, the
+% problem may often be overcome by starting
+% such lines with an |\mbox{}| command; this inserts an empty (i.e., zero
+% width) mbox at the start of the line.  For example:
+% \begin{verbatim}
+%     \mbox{}\Ch{G}{Great} is the Lord \Ch{A}{even} beyond the
+%       \Ch{D}{borders} of I\Chr{F#m}{srae}\Ch{Bm7}{l;}
+% \end{verbatim}
+% 
+% The |\emph| macro is not completely compatible with |\Ch| and its friends.
+% The specific problem is that sharps can not be specified via `\#' within
+% an |\emph| macro.  The following snippet,
+% \begin{verbatim}
+%     \emph{for the \Ch{G/A}{King} of \Ch{F#}{kings.}}
+% \end{verbatim}
+% will fail with the \LaTeX2e{} message,
+% \begin{verbatim}
+%   ! Illegal parameter number in definition of \\reserved\@a.
+%   <to be read again>
+% \end{verbatim}
+% The error message can be supressed by replacing `\#' with `\#\#',
+% however this results in a double-sharp being typeset.  The problem can
+% be worked-around by replacing the snippet with:
+% \begin{verbatim}
+%     \emph{for the \Ch{G/A}{King} of} \Ch{F#}{\emph{kings.}}
+% \end{verbatim}
+% 
+% \section{Special Thanks}
+% Thanks to Donald Arseneau for writing the \texttt{conditionals.sty}
+% file, and for helping write the |\Chord| macro.  Donald, you are one
+% of the faithful who is always quick to reply with correct answers to
+% questions posted to |comp.text.tex|.  Thanks again.
+% 
+% Thanks also to Philip Hirschhorn whose |\Chord| macro I ultimately
+% used in versions~1.0--2.3 of the \Songbook{} style, and to Olivier
+% Boit who constructed a similar chord macro which I used to enhance
+% Philip's code for version~3.0
+% 
+% A quick thank you to Herbert Martin Dietze
+% $<$\texttt{herbert@fh-wedel.de}$>$ for noting that |SBVerse*| and its
+% cousins were missing from the \texttt{.sty} file, and then coding up
+% an acceptable |SBVerse*| which I could quickly use as a model for the
+% other two missing environments.
+%
+% For version~4.1, I am grateful to Mark Wooding for suggesting the 
+% method I ultimately used for implementing the |song| environment's
+% \meta{Include?} option (although I did not use his preferred
+% method).
+% 
+% \section{Author}
+% Christopher Rath
+%   \hskip 1cm \texttt{christopher@rath.ca}
+%   \hskip 1cm (613)~824-4584\\
+% 1371 Major Rd.\\
+% Orleans, ON\\
+% Canada \hskip .5cm K1E 1H3
+% 
+% \StopEventually{
+%   ^^A \PrintIndex
+%   ^^A \PrintChanges
+%
+% } ^^A end \StopEventually
+%
+% \newpage
+%
+% \section{\texttt{.dtx} Documentation Driver}
+% There is one last administrative detail to take care of before 
+% beginning the detailed review: the insertion of the documentation
+% driver (i.e., the code that builds the documentation \texttt{.dvi}
+% file.
+%
+%    \begin{macrocode}
+%<*driver>
+\documentclass{ltxdoc} \RequirePackage{calc} \EnableCrossrefs
+\CodelineIndex
+\RecordChanges                  % Gather update information
+ %\OnlyDescription  % comment out for implementation details
+ %\OldMakeindex     % use if your MakeIndex is pre-v2.9
+\setlength\hfuzz{15pt}  % dont make so many
+\hbadness=7000          % over and under full box warnings
+\def\MacroFont{\fontencoding\encodingdefault
+  \fontfamily\ttdefault
+  \fontseries\mddefault
+  \fontshape\updefault
+  \footnotesize}%
+
+\voffset=-1.00in
+\topmargin=0.5in
+\headheight=0.0in
+\headsep=0.20in
+\textheight=9.4in
+\footskip=0.4in
+
+\newenvironment{ParameterList}
+  {\par\hskip 1.5em Parameters:\begin{list}{}
+    {\setlength{\topsep}{0pt}
+      \setlength{\parsep}{0pt}
+      \setlength{\itemsep}{0pt}
+      \setlength{\leftmargin}{\leftmargin + 1.5em}
+      \setlength{\parsep}{0pt}
+    }
+  }
+  {\end{list}\vskip 0.5ex
+  }
+\newcommand{\parm}[1]{\texttt{[}\meta{#1}\texttt{]}}
+\begin{document}
+   \setcounter{IndexColumns}{1}
+   \DocInput{songbook.dtx}
+\end{document}
+%</driver>
+%    \end{macrocode} 
+%
+% \newpage
+%
+% \part{Detailed Documentation}
+% This section contains style implementation details
+% along with the detailed descriptions and documentation for the
+% \Songbook{} commands and environments.  It is strongly recommended
+% that these detailed descriptions be reviewed at least once as part
+% of becoming familiar with the \Songbook{} style.
+%
+% This coding style has been structured in a top down fashion which assume
+% that macros and environments must be declared before they are first used.
+% \TeX{} doesn't require this to be so, but since I've been coding software
+% this way for 20+ years, it's easier for me to also maintain this structure 
+% here too.
+%
+% \section{Identification Part}
+% The first section in \texttt{songbook.sty} is what \LaTeX2e{} calls
+% the \textit{Implementation Part}.  This is where \Songbook{} 
+% identifies itself to the outside world.  As part of this section
+% an RCS ``Id:'' variable has been included as a \TeX{} comment; the
+% intent is that this may assist with reporting problems later.
+%
+%    \begin{macrocode}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%                                                      %%
+%%        I D E N T I F I C A T I O N   P A R T         %%
+%%                                                      %%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%
+%% rcsid = @(#)$Id: songbook.dtx,v 1.11 2003/09/23 01:18:57 christopher Exp $
+%%
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{songbook}[2003/08/31 v4.1a All purpose Songbook style]
+\typeout{Document Subclass: songbook 2003/08/31 v4.1a All purpose Songbook style}
+%    \end{macrocode}
+%
+% \section{Initial Code Part}
+% The next section is called the \textit{Initial Code Part.}  This 
+% is where any dependencies in the early sections of
+% \texttt{songbook.sty} has are contained.  In the case of
+% the \Songbook{} style we must declare our dependence on
+% \texttt{calc.sty} here because some of \Songbook{}'s 
+% declarative sections themselves contain calculations.  In
+% this section we also declare the |\if| constructs used
+% in the package.
+%
+%    \begin{macrocode}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%                                                      %%
+%%          I N I T I A L   C O D E   P A R T           %%
+%%                                                      %%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%%========================================================
+%%  E A R L Y   P A C K A G E   D E P E N D E N C I E S  %
+%%========================================================
+%    \end{macrocode}
+%
+% Page layout calculations have become overly complex and 
+% so as of version~4.0 we now require \texttt{calc.sty} to make
+% them readable once again.  In every instance we could probably 
+% find a way to get along without \texttt{calc.sty}; however,
+% since the package is a part of the \LaTeX2e Base there is no
+% logical reason to avoid its use.
+%
+%    \begin{macrocode}
+\RequirePackage{calc}
+
+%    \end{macrocode}
+%
+% \subsection{If Constructs}
+% Most of these |\if| contructs are needed for use in the \textit{Delaration
+% Of Options} section of \texttt{songbook.sty}.  In each case, we create
+% the if statement (a.k.a. the flag) and then immediately set it to a
+% known value.  Where there are several flags which act as sort of radio
+% buttons, all of the flags are set so that none of them is selected; 
+% which has been done so that if we forget to deal with them properly
+% in the \textit{Declaration Of Options} code it will eventually manifest
+% itself as an error.
+%
+% Since the majority of the |\if|s have to be declared in this section,
+% we will go ahead and declare the remaining |\if|s as well.  It's 
+% simpler to maintain them when they are all in one place.
+%
+%    \begin{macrocode}
+%%========================================================
+%%              I F   C O N S T R U C T S                %
+%%========================================================
+%    \end{macrocode}
+%
+% \subsubsection{\Songbook{} Types}
+% At any time, only one of 
+% |\ifChordBk|, |\ifOverhead|, or |\ifWordBk| may be true.
+% These |\if|s correspond directly to the |chordbk|, |overhead|,
+% and |wordbk| options; one of which \emph{must} be used in the 
+% |\usepackage{}| statement used to invoke the \Songbook{} style.
+% All three flags are set to |\false|, and this fact is use later
+% in order to confirm that the user had specified one of the 
+% 3~options in their document.
+%
+% \begin{macro}{\ifChordBk}
+%   |\ifChordBk| is true if the user specified the |chordbk| option.
+%
+% \begin{macro}{\ifOverhead}
+%   |\ifOverhead| is true if the user specified the |overhead| option.
+%
+% \begin{macro}{\ifWordBk}
+%   |\ifWordBk| is true if the user specified the |wordbk| option.
+%
+%    \begin{macrocode}
+\newif\ifChordBk        \ChordBkfalse
+\newif\ifOverhead       \Overheadfalse
+\newif\ifWordBk         \WordBkfalse
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%
+% \subsubsection{\Songbook{} Subtypes}
+% A pair of |\if|s are declared to indicate
+% whether we are only typesetting words on the page (i.e., the flag is
+% false if we are typesetting words \emph{and} chords).  We are in words
+% only mode when the user has declared either the |overhead| or |wordbk|
+% options.  When these flags are first declared they are set to the same
+% value, false.
+%
+% \begin{macro}{\ifWordsOnly}
+%   |\ifWordsOnly| is true if we're in words-only mode.
+%
+% \begin{macro}{\ifNotWordsOnly}
+%   |\ifNotWordsOnly| always has a value oposite the of
+%   |\ifWordsOnly|.  |\ifNotWordsOnly| is false if we are in words-only 
+%   mode.
+%
+%    \begin{macrocode}
+\newif\ifWordsOnly      \WordsOnlyfalse
+\newif\ifNotWordsOnly   \NotWordsOnlyfalse
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+%
+% \subsubsection{Song Indicator}
+% \begin{macro}{\ifSBinSongEnv}
+%   The |\ifSBinSongEnv| flag is provided to the style
+%   or a songbook's author to detect if the current text is inside of a |song|
+%   environment.  This flag hasn't proven to be useful, but it doesn't hurt
+%   anything to leave it around; so, it hasn't been removed---who knows, there
+%   may well be a user somewhere making use of it!  The |song| environment
+%   takes care of setting this flag's status.
+%
+%    \begin{macrocode}
+\newif\ifSBinSongEnv    \SBinSongEnvfalse
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsubsection{Behaviour Flags}
+% There are three flags which can be set in order
+% to effect certain behaviours from the \Songbook{} style.  They are not
+% related to one another but have been grouped together since they are
+% they all |\if|s used to control \Songbook{} behaviour.
+%
+% \begin{macro}{\ifCompactSongMode}
+%   |\ifCompactSongMode| is set to true if you want
+%   songs presented in a compact mode.  It is initially set to false.
+%   This flag will \emph{only} be set to true by the user; the style
+%   itself does not toggle this flag.  Set this to true by specifying
+%   the |compactsong| option in the |\usepackage| statement.
+%
+% \changes{v4.1}{2003/08/31}{Added \\ifExcludeSong construct.}
+% \begin{macro}{\ifExcludeSong}
+%   |\ifExcludeSong| is set to true if you want to have the current
+%   song excluded from the songbook.  It is initially set to false,
+%   and would only be set to true inside a |song| environment, during
+%   processing of a song to be excluded.  Its value is set to true
+%   when you pass a value of ``\texttt{N}'' as the first (optional)
+%   parameter to a |song| environment.
+%
+% \changes{v4.1}{2003/08/31}{Added \\ifPrintAllSongs construct.}
+% \begin{macro}{\ifPrintAllSongs}
+%   |\ifPrintAllSongs| is set to true if you want to have \Songbook{}
+%   print all a songbook's songs regardless of what option may have been
+%   specified in each song.
+%
+% \begin{macro}{\ifSamepageMode}
+%   |\ifSamepageMode| indicates we want the \Songbook{} 
+%   style to try and keep each song together on the same page.  Set this
+%   true or false using the |\SamepageModetrue| and |\SamepageModefalse|
+%   commands, respectively.  Important note: this command has \emph{not}
+%   been documented in the \textit{High Level Documentation} section, above; 
+%   |\ifSamepageMode| is
+%   very unreliable.  The \LaTeX2e{} page breaking algorithms are not
+%   happy when this mode is used.  The the |song| environment description,
+%   below, for a further explanation.
+%
+% \begin{macro}{\ifSongEject}
+%   |\ifSongEject| is set to true if we
+%   want a new page generated at the end of every |song| environment.  A
+%   value of true means eject after every |song| environment (default value
+%   is true).  Set this true or false using the |\SongEjecttrue| and
+%   |\SongEjectfalse| commands, respectively.
+%
+%    \begin{macrocode}
+\newif\ifCompactSongMode\CompactSongModefalse
+\newif\ifExcludeSong	\ExcludeSongfalse
+\newif\ifPrintAllSongs	\PrintAllSongsfalse
+\newif\ifSamepageMode   \SamepageModefalse
+\newif\ifSongEject      \SongEjecttrue
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%
+% \subsubsection{Papesize Indicators}
+% This next set of flags are needed to track
+% the papersize specified by the user in then processed in the
+% \textit{Declaration Of Options} section.  This set of |\if|s are
+% mutually exclusive and only one of them should be true at any one time.
+% They are all initially set to false; setting of a default value is done
+% via an |\ExecuteOptions{}| clause, below.  These flags were created for
+% use by the \Songbook{} style itself, but have been made part of the 
+% public interface to simplify page layout coding related to paper
+% handling in a user's own songbook.
+%
+% \begin{macro}{\ifSBpaperA4}
+%   |\ifSBpaperA4| is true if papersize is A4.
+% \begin{macro}{\ifSBpaperA5}
+%   |\fSBpaperA5| is true if papersize is A5.
+% \begin{macro}{\ifSBpaperB5}
+%   |\ifSBpaperB5| is true if papersize is B5.
+% \begin{macro}{\ifSBpaperLtr}
+%   |\ifSBpaperLtr| is true if papersize is US~Letter.
+% \begin{macro}{\ifSBpaperLgl}
+%   |\ifSBpaperLgl| is true if papersize is US~Legal.
+% \begin{macro}{\ifSBpaperExc}
+%   |\ifSBpaperExc| is true if papersize is US~Executive Letter.
+%
+%    \begin{macrocode}
+\newif\ifSBpaperAfour   \SBpaperAfourfalse
+\newif\ifSBpaperAfive   \SBpaperAfivefalse
+\newif\ifSBpaperBfive   \SBpaperBfivefalse
+\newif\ifSBpaperLtr     \SBpaperLtrfalse
+\newif\ifSBpaperLgl     \SBpaperLglfalse
+\newif\ifSBpaperExc     \SBpaperExcfalse
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%
+% \subsection{Fonts}
+% Fonts are specified up-front in this section in order to simplify
+% the |\DeclareOption{}| clauses that follow (i.e., those clauses
+% need only make changes against these baseline settings).  The fonts
+% sizes and selections initially declared herein are those necessary
+% for |chordbk| songbooks.
+%
+% Fonts are handled by way of \LaTeX2e{} commands defined using the
+% |\newcommand| command.  This was done specifically so that traditional
+% \LaTeX2e{} font selection occurs in the context the \Songbook{}
+% font command is used.  I may have completely misunderstood how 
+% \LaTeX2e{} does its font selection, in which case my implementation
+% choice here is pointless; however, until proven otherwise\ldots here
+% it is.\footnote{Given that \texttt{doc.dtx} uses fonts in this fashion,
+% I feel I'm in pretty good company.}  Change these font specifiers via
+% \LaTeX2e's |\renewcommand.|
+%
+%    \begin{macrocode}
+%%========================================================
+%%                      F O N T S                        %
+%%========================================================
+%    \end{macrocode}
+%
+% \subsubsection{Chord Fonts}
+% These font selectors are used to determine how
+% chords are printed in words and chords songbooks:
+%
+% \begin{macro}{\ChBassFont}
+%   |\ChBassFont| sets the font for the bass note
+%   in chords as printed by the |\Ch|, |\Chr|, and |\ChX| commands.
+%
+% \begin{macro}{\ChBkFont}
+%   |\ChBkFont| sets the font for square brackets
+%   typeset by |\Ch|, |\Chr|, and |\ChX| commands.
+%
+% \begin{macro}{\ChFont}
+%   |\ChFont| sets the font for chords as printed
+%   by the |\Ch|, |\Chr|, and |\ChX| commands.  This used to be set to
+%   |\bf\sf| (i.e., cmss12 at 14.4pt).
+%
+%    \begin{macrocode}
+\newcommand{\ChBassFont}{\normalsize\bf\sf}     % = cmss12 at 12.0pt
+\newcommand{\ChFont}{\large\fontfamily{\sfdefault}%
+  \fontseries{sbc}\fontshape{n}\selectfont}     %=cmssbc12 at 14.4pt
+\newcommand{\ChBkFont}{\ChFont\fontseries{m}    %
+  \selectfont}                                  % =cmssm12 at 14.4pt
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%
+% \subsubsection{Title Block Fonts}
+% These font selectors are used to select
+% the fonts used in the Title Block that occurs that the start of
+% each song:
+%
+% \begin{macro}{\CpyRtFont}
+%   |\CpyRtFont| sets the font used to print the
+%   copyright symbol produced by the |\CpyRt| command.
+%
+% \begin{macro}{\CpyRtInfoFont}
+%   |\CpyRtInfoFont| sets the font used to print
+%   the copyright licensing information parameter of the |\song|
+%   environment; which appears after the copyright information
+%   parameter under the song title.
+%
+% \begin{macro}{\STitleFont}
+%   |\STitleFont| sets the font used to print the
+%   song title, as generated by the |\STitle| command.
+%
+% \begin{macro}{\STitleKeyFont}
+%   |\STitleKeyFont| sets the font used to print
+%   the key a song is written in, as generated by the |\STitle|
+%   command.
+%
+% \begin{macro}{\STitleNumberFont}
+%   |\STitleNumberFont| sets the font used to
+%   print the |\SBSongCnt| in front of the song title, as generated by
+%   the |\STitle| command.  This is one of two \Songbook{} font commands
+%   that are implemented using a real \LaTeX2e{} |\font| command; this
+%   turned out to be the easiest manner in which to obtain the desired
+%   fonts.  In order to make the |\STitleNumberFont|'s behaviour the
+%   the same as the other \Songbook{} font commands, the implementation
+%   is done indirectly; whereby the |\font| command is inserted into
+%   the |\STitleNumberFont| command so that it may be changed by the
+%   user in the same way as the other font commands in this package.
+%
+% \begin{macro}{\ScriptRefFont}
+%   |\ScriptRefFont| sets the font used to print
+%   the scripture reference generated by the |\ScriptRef| command.
+%
+% \begin{macro}{\WandMFont}
+%   |\WandMFont| sets the font used to print the
+%   lyricist and composer line generated by the |\WandM| command.
+%
+%    \begin{macrocode}
+\newcommand{\CpyRtFont}{\footnotesize}          % = cmr10  at 10pt
+\newcommand{\CpyRtInfoFont}{\tiny}              % = cmss8  at  8pt
+\newcommand{\STitleFont}{\large\bf\sf}          % = cmss12 at 14.4pt
+\newcommand{\STitleKeyFont}{\large}             % = cmr12  at 14.4pt
+\font\STNFont=cmtt12 at 20pt
+\newcommand{\STitleNumberFont}{\STNFont}        % = cmtt12 at 20pt
+\newcommand{\ScriptRefFont}{\footnotesize}      % = cmr10  at 10pt
+\newcommand{\WandMFont}{\footnotesize}          % = cmr10  at 10pt
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%
+% \subsubsection{Versicle Tag Fonts}
+% These font selectors are used to select
+% the fonts used to tag verses, choruses, bridges, and other elements
+% with which a song is constructed (e.g., verse numbers, ``Ch:''
+% chorus indicator, etc.):
+%
+% \begin{macro}{\SBBracketTagFont}
+%   |\SBBracketTagFont| sets the font used to
+%   create the tag for an |SBBracket| environment.
+%
+% \begin{macro}{\SBBridgeTagFont}
+%   |\SBBridgeTagFont| sets the font used to
+%   create the tag for an |SBBridge| environment.
+%
+% \begin{macro}{\SBChorusTagFont}
+%   |\SBChorusTagFont| sets the font used to
+%   print the chorus tag, |\SBChorusTag|.
+%
+% \begin{macro}{\SBEndTagFont}
+%   |\SBEndTagFont| sets the font used to
+%   print the tag, |\SBEndTag|, for the |\SBEnd| command.
+%
+% \begin{macro}{\SBIntroTagFont}
+%   |\SBIntroTagFont| sets the font used to
+%   print the introduction tag, |\SBIntroTag|.
+%
+% \begin{macro}{\SBOccursBrktFont}
+%   |\SBOccursBrktFont| sets the font used to
+%   create the large left and right square brackets used to delimit the
+%   |\SBOccurs| environment.
+%
+% \begin{macro}{\SBOccursTagFont}
+%   |\SBOccursTagFont| sets the font used to
+%   create the |\SBOccurs| tag.
+%
+% \begin{macro}{\SBVerseNumberFont}
+%   |\SBVerseNumberFont| sets the font used to
+%   print the |\SBVerseCnt| in front of verses in an |SBVerse| environment.
+%
+% \begin{macro}{\SBSectionNumberFont}
+%   |\SBSectionNumberFont| sets the font used to
+%   print the |\SBSectionCnt| in front of sections in an |SBSection|
+%   environment.
+%
+%    \begin{macrocode}
+\newcommand{\SBBracketTagFont}{\small\bf\sf}    % = cmss10 at 10.0pt
+\newcommand{\SBBridgeTagFont}{\SBEndTagFont}    % = cmss10 at 10.9pt
+\newcommand{\SBChorusTagFont}{\small\bf\sf}     % = cmss10 at 10.9pt
+\newcommand{\SBEndTagFont}{\small\bf\sf}        % = cmss10 at 10.9pt
+\newcommand{\SBIntroTagFont}{\SBEndTagFont}     % = cmss10 at 10.9pt
+\font\SBOBFont=cmss17 at 30pt
+\newcommand{\SBOccursBrktFont}{\SBOBFont}       % = cmss17 at 30pt
+\newcommand{\SBOccursTagFont}{\small\bf\sf}     % = cmss10 at 10.0pt
+\newcommand{\SBVerseNumberFont}{\small\bf\sf}   % = cmss10 at 10.9pt
+\newcommand{\SBSectionNumberFont}{\small\bf\sf} % = cmss10 at 10.9pt
+
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%
+% \subsubsection{Marginal Notes Fonts}
+% These font selectors are used to select
+% the fonts used when \Songbook{} commands make notations in the 
+% margin of the songbook:
+%
+% \begin{macro}{\SBMargNoteFont}
+%   |\SBMargNoteFont| sets the font used in the
+%   marginal reference printed by the |\SBMargNote| command.
+%
+% \begin{macro}{\SBRefFont}
+%   |\SBRefFont| sets the font used in the
+%   marginal reference printed by the |\SBRef| command.
+%
+%    \begin{macrocode}
+\newcommand{\SBMargNoteFont}{\scriptsize}       % = cmti8  at  8pt
+\newcommand{\SBRefFont}{\SBMargNoteFont}        % = cmti8  at  8pt
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+%
+% \subsubsection{Song Body Fonts}
+% These font selector command are used to 
+% select fonts which are used within the body of songs:
+%
+% \begin{macro}{\SBDefaultFont}
+%   |\SBDefaultFont| sets the default font for
+%   the songbook.  We will insert an occurrence of this command at the
+%   top of the songbook using the |\AtBeginDocument{}| clause, below.
+%
+% \begin{macro}{\SBLyricNoteFont}
+%   |\SBLyricNoteFont| sets the font used in
+%   comments placed within the lyrics giving musical direction.  This
+%   is the only font command commonly used by the writer of a songbook.
+%   For example, to tag a line to be sung only by the Cantor and
+%   another by everyone, one would write:
+%   \begin{verbatim}
+%      {\SBLyricNoteFont (Cantor)} Give thanks to the Lord.
+%
+%      {\SBLyricNoteFont (All)} His love endures forever.
+%   \end{verbatim}
+%
+%    \begin{macrocode}
+\newcommand{\SBDefaultFont}{\fontfamily{\rmdefault}%
+  \large}                                       % = cmr12  at 14.4pt
+\newcommand{\SBLyricNoteFont}{\footnotesize\sf} % = cmss10 at 10pt
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+%
+% \subsubsection{Other Fonts}
+% The remaining font selector commands:
+%
+% \begin{macro}{\SBOHContTagFont}
+%   |\SBOHContTagFont| sets the font used to
+%   print the |\OHContPgFtr| and |\OHContPgHdr|.
+% 
+%    \begin{macrocode}
+\newcommand{\SBOHContTagFont}{\small\bf\sf\itshape} % = cmss10 at 10.9pt
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsection{Configurable Dimensions}
+% In this section we define the spaces to leave in various situations.
+%
+% All of these spaces are defined as \LaTeX2e{} commands to overcome
+% limitations in length evaluation.  For example, if
+% |\LeftMarginSBVerse| were to be defined as a length, and then
+% immediately set to |4em|s the specific length would be evaluated with
+% respect to the current font.  This is not be what is desired;
+% instead a length evaluated with respect to the font in place at the
+% start of an |SBVerse| is what is desired.  This can only be done by
+% making these lengths \LaTeX2e{} commands.
+%
+%    \begin{macrocode}
+%%========================================================
+%%    C O N F I G U R A B L E   D I M E N S I O N S      %
+%%========================================================
+%    \end{macrocode}
+%
+% \subsubsection{Published Dimensions}
+% While the bulk of the declared dimensions have been created to make
+% the \Songbook{} style more user configurable, there are also some dimensions
+% which were created for internal use.  This first section describes the
+% user configurable dimensions:
+%
+% \begin{macro}{\HangAmt}
+%   |\HangAmt| is the amount to indent when a
+%   line wraps.  This has been defined using |\newcommand| instead of
+%   |\newlength| so that any unit definitions are evaluated at the
+%   time the |\HangAmt| command is used.
+%
+% \begin{macro}{\LeftMarginSBBracket}
+%   |\LeftMarginSBBracket| is the amount of
+%   left margin left in front of |SBBracket|s and |SBBracket*|s in
+%   the songbook.  The value for this variable has been chosen such
+%   that the song-words for |SBVerse|s, |SBChorus|es, and |SBBracket|s
+%   all align against the same left margin when printing standard
+%   words \&~chords songbooks.
+%
+% \begin{macro}{\LeftMarginSBChorus}
+%   |\LeftMarginSBChorus| is the amount of
+%   left margin left in front of named choruses in the songbook.
+%   In most cases |\LeftMarginSBChorus|, |\LeftMarginSBSection|, and
+%   |\LeftMarginSBVerse| should all be the same value.
+%
+% \begin{macro}{\LeftMarginSBSection}
+%   |\LeftMarginSBSection| is the amount of
+%   left margin left in front of sections in the songbook.
+%
+% \begin{macro}{\LeftMarginSBVerse}
+%   |\LeftMarginSBVerse| is the  amount of left 
+%   margin left in front of verses in the songbook.
+%
+% \begin{macro}{\SBChordRaise}
+%   |\SBChordRaise| is the  distance to raise 
+%   the chords above the baseline of the text they sit over.
+%
+% \begin{macro}{\SBRuleRaiseAmount}
+%   |\SBRuleRaiseAmount| is the  distance to 
+%   raise the rule (as specified by\\ |\SBIntersyllableRule|) which 
+%   fills the space between adjoining syllables.
+%
+% \begin{macro}{\SpaceAboveSTitle}
+%   |\SpaceAboveSTitle| is the  space skipped 
+%   by the |\STitle| macro before it prints the song title.
+%
+% \begin{macro}{\SpaceAfterTitleBlk}
+%   |\SpaceAfterTitleBlk| is the space inserted by the song environment
+%   between the \emph{title block} and the versicles.
+%
+% \begin{macro}{\SpaceAfterChorus}
+%   |\SpaceAfterChorus| is the  vertical space 
+%   to leave after an |SBChorus| environment.
+%
+% \begin{macro}{\SpaceAfterOpGroup}
+%   |\SpaceAfterOpGroup| is the  vertical space 
+%   to leave after an |SBOpGroup| environment.
+%
+% \begin{macro}{\SpaceAfterSBBracket}
+%   |\SpaceAfterSBBracket| is the vertical space to leave after an
+%   |SBBracket| environment.  This has proven troublesome to choose
+%   (see also |\SpaceBeforeSBBracket| because the |list| environment
+%   that produces the versicle inside of the |SBBracket| environment is
+%   itself enclosed inside of a math construct (which requires the
+%   |list| to have its vertical spacing supressed---otherwise the
+%   vertical line forming the left bracket encloses unnecessary
+%   whitespace).  The vertical spacing around a list is created by way
+%   of some nontrivial macros and can't simply be copied into some other
+%   context.  Thus, the choice of values for |\SpaceAfterSBBracket|
+%   and |\SpaceBeforeSBBracket| have been rather arbitrarily chosen.
+%
+% \begin{macro}{\SpaceAfterSection}
+%   |\SpaceAfterSection| is the  vertical space 
+%   to leave after an |SBSection| environment.
+%
+% \begin{macro}{\SpaceAfterSong}
+%   |\SpaceAfterSong| is the  vertical space to 
+%   leave after a song.
+%
+% \begin{macro}{\SpaceAfterVerse}
+%   |\SpaceAfterVerse| is the  vertical space to 
+%   leave after an |SBVerse| environment.
+%
+% \begin{macro}{\SpaceBeforeSBBracket}
+%   |\SpaceBeforeBBracket| is the vertical space to leave before an
+%   |SBBracket| environment.  None of the other versicles have an
+%   extra space inserted before them.  See |\SpaceAfterSBBracket|
+%   for further explanation.
+%
+%    \begin{macrocode}
+\newcommand{\HangAmt}            {1.5em}
+\newcommand{\LeftMarginSBBracket}{2.85em}
+\newcommand{\LeftMarginSBChorus} {4em}
+\newcommand{\LeftMarginSBSection}{\LeftMarginSBChorus}
+\newcommand{\LeftMarginSBVerse}  {\LeftMarginSBChorus}
+\newcommand{\SBChordRaise}       {2.25ex}
+\newcommand{\SBOldChordRaise}    {2.90ex}
+\newcommand{\SBRuleRaiseAmount}  {0.57ex}
+\newcommand{\SpaceAboveSTitle}   {0.5in}
+\newcommand{\SpaceAfterTitleBlk} {-1.75ex}
+\newcommand{\SpaceAfterChorus}   {\vspace{0ex plus0ex  minus3ex}}
+\newcommand{\SpaceAfterOpGroup}  {\vspace{0ex plus0ex  minus3ex}}
+\newcommand{\SpaceAfterSBBracket}{\vspace{2ex plus1ex  minus1ex}}
+\newcommand{\SpaceAfterSection}  {\vspace{0ex plus0ex  minus3ex}}
+\newcommand{\SpaceAfterSong}     {\vspace{0ex plus10ex minus3ex}}
+\newcommand{\SpaceAfterVerse}    {\vspace{0ex plus0ex  minus3ex}}
+\newcommand{\SpaceBeforeSBBracket}{\vspace{1ex plus1ex  minus1ex}}
+
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%
+% \subsubsection{Internal Dimensions}
+% These variables are used internally within \Songbook{} macros.  They are
+% not part of the published \texttt{songbook.sty} interface; but can be used
+% to tune some of its functions.
+%
+% \begin{macro}{\chSpaceTolerance}
+% \begin{macro}{\chMiniSpace}
+%   The |\chSpaceTolerance| and |\chMiniSpace| lengths are used in the |\Chr| macro.
+%
+% \begin{macro}{\sbBaselineSkipAmt}
+%   |\sbBaselineSkipAmt| is used internally in |SBVerse|, |SBChorus|, and all the
+%   other versicle environments; where hanging indentation has been accomplished
+%   using a specially defined list environment.  The value of |\sbBaselineSkipAmt|
+%   is recalculated immediately before each being used in each \emph{hanging indent}
+%   list.
+%
+%    \begin{macrocode}
+\newlength{\chSpaceTolerance}   \setlength{\chSpaceTolerance}{1.5mm}
+\newlength{\chMiniSpace}        \setlength{\chMiniSpace}     {0.3mm}
+\newlength{\sbBaselineSkipAmt}  \setlength{\sbBaselineSkipAmt}{0pt}
+
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%
+% \subsection{Declaration Of Non-Core Options}
+% In the \textit{Declaration Of Options} section of the \texttt{.sty}
+% file we deal with the various options which a user may specify in
+% the options part of the |\usepackage{songbook}| command.  Since the
+% \Songbook{} style accepts standard \LaTeX2e{} papersize options, we
+% deal with those in addition to the style's own options.  The
+% documentation of these options is broken into two parts: the core
+% options (|chordbk|, |wordbk|, \& |overhead|), and the non-core
+% options (all the rest).
+%
+% The \LaTeX2e{} documentation specifies that the options will be
+% processed in the order in which they are listed in the \texttt{.sty}
+% file.  We take advantage of this fact and cause all of the options
+% except the core three (|chordbk|, |wordbk|, \& |overhead|) to
+% simply set flags which indicate they were user-specified.  The core
+% options then do all the work.
+%
+%    \begin{macrocode}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%                                                      %%
+%%     D E C L A R A T I O N   O F   O P T I O N S      %%
+%%                                                      %%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%    \end{macrocode}
+%
+% \subsubsection{Papersize Options}
+% Paper selection options inherited from Book Class.  We process
+% these first in order to remember what paper size the user has
+% selected; before processing the \Songbook's own options.
+%
+% The code in each of these |\DeclareOption{}| clauses sets
+% the |\SBpaper|\ldots{} flags to unambiguously indicate which
+% papersize the user specified.
+%
+%    \begin{macrocode}
+%%=======================================================%
+%%          P A P E R S I Z E   O P T I O N S            %
+%%=======================================================%
+%    \end{macrocode}
+%
+% \begin{macro}{a4paper}
+%    \begin{macrocode}
+\DeclareOption{a4paper}{% Paper size: 210mm x 297mm
+  \SBpaperAfourtrue
+  \SBpaperAfivefalse
+  \SBpaperBfivefalse
+  \SBpaperLtrfalse
+  \SBpaperLglfalse
+  \SBpaperExcfalse
+}
+
+%    \end{macrocode}
+% \begin{macro}{a5paper}
+%    \begin{macrocode}
+\DeclareOption{a5paper}{% Paper size: 148mm x 210mm
+  \SBpaperAfourfalse
+  \SBpaperAfivetrue
+  \SBpaperBfivefalse
+  \SBpaperLtrfalse
+  \SBpaperLglfalse
+  \SBpaperExcfalse
+}
+
+%    \end{macrocode}
+% \begin{macro}{b5paper}
+%    \begin{macrocode}
+\DeclareOption{b5paper}{% Paper size: 176mm x 250mm
+  \SBpaperAfourfalse
+  \SBpaperAfivefalse
+  \SBpaperBfivetrue
+  \SBpaperLtrfalse
+  \SBpaperLglfalse
+  \SBpaperExcfalse
+}
+
+%    \end{macrocode}
+% \begin{macro}{letterpaper}
+%    \begin{macrocode}
+\DeclareOption{letterpaper}{% Paper size: 8.5in x 11in
+  \SBpaperAfourfalse
+  \SBpaperAfivefalse
+  \SBpaperBfivefalse
+  \SBpaperLtrtrue
+  \SBpaperLglfalse
+  \SBpaperExcfalse
+}
+
+%    \end{macrocode}
+% \begin{macro}{legalpaper}
+%    \begin{macrocode}
+\DeclareOption{legalpaper}{% Paper size: 8.5in x 14in
+  \SBpaperAfourfalse
+  \SBpaperAfivefalse
+  \SBpaperBfivefalse
+  \SBpaperLtrfalse
+  \SBpaperLgltrue
+  \SBpaperExcfalse
+}
+
+%    \end{macrocode}
+% \begin{macro}{executivepaper}
+%    \begin{macrocode}
+\DeclareOption{executivepaper}{% Paper size: 7.25in x 10.5in
+  \SBpaperAfourfalse
+  \SBpaperAfivefalse
+  \SBpaperBfivefalse
+  \SBpaperLtrfalse
+  \SBpaperLglfalse
+  \SBpaperExctrue
+}
+
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%
+% \subsubsection{Compactsong Option}
+%
+% This option tells the \Songbook{} style to present the songs in a
+% compact form.  For |chordbk| mode this means presenting the songs in
+% two columns per page using a smaller font.  When I can figure out
+% what this option should mean for the other modes I'll code them up.
+% In the mean time, |wordbk| and |overhead| modes simply ignore the
+% |compactsong| option.  Like the papersize options, the |compactsong|
+% processing here simply sets a flag; the actual code required to
+% implement |compactsong| mode is embedded below inside the three core
+% options.
+%
+%    \begin{macrocode}
+%%=======================================================%
+%%         C O M P A C T S O N G   O P T I O N           %
+%%=======================================================%
+%    \end{macrocode}
+% \begin{macro}{compactsong}
+%    \begin{macrocode}
+\DeclareOption{compactsong}{%
+  %%%
+  % Set flag to indicate the user wants compact song mode.
+  \CompactSongModetrue
+}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \changes{v4.1}{2003/08/31}{Added |printallsongs| option processing.}
+% \subsubsection{Printallsongs Option}
+%
+% This option tells the \Songbook{} style to print all songs in the
+% songbook, regardless of what has been specified in each song.  
+% Like the papersize options, the |printallsongs|
+% processing here simply sets a flag; the actual code required to
+% implement |printallsongs| mode is embedded below inside the |song|
+% environment.
+%
+%    \begin{macrocode}
+%%=======================================================%
+%%       P R I N T A L L S O N G S   O P T I O N         %
+%%=======================================================%
+%    \end{macrocode}
+% \begin{macro}{printallsongs}
+%    \begin{macrocode}
+\DeclareOption{printallsongs}{%
+  %%%
+  % Set flag to indicate the user wants to print all songs.
+  \PrintAllSongstrue
+}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsection{Declaration Of Core Options}
+% Now we deal with the Options which set up the songbook instances
+% appropriately; i.e., a ``words-only'', ``chords \& words'', or
+% ``overhead master'' book (|wordbk|, |chordbk|, \& |overhead|).
+% These option declarations take advantage of the fact that we have
+% already been told what paper size to design for.
+%
+% The style has been constructed on the underlying assumption that the
+% user \emph{must} specify one of the core options.  To that end, we
+% will later throw an error if none of these three options was
+% executed (done at |\AtBeginDocument| time, see the top of the
+% \textit{Main Code Part} for details).
+%
+%    \begin{macrocode}
+%%=======================================================%
+%%      S O N G B O O K   C O R E   O P T I O N S        %
+%%=======================================================%
+%    \end{macrocode}
+%
+% \subsubsection{\texttt{chordbk} Option}
+% \begin{macro}{chordbk}
+%   The |chordbk| option is executed here.
+%
+%   Each of the core options is structured similarly.  As as result,
+%   the documentation for the first one, |chordbk|, will be more 
+%   detailed, and the other two subsections will refer to this one.
+%
+%    \begin{macrocode}
+\DeclareOption{chordbk}{%
+%    \end{macrocode}
+%
+%   Set flags to indicate that we \emph{are} in |chordbk| mode.
+%   Set flags to indicate we are \emph{not} in words-only mode.
+%   Indicate that we \emph{do} want a page eject after every song.
+%    \begin{macrocode}
+  \ChordBktrue
+  \WordBkfalse
+  \Overheadfalse
+  \WordsOnlyfalse
+  \NotWordsOnlytrue
+  \SongEjecttrue
+
+%    \end{macrocode}
+%
+%   \paragraph{Page Layout}
+%   This first part specifies the page layout considerations.
+%  
+%   Page layout usage recommendation: copy the appropriate page layout
+%   commands to the preamble of your own document and customize them
+%   appropriately.  This will over-ride the default layout specified
+%   herein.  Use a structure like this one to handle the three
+%   songbook types automatically for your songbooks:
+%   \begin{verbatim}
+%     \ifChordBk
+%       <page layout for Words & Chords books>
+%     \else\ifWordBk
+%       <page layout for Words-Only books>
+%     \else\ifOverhead
+%       <page layout for Overhead masters>
+%     \fi\fi\fi
+%   \end{verbatim}
+%
+%   The only way I found to get these page layouts successfully built
+%   was to draw the various frames in a drawing package and then use a
+%   combination of page measurements and hand calculations to ensure I
+%   had everything done correctly.  One of the key concepts that had
+%   not been evident to me until just recently was that on even pages
+%   the |\marginparsep| and |\marginparwidth| variables exist \emph{inside}
+%   the |\evensidemargin|; this fact is not explicitly mentioned in
+%   any \LaTeX{} manual I have read, not even in ``The \LaTeX{} Companion''!
+%  
+%   The negative |\hoffset| and |\voffset| are to overcome the DVI
+%   driver default left and top margins of 1in, and all page layout
+%   commands herein assume these offsets have been ``unset'' in this
+%   fashion.
+%
+%    \begin{macrocode}
+  \voffset=-1.00in
+  \hoffset=-1.00in
+
+%    \end{macrocode}
+%
+%   Papersize-dependant processing.  In general we don't change
+%   anything except the page layout, however for smaller page
+%   sizes the some of the fonts are reduced to ensure that the
+%   songs fit reasonably onto the page.
+%
+%    \begin{macrocode}
+  \ifSBpaperAfour
+    \topmargin=0.5in
+    \headheight=0.21in
+    \headsep=0.2in
+    \textheight=10.0in
+    \footskip=0.19in
+    %
+    \oddsidemargin=0.618in
+    \evensidemargin=1.4in
+    \textwidth=6.25in
+    \marginparsep=0.2in
+    \marginparwidth=0.8in
+  \else\ifSBpaperAfive
+    \topmargin=6.0mm
+    \headheight=5.334mm
+    \headsep=2.666mm
+    \textheight=185.17mm
+    \footskip=4.826mm
+    %
+    \oddsidemargin=12.0mm
+    \evensidemargin=30.0mm
+    \textwidth=106.0mm
+    \marginparsep=3.68mm
+    \marginparwidth=20.32mm
+%    \end{macrocode}
+%
+%   Downsize the fonts to allow song to fit into the smaller A5
+%   papersize.
+%
+%    \begin{macrocode}
+    \renewcommand{\ChBassFont}{\small\bf\sf}        % = cmss12 at 11.0pt
+    \renewcommand{\ChFont}{\normalsize\fontfamily{\sfdefault}%
+      \fontseries{sbc}\fontshape{n}\selectfont}     %=cmssbc12 at 12.0pt
+    \renewcommand{\ChBkFont}{\ChFont\fontseries{m}  %
+      \selectfont}                                  % =cmssm12 at 12.0pt
+    \renewcommand{\SBDefaultFont}{\normalsize}      % = cmr12  at 12.0pt
+    \renewcommand{\SBOccursBrktFont}{\large\bf\sf}  % = cmss10 at 10.9pt
+  \else\ifSBpaperBfive
+    \topmargin=10.0mm
+    \headheight=5.334mm
+    \headsep=5.0mm
+    \textheight=214.84mm
+    \footskip=4.826mm
+    %
+    \oddsidemargin=20.0mm
+    \evensidemargin=34.0 mm
+    \textwidth=122.0mm
+    \marginparsep=3.68mm
+    \marginparwidth=20.32mm
+%    \end{macrocode}
+%
+%   Downsize the fonts to allow song to fit into the smaller B5
+%   papersize.
+%
+%    \begin{macrocode}
+    \renewcommand{\ChBassFont}{\small\bf\sf}        % = cmss12 at 11.0pt
+    \renewcommand{\ChFont}{\normalsize\fontfamily{\sfdefault}%
+      \fontseries{sbc}\fontshape{n}\selectfont}     %=cmssbc12 at 12.0pt
+    \renewcommand{\ChBkFont}{\ChFont\fontseries{m}  %
+      \selectfont}                                  % =cmssm12 at 12.0pt
+    \renewcommand{\SBDefaultFont}{\normalsize}      % = cmr12  at 12.0pt
+    \renewcommand{\SBOccursBrktFont}{\large\bf\sf}  % = cmss10 at 10.9pt
+  \else\ifSBpaperLtr
+    \topmargin=0.5in
+    \headheight=0.21in
+    \headsep=0.20in
+    \textheight=9.4in
+    \footskip=0.19in
+    %
+    \oddsidemargin=0.75in
+    \evensidemargin=1.5in
+    \textwidth=6.25in
+    \marginparsep=0.2in
+    \marginparwidth=0.8in
+  \else\ifSBpaperLgl
+    \topmargin=0.5in
+    \headheight=0.21in
+    \headsep=0.20in
+    \textheight=12.4in
+    \footskip=0.19in
+    %
+    \oddsidemargin=0.75in
+    \evensidemargin=1.5in
+    \textwidth=6.25in
+    \marginparsep=0.2in
+    \marginparwidth=0.8in
+  \else\ifSBpaperExc
+    \topmargin=0.25in
+    \headheight=0.21in
+    \headsep=0.165in
+    \textheight=9.435in
+    \footskip=0.19in
+    %
+    \oddsidemargin=0.5in
+    \evensidemargin=1.25in
+    \textwidth=5.5in
+    \marginparsep=0.2in
+    \marginparwidth=0.8in
+  \fi\fi\fi\fi\fi\fi
+
+%    \end{macrocode}
+%
+%   Enable ragged bottom.
+%
+%    \begin{macrocode}
+  \raggedbottom
+
+%    \end{macrocode}
+%
+%   \paragraph{CompactSong Processing}
+%
+%   Downsize fonts to allow song to fit into half the space (i.e., 
+%   two column mode); although the title will not be reset since
+%   it will be presented unchanged from normal chordbk mode.
+%
+%    \begin{macrocode}
+  \ifCompactSongMode
+    \renewcommand{\ChBassFont}{\small\bf\sf}        % = cmss12 at 11.0pt
+    \renewcommand{\ChFont}{\normalsize\fontfamily{\sfdefault}%
+      \fontseries{sbc}\fontshape{n}\selectfont}     %=cmssbc12 at 12.0pt
+    \renewcommand{\ChBkFont}{\ChFont\fontseries{m}  %
+      \selectfont}                                  % =cmssm12 at 12.0pt
+    \renewcommand{\SBDefaultFont}{\normalsize}      % = cmr12  at 12.0pt
+    \renewcommand{\SBOccursBrktFont}{\large\bf\sf}  % = cmss10 at 10.9pt
+
+%    \end{macrocode}
+%
+%   Multicol specific changes.
+%
+%    \begin{macrocode}
+    \setlength{\columnsep}{0.25in}
+
+%    \end{macrocode}
+%
+%   Remove side-margin, since marginal notes are not allowed when
+%   using multicol.sty.
+%
+%    \begin{macrocode}
+    \addtolength{\textwidth}     {\marginparsep + \marginparwidth}
+    \addtolength{\evensidemargin}{-\marginparsep - \marginparwidth}
+    \setlength  {\marginparsep}  {0in}
+    \setlength  {\marginparwidth}{0in}
+
+%    \end{macrocode}
+%
+%   Reduce minimum spacing amount used in |\Chr| macro (since we're
+%   now using a smaller font for lyrics and chords.
+%
+%    \begin{macrocode}
+    \setlength{\chSpaceTolerance}{1.0mm}
+
+%    \end{macrocode}
+%
+%   Remove the extra space before Verses, etc.
+%
+%    \begin{macrocode}
+    \renewcommand{\HangAmt}            {1.5em}
+    \renewcommand{\LeftMarginSBChorus} {2em}
+    \renewcommand{\LeftMarginSBSection}{\LeftMarginSBChorus}
+    \renewcommand{\LeftMarginSBVerse}  {\LeftMarginSBChorus}
+  \fi
+}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsubsection{\texttt{wordbk} Option}
+% \begin{macro}{wordbk}
+%   The |wordbk| option is executed here.
+%
+%    \begin{macrocode}
+\DeclareOption{wordbk}{%
+%    \end{macrocode}
+%
+%   Set flags to indicate we \emph{are} in wordbk mode.
+%   Set flags to indicate we \emph{are} in words-only mode.
+%   Indicate that we do \emph{not} want a page eject after every song.
+%
+%    \begin{macrocode}
+  \ChordBkfalse
+  \WordBktrue
+  \Overheadfalse
+  \WordsOnlytrue
+  \NotWordsOnlyfalse
+  \SongEjectfalse
+
+%    \end{macrocode}
+%
+%   Set fonts for |wordbk| use.
+%
+%    \begin{macrocode}
+  \renewcommand{\SBDefaultFont}{\normalsize}
+  \font\mySTNFont=cmtt12 at 17pt
+  \renewcommand{\STitleNumberFont}{\mySTNFont}
+  \renewcommand{\CpyRtFont}{\scriptsize}
+  \renewcommand{\WandMFont}{\scriptsize}
+  \renewcommand{\ScriptRefFont}{\scriptsize}
+  \renewcommand{\SBOccursBrktFont}{\large\bf\sf}
+
+%    \end{macrocode}
+%
+%   Reset a few of the song spacing amounts.
+%
+%    \begin{macrocode}
+  \renewcommand{\SpaceAboveSTitle}   {0.25in}
+  \renewcommand{\LeftMarginSBChorus} {1.5em}
+  \renewcommand{\LeftMarginSBSection}{\LeftMarginSBChorus}
+  \renewcommand{\LeftMarginSBVerse}  {\LeftMarginSBChorus}
+
+%    \end{macrocode}
+%
+% See the page layout comment in the |\DeclareOption{chordbk}|
+% section, above, for usage recommendations w.r.t. page layout
+% commands.
+%
+% The negative |\hoffset| and |\voffset| are to overcome the DVI driver
+% default left and top margins of 1in, and all page layout commands
+% herein assume these offsets have been ``unset'' in this fashion.
+%
+%    \begin{macrocode}
+  \voffset=-1.00in
+  \hoffset=-1.00in
+
+%    \end{macrocode}
+%
+%   Papersize-dependant processing.
+%
+%    \begin{macrocode}
+  \ifSBpaperAfour
+    \topmargin=0.5in
+    \headheight=0.21in
+    \headsep=0.2in
+    \textheight=10.0in
+    \footskip=0.19in
+    %
+    \oddsidemargin=0.618in
+    \evensidemargin=0.4in
+    \textwidth=7.25in
+    \marginparsep=0.0in
+    \marginparwidth=0.0in
+  \else\ifSBpaperAfive
+    \topmargin=6.0mm
+    \headheight=5.334mm
+    \headsep=2.666mm
+    \textheight=185.17mm
+    \footskip=4.826mm
+    %
+    \oddsidemargin=12.0mm
+    \evensidemargin=6.0mm
+    \textwidth=130.0mm
+    \marginparsep=0.0mm
+    \marginparwidth=0.0mm
+  \else\ifSBpaperBfive
+    \topmargin=10.0mm
+    \headheight=5.334mm
+    \headsep=5.0mm
+    \textheight=214.84mm
+    \footskip=4.826mm
+    %
+    \oddsidemargin=20.0mm
+    \evensidemargin=10.0mm
+    \textwidth=146.0mm
+    \marginparsep=0.0mm
+    \marginparwidth=0.0mm
+  \else\ifSBpaperLtr
+    \topmargin=0.5in
+    \headheight=0.21in
+    \headsep=0.10in
+    \textheight=9.4in
+    \footskip=0.29in
+    %
+    \oddsidemargin=0.75in
+    \evensidemargin=0.5in
+    \textwidth=7.25in
+    \marginparsep=0.0in
+    \marginparwidth=0.0in
+  \else\ifSBpaperLgl
+    \topmargin=0.5in
+    \headheight=0.21in
+    \headsep=0.20in
+    \textheight=12.4in
+    \footskip=0.19in
+    %
+    \oddsidemargin=0.75in
+    \evensidemargin=0.5in
+    \textwidth=7.25in
+    \marginparsep=0.0in
+    \marginparwidth=0.0in
+  \else\ifSBpaperExc
+    \topmargin=0.25in
+    \headheight=0.21in
+    \headsep=0.165in
+    \textheight=9.435in
+    \footskip=0.19in
+    %
+    \oddsidemargin=0.5in
+    \evensidemargin=0.25in
+    \textwidth=6.5in
+    \marginparsep=0.0in
+    \marginparwidth=0.0in
+  \fi\fi\fi\fi\fi\fi
+
+%    \end{macrocode}
+%
+%   Set ragged-right margins.
+%
+%    \begin{macrocode}
+  \raggedright
+
+%    \end{macrocode}
+%
+%   Do CompactSong processing, which at this time is nothing except
+%   resetting the |compactsong| flag back to false; to ensure that
+%   no |compactsong| processing occurs.  We take time to print a
+%   warning message for the user to remind them that the |compactsong|
+%   option will not have any effect at this time.
+%
+%    \begin{macrocode}
+  \ifCompactSongMode
+    \typeout{``compactsong'' mode not implemented for Wordbk mode.}
+    \CompactSongModefalse
+  \fi
+}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsubsection{\texttt{overhead} Option}
+% \begin{macro}{overhead}
+%   The |wordbk| option is executed here.
+%
+%    \begin{macrocode}
+\DeclareOption{overhead}{%
+%    \end{macrocode}
+%
+%   Set flags to indicate we \emph{are} in overhead mode.
+%   Set flags to indicate we \emph{are} in words-only mode.
+%   Indicate that we \emph{do} want a page eject after every song.
+%
+%    \begin{macrocode}
+  \ChordBkfalse
+  \WordBkfalse
+  \Overheadtrue
+  \WordsOnlytrue
+  \NotWordsOnlyfalse
+  \SongEjecttrue
+
+%    \end{macrocode}
+%
+%   Set fonts for |overhead| use.  Before doing any font stuff,
+%   change the regular sans serif font to demi-bold condensed.
+%
+%    \begin{macrocode}
+  \def\@mss{cmssdc10}
+  \renewcommand{\SBDefaultFont}{\LARGE\bf\sf}
+  \renewcommand{\STitleNumberFont}{\Large\sf}
+  \renewcommand{\STitleFont}{\LARGE\sf}
+  \renewcommand{\CpyRtFont}{\normalsize\rm}
+  \renewcommand{\CpyRtInfoFont}{\normalsize\rm}
+  \renewcommand{\WandMFont}{\normalsize\rm}
+  \renewcommand{\ScriptRefFont}{\normalsize\rm}
+  \renewcommand{\SBLyricNoteFont}{\normalsize\rm}
+  \renewcommand{\SBChorusTagFont}{\Large\sf}
+  \renewcommand{\SBVerseNumberFont}{\Large\sf}
+  \renewcommand{\SBSectionNumberFont}{\Large\sf}
+  \renewcommand{\SBOccursTagFont}{\Large\sf}
+  \renewcommand{\SBOccursBrktFont}{\huge\sf}
+  \renewcommand{\SBBracketTagFont}{\Large\sf}
+  \renewcommand{\SBOHContTagFont}{\Large\sf\itshape}
+
+%    \end{macrocode}
+%
+%   Reset a few of the song spacing amounts.
+%
+%    \begin{macrocode}
+  \renewcommand{\SpaceAboveSTitle}   {0.25in}
+  \renewcommand{\LeftMarginSBBracket}{2.25em}
+  \renewcommand{\LeftMarginSBChorus} {1.5em}
+  \renewcommand{\LeftMarginSBSection}{\LeftMarginSBChorus}
+  \renewcommand{\LeftMarginSBVerse}  {\LeftMarginSBChorus}
+
+%    \end{macrocode}
+%
+%   Reset the \baselinestretch.  For some reason I'm not getting good
+%   results with the default value.
+%
+%    \begin{macrocode}
+  \renewcommand{\baselinestretch}{.9}
+
+%    \end{macrocode}
+%
+%   See the page layout comment in the |\DeclareOption{chordbk}|
+%   section, above, for usage recommendations w.r.t. page layout
+%   commands.
+%
+%   General note re: |\textwidth| and overhead tranparencies: it is my
+%   personal experience that with font sizes used in overhead mode,
+%   a |\textwidth| of greater than 6in produces too wide an image for
+%   use in all situations.  Depending upon how you intend to use
+%   your overheads, you may be able to use a wider image, however
+%   if you are uncertain I strongly recommend you stick with the 6in
+%   |\textwidth| that is specified herein.
+%
+%   The negative |\hoffset| and |\voffset| are to overcome the DVI driver
+%   default left and top margins of 1in, and all page layout commands
+%   herein assume these offsets have been ``unset'' in this fashion.
+%
+%    \begin{macrocode}
+  \voffset=-1.00in
+  \hoffset=-1.00in
+
+%    \end{macrocode}
+%
+%   Papersize-dependant processing.
+%
+%    \begin{macrocode}
+  \ifSBpaperAfour
+    \topmargin=0.25in
+    \headheight=0.25in
+    \headsep=0.0in
+    \textheight=10.3in
+    \footskip=0.2in
+    %
+    \oddsidemargin=1.134in
+    \evensidemargin=1.134in
+    \textwidth=6.0in
+    \marginparsep=0.0in
+    \marginparwidth=0.0in
+  \else\ifSBpaperAfive
+    \topmargin=0.0mm
+    \headheight=5.334mm
+    \headsep=0.0mm
+    \textheight=193.666mm
+    \footskip=4.826mm
+    %
+    \oddsidemargin=9.0mm
+    \evensidemargin=9.0mm
+    \textwidth=130.0mm
+    \marginparsep=0.0mm
+    \marginparwidth=0.0mm
+  \else\ifSBpaperBfive
+    \topmargin=0.666mm
+    \headheight=5.334mm
+    \headsep=0.0mm
+    \textheight=229.0mm
+    \footskip=4.826mm
+    %
+    \oddsidemargin=15.0mm
+    \evensidemargin=15.0mm
+    \textwidth=146.0mm
+    \marginparsep=0.0mm
+    \marginparwidth=0.0mm
+  \else\ifSBpaperLtr
+    \topmargin=0.25in
+    \headheight=0.25in
+    \headsep=0.0in
+    \textheight=9.75in
+    \footskip=0.2in
+    %
+    \oddsidemargin=1.25in
+    \evensidemargin=1.25in
+    \textwidth=6.0in
+    \marginparsep=0.0in
+    \marginparwidth=0.0in
+  \else\ifSBpaperLgl
+    \topmargin=0.25in
+    \headheight=0.25in
+    \headsep=0.0in
+    \textheight=12.8in
+    \footskip=0.2in
+    %
+    \oddsidemargin=1.25in
+    \evensidemargin=1.25in
+    \textwidth=6.0in
+    \marginparsep=0.0in
+    \marginparwidth=0.0in
+  \else\ifSBpaperExc
+    \topmargin=0.25in
+    \headheight=0.21in
+    \headsep=0.0in
+    \textheight=9.6in
+    \footskip=0.19in
+    %
+    \oddsidemargin=0.625in
+    \evensidemargin=0.625in
+    \textwidth=6.0in
+    \marginparsep=0.0in
+    \marginparwidth=0.0in
+  \fi\fi\fi\fi\fi\fi
+
+%    \end{macrocode}
+%
+%   Set ragged-botton and ragged-right margins.
+%
+%    \begin{macrocode}
+  \raggedright
+  \raggedbottom
+
+%    \end{macrocode}
+%
+%   Do CompactSong processing, which at this time is nothing except
+%   resetting the |compactsong| flag back to false; to ensure that
+%   no |compactsong| processing occurs.  We take time to print a
+%   warning message for the user to remind them that the |compactsong|
+%   option will not have any effect at this time.
+%
+%    \begin{macrocode}
+  \ifCompactSongMode
+    \typeout{``compactsong'' mode not implemented for Overhead mode.}
+    \CompactSongModefalse
+  \fi
+}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsection{Execution Of Options}
+% Here we tell the the \Songbook{} style to execute the user's
+% declared options.
+%
+% First set up a default paper size, just in case the user didn't
+% specify one.  Then process the user specified options.  It is
+% mandatory for one of the songbook type options to be declared,
+% but rather than delare a default we will throw an error (see
+% below at the top of the \textit{Main Code Part}).
+%
+%    \begin{macrocode}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%                                                      %%
+%%       E X E C U T I O N   O F   O P T I O N S        %%
+%%                                                      %%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\ExecuteOptions{letterpaper}
+\ProcessOptions
+
+%    \end{macrocode}
+%
+% \subsection{Package Loading Part}
+% In this section of the style we load the remaining styles 
+% upon which the \Songbook{} style is dependant.
+%
+%    \begin{macrocode}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%                                                      %%
+%%       P A C K A G E   L O A D I N G   P A R T        %%
+%%                                                      %%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%    \end{macrocode}
+%
+% Donald Arseneau's \texttt{conditionals.sty}.  This style
+% is bundled with the \Songbook{} style (Donald has often posted
+% the macros to the USENET comp.text.tex newsgroup, but they
+% haven't been formally submitted to CTAN.
+%
+%    \begin{macrocode}
+\RequirePackage{conditionals}
+
+%    \end{macrocode}
+%
+% Leslie Lamport's \& David Carlilse's \texttt{ifthen.sty}.  This
+% style is part of the \LaTeX2e{} distribution.
+%
+%    \begin{macrocode}
+\RequirePackage{ifthen}
+
+%    \end{macrocode}
+%
+% If we are in |compactsong| mode then load Frank Mittelbach's
+% |multicol| package.  We specify the date of the 1.5u release;
+% since we make use of the |\columnbreak| command which was only
+% added in 1.5u.
+%
+%    \begin{macrocode}
+\ifCompactSongMode
+  \RequirePackage{multicol}[1999/05/25]
+\fi
+
+%    \end{macrocode}
+%
+% \subsection{Main Code Part}
+% The \textit{Main Code Part} is the main part of the style.  All
+% of the ``hard working'' macros are detailed below.
+%
+%    \begin{macrocode}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%                                                      %%
+%%              M A I N   C O D E   P A R T             %%
+%%                                                      %%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%    \end{macrocode}
+%
+% The user \emph{must} specify at least one of the |chordbk|, |wordbk|,
+% or |overhead| options; otherwise we throw an error.  This 
+% bit of code performs that check at the start of the users
+% document.
+%
+% We check to see if at least one of the core options have
+% been specified by the user by populating an |\hbox{}| with
+% the digit ``1'' if an option was specified.  If no core
+% option was specified then the |\hbox{}| will be empty and
+% we throw an error.
+%
+% \begin{macro}{\AtBeginDocument}
+%    \begin{macrocode}
+\AtBeginDocument{%
+  \setbox0=\hbox{}
+  %
+  \ifChordBk\setbox0=\hbox{1}\fi
+  \ifWordBk\setbox0=\hbox{1}\fi
+  \ifOverhead\setbox0=\hbox{1}\fi
+  %
+  \ifthenelse{\wd0 = 0}
+    {\errmessage{No songbook option (i.e., type) specified.  
+        Specify a songbook mode in your usepackage
+        statement; one of: [chordbk], [wordbk], or [overhead]}}
+    {\relax}
+
+%    \end{macrocode}
+%
+% If the user had specified one of the required options then we
+% continue with setting things up.  At present, the only housekeeping
+% item that needs attention is to set the default font for the 
+% songbook.  We do this by inserting the |\SBDefaultFont| here;
+% this lifts from the user the burden of having to remember to
+% specifying inside the songbook.
+%
+%    \begin{macrocode}
+  \SBDefaultFont
+}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsubsection{Constants \& Variables}
+% Define Counters used herein.
+%
+%    \begin{macrocode}
+%%========================================================
+%%      C O N S T A N T S   &   V A R I A B L E S        %
+%%========================================================
+
+%    \end{macrocode}
+%
+% \begin{macro}{\theSBSongCnt}
+%   The |\theSBSongCnt| counter is used for numbering the
+%   songs.  When a song is listed multiple times (for
+%   multiple keys) the songs number must remain the same
+%   each time.
+%
+% \begin{macro}{\theSBSectionCnt}
+%   The |\theSBSectionCnt| counter is used for numbering
+%   sections as they occur within a song.
+%
+% \begin{macro}{\theSBVerseCnt}
+%   The |\theSBVerseCnt| counter is used for numbering
+%   verses as they occur within a song.
+%
+%    \begin{macrocode}
+\newcounter{SBSongCnt}
+\newcounter{SBSectionCnt}
+\newcounter{SBVerseCnt}
+%    \end{macrocode}
+%
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%    \begin{macrocode}
+
+%    \end{macrocode}
+%
+% \paragraph{String Constants}
+% Declare string constants.
+%
+% These constants are provided so that users may easily customize
+% the appearance of formatted songs and songbooks.  Use the
+% |\renewcommand| command to change the value of these constants.
+%
+% \begin{macro}{\OHContPgFtrTag}
+%   The |\OHContPgFtrTag| tag is inserted by the |\OHContPgFtr| command.
+%   The default value for this is ``|continued on next page\ldots|''.
+%
+% \begin{macro}{\OHContPgHdrTag}
+%   The |\OHContPgHdrTag| tag is inserted by the |\OHContPgHdr| command.
+%   The default value for this is 
+%   ``|\theSBSongCnt\ --- \theSongTitle, continued\ldots|''.
+%
+% \begin{macro}{\SBBridgeTag}
+%   The |\SBBridgeTag| tag is inserted before the start of a bridge.
+%   The default value for this is ``|Bridge:|''.
+%
+% \begin{macro}{\SBChorusTag}
+%   The |\SBChorusTag| tag is inserted before the first line of a
+%   chorus.  The default value for this is ``|Ch:|''.
+%
+% \begin{macro}{\SBContinueTag}
+%   The |\SBContinueTag| tag is inserted in an |\SBContinueMark|.
+%   The default value for this is ``|cont\ldots|''.
+%
+% \begin{macro}{\SBEndTag}
+%   The |\SBEndTag| tag is inserted before the start of an
+%   ending (in an |\SBEnd| command).  The default value for this
+%   is ``|End:|''.
+%
+% \begin{macro}{\SBIntersyllableRule}
+%   The |\SBIntersyllableRule| tag is actually the command(s) used
+%   to draw the rule between adjoining syllables.
+%
+% \begin{macro}{\SBIntroTag}
+%   The |\SBIntroTag| tag is inserted before the start of an
+%   introduction (in an |\SBIntro| command).  The default value
+%   for this is ``|Intro:|''.
+%
+% \begin{macro}{\SBPubDom}
+%   The |\SBPubDom| tag is used to indicate that a song is in the public
+%   domain.  The default value for this is ``|Public Domain|''.  If you 
+%   want to localize this string in the song title block, be sure to use
+%   this public interface: the |\CpyRt| macro uses |\SBPubDom| to
+%   determine whether or not to print the copyright symbol (\copyright).
+%
+% \begin{macro}{\SBUnknownTag}
+%   The |\SBUnknownTag| tag is used with the |\WAndM| command and is the
+%   string to insert when either the author/artist or the copyright holder
+%   is unknown.  The default value for this is ``|Unknown|''.
+%
+% \begin{macro}{\SBWAndMTag}
+%   The |\SBWAndMTag| the tag is insert before the words and music
+%   entry printed in the song header.  The default value for this is
+%   ``|W&M:|''.
+%
+% \begin{macro}{\Songbook}
+%   The macro used to print this style's name.  The `b' in the word
+%   songbook has been replace with a flat ($\flat$).
+%
+%    \begin{macrocode}
+\newcommand{\OHContPgFtrTag}     {continued on next page\ldots}
+\newcommand{\OHContPgHdrTag}     {\theSBSongCnt\ --- \theSongTitle, continued\ldots}
+\newcommand{\SBBridgeTag}        {Bridge:}
+\newcommand{\SBChorusTag}        {Ch:}
+\newcommand{\SBContinueTag}      {cont\ldots}
+\newcommand{\SBEndTag}           {End:}
+\newcommand{\SBIntersyllableRule}{\hrulefill}
+\newcommand{\SBIntroTag}         {Intro:}
+\newcommand{\SBPubDom}           {Public Domain}
+\newcommand{\SBUnknownTag}       {Unknown}
+\newcommand{\SBWAndMTag}         {W\&M:}
+\newcommand{\Songbook}           {\textrm{Song$\flat$ook}}
+
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%
+% \paragraph{Internal Song Variables}
+% Declare song attribute variables.
+%
+% These variables are intended for consumption within the songbook
+% style itself, so they will \emph{not} be documented in the 
+% \textit{High Level Documentation} section, above.
+%
+% \begin{macro}{\theSongComposer}
+%   |\theSongComposer| is the composer and lyricist of the last song.
+%
+% \begin{macro}{\theSongKey}
+%   |\theSongKey| is the key of the last song.  This variable must be
+%   reset within the |\STitle| command, as well as at the
+%   start of the song environment, because of the way in
+%   which extra keys are handled.
+%
+% \begin{macro}{\theSongLicense}
+%   |\theSongLicense| is the copyright license info.
+%
+% \begin{macro}{\theSongTitle}
+%   |\theSongTitle| is the title of the last song.
+%
+% \begin{macro}{\theCopyRtInfo}
+%   |\theCopyRtInfo| is the copyright information of the last song.
+%   This includes the copyright licensing information.
+%
+% \begin{macro}{\theScriptureRef}
+%   |\theScriptureRef| is the scripture reference of the last song.
+%
+% \begin{macro}{\theXlatnBy}
+%   |\theXlatnBy| is who translated the song.
+%
+% \begin{macro}{\theXlatnPerm}
+%   |\theXlatnPerm| is the permission details for the last song
+%   translation.  This variable is reset to an empty
+%   string at the start of each song environment.
+%
+% \begin{macro}{\theXlatnTitle}
+%   |\theXlatnTitle| is the title of the last song-translation.  This
+%   variable is reset to an empty string at the start of
+%   each song environment.
+%
+%    \begin{macrocode}
+\newcommand{\theSongComposer}{the Composer}
+\newcommand{\theSongCopyRt}{the Copyright}
+\newcommand{\theSongKey}{the Key}
+\newcommand{\theSongLicense}{the License}
+\newcommand{\theSongScriptRef}{the Scripture}
+\newcommand{\theSongTitle}{the Title}
+\newcommand{\theXlatnBy}{the Translator}
+\newcommand{\theXlatnPerm}{the Permission}
+\newcommand{\theXlatnTitle}{the Translation Title}
+
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%
+% \subsubsection{Special Characters}
+% Some macros to ease the entry of special characters in songbooks.
+%
+%    \begin{macrocode}
+%%=======================================================%
+%%          S P E C I A L   C H A R A C T E R S          %
+%%=======================================================%
+
+%    \end{macrocode}
+%
+% \begin{macro}{\SBem}
+%   |\SBem| --- em-dash macro definition.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+% Generate an em-dash within a songbook.  This macro is used to place
+% in em-dash within text when we're \emph{not} in words-only mode.  This
+% allows us to place dashes within text in order place a chord earlier 
+% than a sylable; yet, that dash will not appear in the words-only book. 
+% The words-only version of this macro is a no-op.  Example of intended 
+% use:
+%
+%    \begin{macrocode}
+\newcommand{\SBem}{\ifWordsOnly\relax\else---\fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\SBen}
+%   |\SBen| --- en-dash macro definition.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%   Generate an en-dash within a songbook.  This macro is used to place
+%   in en-dash within text when we're \emph{not} in words-only mode; just like
+%   |\SBem|.  The words-only version of this macro is a no-op.
+%
+%    \begin{macrocode}
+\newcommand{\SBen}{\ifWordsOnly\relax\else--\fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\SBContinueMark}
+%   |\SBContinueMark| --- conditionally produce a continuation symbol.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%   If the contents of |\rightmark| will result in nothing being typeset, 
+%   then don't output the continuation mark; otherwise, output a 
+%   continuation mark using the |\SBContinueTag| command.
+%%%
+%    \begin{macrocode}
+\newcommand{\SBContinueMark}{%
+  \setbox0=\hbox{\rightmark}
+  \ifthenelse{\lengthtest{\wd0 = 0pt}}
+  {\relax}%
+  {\SBContinueTag}%
+  }
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\OHContPgFtr}
+%   |\OHContPgFtr| --- macro to print page footing continuation 
+%   headers on overheads.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%   This macro must be manually inserted where needed.  It is
+%   generally used in conjunction with the |\OHPageBrk| and |\OHPageHdr|
+%   macros.  |\OHContPgFtr| is a no-op, except when |\ifOverhead| is true.
+%
+%    \begin{macrocode}
+\newcommand{\OHContPgFtr}{%
+  \ifOverhead
+    \vskip .25in
+    \centerline{\SBOHContTagFont\OHContPgFtrTag}
+  \else%
+    \relax%
+  \fi}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\OHContPgHdr}
+%   |\OHContPgHdr| --- macro to print page heading continuation
+%   headers on overheads.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%   This macro must be manually inserted where needed.  It is
+%   generally used in conjunction with the |\OHPageBrk| macro.
+%   |\OHContPgHdr| is a no-op, except when |\ifOverhead| is true.
+%
+%    \begin{macrocode}
+\newcommand{\OHContPgHdr}{%
+  \ifOverhead
+    \centerline{\SBOHContTagFont\OHContPgHdrTag}
+    \vskip .25in
+  \else%
+    \relax%
+  \fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsubsection{Table Of Contents \& Indices}
+% The macros used to create the \textit{Key Index}, the 
+% \textit{Title \& First Line Index}, and the \texttt{Table
+% Of Contents}.  Planned enhancements are the addition of
+% a \textit{Scripture Index} and a \textit{Artist Index};
+% i.e., an index of the |\ScriptRef{}| and |\WandM{}|
+% entries, respectively.
+%
+% Most of the specific code involved in managing the index files
+% and writing the entries was copied from \texttt{latex.tex} (version~2.09)
+% and then modified to suit our purposes here.
+%
+%    \begin{macrocode}
+%%=======================================================%
+%%          T A B L E   O F   C O N T E N T S            %
+%%                                                       %
+%%                A N D   I N D I C E S                  %
+%%=======================================================%
+%    \end{macrocode}
+%
+% \begin{macro}{\makeKeyIndex}
+%   |\makeKeyIndex| starts the creation of an index of songs 
+%   by key.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%    \begin{macrocode}
+\def\makeKeyIndex{\if@filesw \newwrite\@keyIndexfile
+  \immediate\openout\@keyIndexfile=\jobname.kIdx
+  \def\keyIndex{\@bsphack\begingroup
+             \def\protect####1{\string####1\space}\@sanitize
+             \@wrKeyIndex}\typeout
+  {Writing index file \jobname.kIdx }\fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\keyIndex}
+%   |\keyIndex|\parm{1}\parm{2} makes an entry in the index of songs
+%   by key.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Song key and title.
+%     \item[\meta{2}] Song number.
+%   \end{ParameterList}
+%
+%    \begin{macrocode}
+\def\@wrKeyIndex#1#2{\let\thepage\relax
+   \xdef\@gtempa{\write\@keyIndexfile{\string
+      \indexentry{#1}{#2}}}\endgroup\@gtempa
+   \if@nobreak \ifvmode\nobreak\fi\fi\@esphack}
+
+\def\keyIndex{\@bsphack\begingroup \@sanitize\@keyIndex}
+
+\def\@keyIndex#1#2{\endgroup\@esphack}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\makeTitleIndex}
+%   |\makeTitleIndex| starts creation of a title \& first line index.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%    \begin{macrocode}
+\def\makeTitleIndex{\if@filesw \newwrite\@titleIndexfile
+  \immediate\openout\@titleIndexfile=\jobname.tIdx
+  \def\titleIndex{\@bsphack\begingroup
+             \def\protect####1{\string####1\space}\@sanitize
+             \@wrTitleIndex}\typeout
+  {Writing index file \jobname.tIdx }\fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\titleIndex}
+%   |\titleIndex|\parm{1}\parm{2} makes an entry in the title \&
+%   first line index.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Song title or first line.
+%     \item[\meta{2}] Song number.
+%   \end{ParameterList}
+%
+%    \begin{macrocode}
+\def\@wrTitleIndex#1#2{\let\thepage\relax
+   \xdef\@gtempa{\write\@titleIndexfile{\string
+      \indexentry{#1}{#2}}}\endgroup\@gtempa
+   \if@nobreak \ifvmode\nobreak\fi\fi\@esphack}
+
+\def\titleIndex{\@bsphack\begingroup \@sanitize\@titleIndex}
+
+\def\@titleIndex#1#2{\endgroup\@esphack}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\makeTitleContents}
+%   |\makeTitleContents| starts creation of a table of contents.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%    \begin{macrocode}
+\def\makeTitleContents{\if@filesw \newwrite\@titleContentsfile
+  \immediate\openout\@titleContentsfile=\jobname.toc
+  \def\titleContents{\@bsphack\begingroup
+             \def\protect####1{\string####1\space}\@sanitize
+             \@wrTitleContents}\typeout
+  {Writing table of contents file \jobname.toc }\fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\titleContents}
+%   |\titleContents|\parm{1}\parm{2} makes an entry in the table
+%   of contents file.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Song number.
+%     \item[\meta{2}] Song title.
+%   \end{ParameterList}
+%
+%    \begin{macrocode}
+\def\@wrTitleContents#1#2{\let\thepage\relax
+   \xdef\@gtempa{\write\@titleContentsfile{\string
+       \item\ \theSBSongCnt. #1\protect\hbox{, \thepage}}}\endgroup\@gtempa
+   \if@nobreak \ifvmode\nobreak\fi\fi\@esphack}
+
+\def\titleContents{\@bsphack\begingroup \@sanitize\@titleContents}
+
+\def\@titleContents#1#2{\endgroup\@esphack}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\SBtocSEntry}
+%   |\SBtocSEntry| is the macro that encloses each skipped song TOC entry.
+%   The intent is that when you format your skipped TOC list you redefine
+%   |\SBtocSEntry| appropriately (assuming you are not happy with the
+%   default value).
+%   \begin{ParameterList}
+%     \item[\meta{1}] Song number.
+%     \item[\meta{2}] Song title.
+%     \item[\meta{3}] Page number.
+%   \end{ParameterList}
+%
+%    \begin{macrocode}
+\newcommand{\SBtocSEntry}[3]{#1. \textit{#2}\hbox{, #3}}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\makeTitleContentsSkip}
+%   |\makeTitleContentsSkip| starts creation of a table of contents
+%   of songs excluded from the songbook.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%    \begin{macrocode}
+\def\makeTitleContentsSkip{\if@filesw \newwrite\@titleContentsSkipfile
+  \immediate\openout\@titleContentsSkipfile=\jobname.tocS
+  \def\titleContentsSkip{\@bsphack\begingroup
+             \def\protect####1{\string####1\space}\@sanitize
+             \@wrTitleContentsSkip}\typeout
+  {Writing table of contents (skipped) file \jobname.tocS }\fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\titleContentsSkip}
+%   |\titleContentsSkip|\parm{1}\parm{2} makes an entry in the table
+%   of contents file.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Song number.
+%     \item[\meta{2}] Song title.
+%   \end{ParameterList}
+%
+%    \begin{macrocode}
+\def\@wrTitleContentsSkip#1#2{\let\thepage\relax
+   \xdef\@gtempa{\write\@titleContentsSkipfile{\string
+       \item\ \protect\SBtocSEntry{\theSBSongCnt}{#1}{\thepage}}}\endgroup\@gtempa
+   \if@nobreak \ifvmode\nobreak\fi\fi\@esphack}
+
+\def\titleContentsSkip{\@bsphack\begingroup \@sanitize\@titleContentsSkip}
+
+\def\@titleContentsSkip#1#2{\endgroup\@esphack}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\FLineIdx}
+%   |\FLineIdx|\parm{1} adds a first line of song entry to
+%   the song \& title index file~(\texttt{.idx}).
+%   \begin{ParameterList}
+%     \item[\meta{1}] First line of song.
+%   \end{ParameterList}
+%
+%    \begin{macrocode}
+\newcommand{\FLineIdx}[1]{\titleIndex{#1@{\it #1\/}}{\theSBSongCnt}}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsubsection{Some Other Hooks}
+% The macros have been provided to allow the user additional control
+% of songbooks created by the \Songbook{} package.
+%
+%    \begin{macrocode}
+%%=======================================================%
+%%           S O M E   O T H E R   H O O K S             %
+%%=======================================================%
+
+%    \end{macrocode}
+%
+% \begin{macro}{\SBChorusMarkright}
+%   The |\SBChorusMarkright|\parm{1} hook to allow |\SBSection|'s |\markright|
+%   to be overridden.
+%
+%    \begin{macrocode}
+\newcommand{\SBChorusMarkright}[1]{\markright{#1}}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\SBVerseMarkright}
+%   The |\SBVerseMarkright|\parm{1} hook to allow |\SBVerse|'s |\markright|
+%   to be overridden.
+%
+%    \begin{macrocode}
+\newcommand{\SBVerseMarkright}[1]{\markright{#1}}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\SBSectionMarkright}
+%   The |\SBSectionMarkright|\parm{1} hook to allow |\SBSection|'s |\markright|
+%   to be overridden.
+%
+%    \begin{macrocode}
+\newcommand{\SBSectionMarkright}[1]{\markright{\alph{#1}}}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\SongMarkboth}
+%   The |\SongMarkboth|\parm{1}\parm{2} hook to allow the song environment's |\markboth|
+%   to be overridden.
+%
+%    \begin{macrocode}
+\newcommand{\SongMarkboth}[2]{\markboth{#1}{#2}}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\STitleMarkboth}
+%   The |\STitleMarkboth|\parm{1}\parm{2} hook to allow |\Stitle|'s |\markboth| to be
+%   overridden.
+%
+%    \begin{macrocode}
+\newcommand{\STitleMarkboth}[2]{\markboth{#1}{#2}}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsubsection{Miscellaneous Macros}
+% This section contains a few miscellaneous macros used by the
+% main macros that then follow.
+%
+%    \begin{macrocode}
+%%=======================================================%
+%%       M I S C E L L A N E O U S   M A C R O S         %
+%%=======================================================%
+
+%    \end{macrocode}
+%
+% \begin{macro}{\CpyRt}
+%   The |\CpyRt|\parm{1}\parm{2}\parm{3} copyright info. macro definition.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Centre this line Y/N? (optional)
+%     \item[\meta{2}] Copyright information.
+%     \item[\meta{3}] Copyright licensing information.
+%   \end{ParameterList}
+%
+% This command is not usually explicitly used in a songbook.  It is
+% called by the |song| environment and will normally only be used
+% there.
+%
+% The first parameter to this macro is optional and is used to surpress
+% the centering of the Scripture reference (i.e., if the parameter is
+% specified, and that value is \emph{not} `\texttt{Y}' then the center
+% environment will not be created around the reference.
+%
+%    \begin{macrocode}
+\newcommand{\CpyRt}[3][Y]{%
+  \if#1Y\begin{center}\fi
+    \if\blank{#2}%
+      \if\blank{#3}%
+        {\CpyRtFont\copyright \SBUnknownTag{} \CpyRtInfoFont}%
+      \else
+        {\CpyRtFont\copyright \SBUnknownTag{} \CpyRtInfoFont #3}%
+      \fi%
+    \else%
+      \ifthenelse{\equal{#2}{\SBPubDom}}
+      {%then
+        {\CpyRtFont #2 \CpyRtInfoFont #3}%
+      }{%else
+        {\CpyRtFont\copyright #2 \CpyRtInfoFont #3}%
+      }%fi
+    \fi%
+  \if#1Y\end{center}\fi
+}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\ScriptRef}
+%   The |\ScriptRef|\parm{1}\parm{2} macro indicates a scripture reference.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Centre this line Y/N? (optional)
+%     \item[\meta{2}] Address of scripture reference for the song.
+%   \end{ParameterList}
+%
+% Used to indicate a scripture reference for the song.  May either be
+% the scripture being quoted in the song, or a scripture which
+% supports the theology presented in the song.
+%
+% The first parameter to this macro is optional and is used to surpress
+% the centering of the Scripture reference (i.e., if the parameter is
+% specified, and that value is \emph{not} `\texttt{Y}' then the center
+% environment will not be created around the reference.
+%
+%    \begin{macrocode}
+\newcommand{\ScriptRef}[2][Y]{%
+  \if#1Y\begin{center}\fi
+    {\ScriptRefFont #2}%
+  \if#1Y\end{center}\fi
+}
+
+%    \end{macrocode}
+% \end{macro}
+
+%
+% \begin{macro}{\WAndM}
+%   The |\WAndM|\parm{1}\parm{2} macro indicates Words and Music authorship.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Centre this line Y/N? (optional)
+%     \item[\meta{2}] Name(s) of the composer and lyricist.
+%   \end{ParameterList}
+%
+% This command is not usually explicitly used in a songbook.  It is
+% called by the song environment and will normally only be used
+% there.
+%
+% The first parameter to this macro is optional and is used to surpress
+% the centering of the composer \& lyricist (i.e., if the parameter is
+% specified, and that value is \emph{not}~`\texttt{Y}' then the center environment will
+% not be created around the composer \& lyricist.
+%
+%    \begin{macrocode}
+\newcommand{\WAndM}[2][Y]{%
+  \if#1Y\begin{center}\fi
+    \if\blank{#2}%
+      {\WandMFont\SBWAndMTag ~\SBUnknownTag}%
+    \else
+      {\WandMFont\SBWAndMTag ~#2}%
+    \fi
+  \if#1Y\end{center}\fi
+}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\sbSetsbBaselineSkipAmt}
+%   |\sbSetsbBaselineSkipAmt| sets the |\sbBaselineSkipAmt| length.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+% This command is only used internally within the songbook style.  It 
+% is invoked just prior to any use of the sbBaselineSkipAmt length and
+% it calculated the proper value based upon all the fonts chosen at that
+% particular moment in time.  It does this by creating an |\hbox{}| that
+% contains one letter with a chord overtop of it; the height and depth 
+% of that |\hbox{}| added together then become the baseline skip.
+%
+%    \begin{macrocode}
+\newcommand{\sbSetsbBaselineSkipAmt}{
+  \ifChordBk%
+    \setbox0=\hbox{\strut\raise\SBChordRaise\hbox{\ChFont\sbChord{}A\relax\strut}A}%
+    \setlength{\sbBaselineSkipAmt}{\ht0 + \dp0}%
+  \else%
+    \setlength{\sbBaselineSkipAmt}{\baselineskip}%
+  \fi%
+}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsubsection{Primary Songbook Macros}
+% The macros in this section comprise those most often used by
+% \Songbook{} users.
+%
+%    \begin{macrocode}
+%%=======================================================%
+%%    P R I M A R Y   S O N G B O O K   M A C R O S      %
+%%=======================================================%
+
+%    \end{macrocode}
+%
+% \begin{macro}{\STitle}
+%   |\STitle|\parm{1}\parm{2}\parm{3} is the song title macro.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Centre this line Y/N? (optional)
+%     \item[\meta{2}] Song's title.
+%     \item[\meta{3}] Song's Key.
+%   \end{ParameterList}
+%
+%   Before printing the title we reset the |\SBVerseCnt| and |\SBSectionCnt|
+%   counters back to zero.  This is for songs which are printed in more
+%   than one key, because the verse count always begins at~``\texttt{1.}''
+%   for each key.
+%
+%   The first parameter to this macro is optional and is used to surpress
+%   the centering of the title (i.e., if the parameter is specified, and 
+%   that value is \emph{not}~`\texttt{Y}' then the center environment will not be created
+%   around the title.
+%
+%   This macro also makes an entry in the key index file; except in the case
+%   where a song is not being included, in which case no entry is made.
+%
+%   \changes{v4.1}{2003/08/31}{Added code to not write entries for excluded songs.}
+%%%
+%    \begin{macrocode}
+\newcommand{\STitle}[3][Y]{%
+  \setcounter{SBVerseCnt}{0}%
+  \setcounter{SBSectionCnt}{0}%
+  \ifExcludeSong\relax%
+    \else\keyIndex{{\protect\sbChord#3\protect\relax} -- #2}{\theSBSongCnt}\fi%
+  \vspace{\SpaceAboveSTitle}%
+  \if#1Y\begin{center}\fi
+    {\STitleNumberFont\theSBSongCnt}{\STitleFont\ --- #2}%
+    \ifWordsOnly\relax\else{\STitleKeyFont\ [{\sbChord#3\relax}]}\fi%
+  \if#1Y\end{center}\fi
+  \STitleMarkboth{#2}{\relax}%
+  }
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \changes{v4.1}{2003/08/31}{Added $[$\meta{Include?}$]$ option code.}
+% \begin{macro}{song}
+%   |song|\parm{1}\ldots\parm{7} is the environment within which a song
+%   is entered.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Include song in book? (optional)
+%     \item[\meta{2}] Title of song.
+%     \item[\meta{3}] Key song is written in.
+%     \item[\meta{4}] Copyright information.
+%     \item[\meta{5}] Name(s) of composer and lyricist.
+%     \item[\meta{6}] Scripture reference for the song.
+%     \item[\meta{7}] Copyright licensing information.
+%   \end{ParameterList}
+%
+%   The song environment encapsulates a song, including multiple
+%   appearances for multiple keys and translations.  We increment
+%   the song counter and then cause the title and other parameter
+%   information to be displayed.
+%
+%   \paragraph{Include Song In Book? (optional)}
+%   The first parameter is optional and its default value is
+%   ``\texttt{Y}''.  For simplicity this description refers to the field
+%   as \meta{Include?}.  When the value of \meta{Include?} is ``\texttt{Y}'' then all
+%   processing is done normally.  If the value of \meta{Include?} is (not ``\texttt{Y}'')
+%   then:
+%   \begin{itemize}
+%     \item the songcounter is incremented;
+%     \item a TOC index entry is written
+%      to a skipped-entry files, with each entry bracketted by some extra
+%      code (compared to the non-skipped-entry files);
+%     \item consider making \meta{Include?} look for several values to allow
+%      exclusions/inclusions to only happen for certain types of
+%      songbooks.
+%   \end{itemize}
+%   
+%   The skipped-entry TOC file is named \texttt{*.tocS}.  The purpose of creating
+%   a separate file is twofold: (1)~to allow normal songbook
+%   processing to simply omit these not-included files; (2)~to allow the
+%   skipped entries to be easily added back into the TOC processing
+%   process through simple appending of the files to the standard TOC
+%   file.
+%
+%    \begin{macrocode}
+\newenvironment{song}[7][Y]{                    % Comment markers to negate
+  \if#1Y\ExcludeSongfalse\else\ExcludeSongtrue\fi% the newline.
+  \ifPrintAllSongs\ExcludeSongfalse\fi		%
+  \SongMarkboth{\relax}{\relax}                 % 
+  \SBinSongEnvtrue                              %
+  \renewcommand{\SBinSongEnv}{\True}            %
+  \ifWordsOnly                                  %
+    \setlength{\parindent}{0pt}                 %
+  \fi                                           %
+%    \end{macrocode}
+%
+%   Store each of the parameters in a macro to make them easily accessible
+%   later.  This isn't as useful as it should be due to my inability to 
+%   properly detect in the title block macros whether or not the parameter
+%   is nil or blank when one of these |\the| macros is passed instead of
+%   the native parameter itself.
+%
+%   We \emph{clear} the translation macros now, since the |xlatn| environment
+%   is only valid inside a |song| environment, and we are now declaring a new
+%   |song|.
+%
+%    \begin{macrocode}
+  \renewcommand{\theSongComposer}{#5}           %
+  \renewcommand{\theSongCopyRt}{#4}             %
+  \renewcommand{\theSongKey}{#3}                %
+  \renewcommand{\theSongLicense}{#7}            %
+  \renewcommand{\theSongScriptRef}{#6}          %
+  \renewcommand{\theSongTitle}{#2}              %
+  \renewcommand{\theXlatnBy}{}                  %
+  \renewcommand{\theXlatnPerm}{}                %
+  \renewcommand{\theXlatnTitle}{}               %
+  %
+  \addtocounter{SBSongCnt}{1}                   %
+  %
+%    \end{macrocode}
+%
+%   \changes{v4.1}{2003/08/31}{Changes index invocation to match
+%			\meta{Include?} directive.}
+%
+%   Write table of contents and index entries in reponse to the user's
+%   \meta{Include?} directive.
+%
+%    \begin{macrocode}
+  \ifExcludeSong				%
+    \titleContentsSkip{\theSongTitle}{\theSongKey}%
+  \else						%
+    \titleIndex{\theSongTitle}{\theSBSongCnt}   %
+    \titleContents{\theSongTitle}{\theSongKey}  %
+  \fi						%
+%    \end{macrocode}
+%
+%   \changes{v4.1}{2003/08/31}{Implemented \meta{Include?} parameter through use
+%			of \TeX's |box2|.}
+%
+%   Now we deal with the user's \meta{Include?} directive.  If \meta{Include?} is
+%   ``\texttt{Y}'' then we will cause normal songbook processing to occur;
+%   otherwise we'll simply insert a |\relax| macro.  I have implemented this
+%   feature using a memory hungry method: when excluding a song, put the
+%   lyrics into |box2| and then discard it without using it.  Although Mark
+%   Wooding suggested using this method, he also provided a pointer to 
+%   a more robust method: using the |sverb| package that is part of 'mdwtools'
+%   collection (specifically, the |\ignoreenv{}| command).
+%
+%    \begin{macrocode}
+  \ifExcludeSong\setbox2=\vbox\bgroup\fi%
+%    \end{macrocode}
+%
+%   Try to keep the song title and all its contents on the same page;
+%   if that is what is desired.
+%
+%    \begin{macrocode}
+  \ifSamepageMode%
+    \begin{samepage}%
+  \fi%
+%    \end{macrocode}
+%
+%   Whereever you see a parameter used directly, and not the parameter macro
+%   just set, above, it is because I haven't figured out how the receiving
+%   macro can deal with accepting its input via a macro (and not via the
+%   native parameter).  In general this is because the receiving macro is
+%   attempting to detect and empty or blank parameter.
+%
+%   The second parameter is used directly here when |\STitle| is invoked
+%   (instead of |\theSongKey|), because I can't figure out how to cause the
+%   sharp and flat substitution to occur within the context of the
+%   |\renewcommand| statement, above.
+%
+%    \begin{macrocode}
+  \begin{center}
+    \STitle[N]{\theSongTitle}{#3}\\
+    \vspace{-.5ex}
+    \CpyRt[N]{#4}{#7}\\
+    \vspace{-.5ex}
+    \WAndM[N]{#5}\\
+    \if\given{#6}%
+      \vspace{-.75ex}
+      \ScriptRef[N]{\theSongScriptRef}\\
+    \fi%
+  \end{center}%
+  \vspace{\SpaceAfterTitleBlk}
+%    \end{macrocode}
+%
+%   If we're in |compactsong| mode then put us into |multicols{2}| mode.
+%
+%    \begin{macrocode}
+  \ifCompactSongMode
+    \begin{multicols*}{2}
+      \raggedcolumns
+  \fi
+  \SBDefaultFont%
+  }%
+%    \end{macrocode}
+%
+%   This brings the |song| environment's open clause to a close.
+%
+%   The close clause now starts.  We begin by closing out the |SamepageMode|
+%   and |CompactSongMode| environments, as applicable.
+%
+%    \begin{macrocode}
+{\ifSamepageMode%
+    \end{samepage}%
+  \fi%
+  \ifCompactSongMode
+    \end{multicols*}
+  \fi
+  \ifSongEject%
+    \vfill\pagebreak%
+  \else%
+    \SpaceAfterSong\pagebreak[1]%
+  \fi%
+%    \end{macrocode}
+%
+%   Here's where we close out the \meta{Include?} if-then-else.  Note that we
+%   immediately clear |box2| before proceding (an attempt to free up the
+%   memory we've just consumed).
+%
+%    \begin{macrocode}
+  \ifExcludeSong\egroup\setbox2=\hbox{}\fi%
+  \renewcommand{\SBinSongEnv}{\False}%
+  \SBinSongEnvfalse%
+  }
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\CBExcl}
+% \begin{macro}{\OHExcl}
+% \begin{macro}{\WBExcl}
+% \begin{macro}{\WOExcl}
+%   The |\CBExcl|, |\OHExcl|, |\WBExcl|, and |\WOExcl| macros exist to be
+%   passed as parameters to the |song| environment's \meta{Include?} 
+%   parameter.  The parameters cause the song to be excluded when processing the
+%   particular \Songbook{} type:
+%   \begin{description}
+%      \item[|CBExcl|\ ] Exclude the song when in |chordk| mode
+%      \item[|OHExcl|\ ] Exclude the song when in |overhead| mode
+%      \item[|WBExcl|\ ] Exclude the song when in |wordbk| mode
+%      \item[|WOExcl|\ ] Exclude the song when in either |wordbk| or
+%	 |overhead| mode
+%   \end{description}
+%
+%   Here's an example usage which shows a song to be excluded when in
+%   |chordbk| mode:
+%   \begin{verbatim}
+%     \documentclass{book}
+%     \usepackage[chordbk]{songbook}
+% 
+%     \begin{document}
+%       \begin{song}[\CBExcl]{title}{}{}{}{}{}
+%         some lyrics
+%       \end{song}
+%     \end{document}
+%   \end{verbatim}
+%
+%    \begin{macrocode}
+\newcommand{\CBExcl}{\ifChordBk N\else Y\fi}
+\newcommand{\OHExcl}{\ifOverhead N\else Y\fi}
+\newcommand{\WBExcl}{\ifWordBk N\else Y\fi}
+\newcommand{\WOExcl}{\ifWordsOnly N\else Y\fi}
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%
+% \begin{macro}{xlatn}
+%   |xlatn|\parm{1}\parm{2}\parm{3} is the song-translation environment.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Title of the translated song.
+%     \item[\meta{2}] Translation permission.
+%     \item[\meta{3}] Who performed the translation.
+%   \end{ParameterList}
+%
+%   The xlatn environment always occurs within a song environment.
+%   We reset the verse counter then cause the title and other
+%   parameter information to be displayed.
+%
+%    \begin{macrocode}
+\newenvironment{xlatn}[3]{% Comment marker negates the newline.
+        \renewcommand{\theXlatnBy}{#3}%
+        \renewcommand{\theXlatnPerm}{#2}%
+        \renewcommand{\theXlatnTitle}{#1}%
+        %
+        \titleIndex{\theXlatnTitle}{\theSBSongCnt}%
+        \titleContents{\theXlatnTitle}{\theSongKey}%
+        %
+        \begin{center}
+          \STitle[N]{\theXlatnTitle}{\theSongKey}\\
+          \CpyRt[N]{\theSongCopyRt}{\theSongLicense}\\
+          \if\nil{#2}%
+            \relax%
+          \else%
+            \vspace{-.5ex}
+            {\CpyRtFont\theXlatnPerm}\\
+          \fi
+          \if\nil{#3}%
+            \relax%
+          \else%
+            \vspace{-.5ex}
+            {\CpyRtFont\theXlatnBy}\\
+          \fi
+        \end{center}%
+        %
+        \setcounter{SBVerseCnt}{0}%
+        \setcounter{SBSectionCnt}{0}%
+}{\relax}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\sbChord}
+%   |\sbChord| changes a sequence of characters into a chord.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Chord.
+%   \end{ParameterList}
+%
+%   The original version of this function was written by Philip
+%   Hirschhorn $<$\texttt{psh@math.mit.edu}$>$ or 
+%   $<$\texttt{phirschhorn@lucy.wellesley.edu}$>$.
+%
+%   Scan the sequence of characters in Chord.  Replace `\texttt{\#}' characters
+%   with $\sharp$'s and `\texttt{b}' characters with $\flat$.  This produces more
+%   realistic looking chord symbols (which also take up less space than
+%   their phoney counterparts).  We also look for `\texttt{/}' characters, and
+%   insert a |\ChBassFont| command into the stream when a `\texttt{/}' is found.
+%   This makes the bass note of the chord to appear in a smaller font.
+%
+%    \begin{macrocode}
+\def\sbChord#1{%
+  \ifx#1\relax%
+    \let\next=\relax%
+  \else%
+    \ifx#1##% double sharp because we're inside a \def
+      $\sharp$%
+    \else%
+      \ifx#1b%
+        $\flat$%
+      \else%
+        \ifx#1/%
+          \ChBassFont /%
+        \else%
+          \ifx#1[%
+            \bgroup\ChBkFont [\egroup%
+          \else%
+            \ifx#1]%
+              \bgroup\ChBkFont ]\egroup%
+            \else%
+              #1%
+            \fi%
+          \fi%
+        \fi%
+      \fi%
+    \fi%
+    \let\next=\sbChord%
+  \fi%
+  \next%
+}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\Ch}
+% \begin{macro}{\ChX}
+% \begin{macro}{\Chr}
+%   |\Ch|\parm{1}\parm{2} is the chord over lyrics macro.\\
+%   |\ChX| is the Chord over lyrics macro, but deleting trailing spaces.\\
+%   |\Chr| is the Chord over lyrics macro, but inserting a rule, when necessary.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Chord.
+%     \item[\meta{2}] Syllable that chord is to be left justified over.
+%   \end{ParameterList}
+%
+%   The words-only style file turns off the chord generation and just
+%   prints the second parameter.
+%
+%   The |\ChX| version of this macro is used for the benefit of the words-only
+%   style to ensure that spaces following the macro are removed.  For
+%   example, an interword space containing a couple of extra chords would
+%   be written as (this is not usually necessary, but sometimes there is no
+%   other way to elliminate spurious white space from a words-only songbook):
+%   \begin{verbatim}
+%               \ChX{D7}{ing} \ChX{E}{} \ChX{D}{} \Ch{A}{You}
+%   \end{verbatim}
+%
+%   The |\Chr| version of this macro inserts a rule, at the height specified
+%   by the |\SBRuleRaiseAmount| macro, when the chord is wider than the
+%   syllable.  The default value creates an extended em-dash-like rule; a
+%   value of 0pt creates an underbar-like rule.  More details about the
+%   |\Chr| command follow below, just preceeding its definition.
+%
+%   This code is based on macros from Olivier Biot's
+%   (\texttt{http://www.biot.yucom.be/}) \texttt{chord.sty} file.  Changes made by me:
+%   \begin{itemize}
+%     \item removed annoying space between |\SBIntersyllableRules| when they butt
+%      up against one another
+%     \item changed the default |\ChordRaise| value to something closer to what my
+%      previous version of the |\Ch| command used to set
+%     \item renamed the commands: |\@| to |\Ch|, and |\@@| to |\Chr|
+%     \item renamed the variables used to adjust |\Ch|'s behaviour, to ensure no
+%      conflict exists with Olivier's macro.
+%   \end{itemize}
+%%%
+%    \begin{macrocode}
+\newcommand{\Ch}[2]{{%
+  \ifChordBk%
+    \setbox1=\hbox{\ChFont\sbChord#1\relax\strut}%
+    \setbox0=\hbox{#2}%
+    \ifdim\wd1<\wd0%
+      \strut\raise\SBChordRaise\copy1\kern-\wd1\copy0%
+    \else%
+      \strut\copy0\kern-\wd0\strut\raise\SBChordRaise\copy1%
+    \fi%
+  \else%
+    #2%
+  \fi}}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% The |\ChX| code.
+%
+%    \begin{macrocode}
+\newcommand{\ChX}[2]{%
+  \ifWordsOnly%
+    \if\nil{#2}%
+      \ignorespaces%
+    \else%
+      #2%
+    \fi%
+  \else%
+    \Ch{#1}{#2}%
+  \fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+%   The |\Chr| code and a detailed macro description \& definition.
+%
+%   We start with some internal scratch variables.  Any value they
+%   have prior to |\Chr|'s execution will be discarded each time.
+%
+%    \begin{macrocode}
+\newlength{\chCriticDim}
+\newlength{\chSpaceDim}
+%    \end{macrocode}
+%
+%   \begin{verbatim}
+%    DEF\Chr#1#2
+%    BEGIN
+%      \box1 == \hbox{... #1 --> Chord ...}
+%      \box0 == \hbox{... #2 --> Syllable ...}
+%      \chCriticDim == \wd0 - \chSpaceTolerance - 2 \chMiniSpace
+%      IFF \wd1 > \chCriticDim
+%        \chCriticDim == \wd1 - \wd0 - \chSpaceTolerance - 2 \chMiniSpace
+%        IFF \chCriticDim > 0mm
+%          \chSpaceDim == \wd1 - \wd0 + \chSpaceTolerance
+%        ELSE
+%          \chSpaceDim == \chSpaceTolerance
+%        FFI
+%        \chCriticDim == \chSpaceDim - 2 \chSpaceTolerance
+%        \raise \SBChordRaise \copy1 \kern - \wd1
+%        IFF \wd0 == 0mm
+%          \kern - 2 \chMiniSpace
+%        FFI
+%        \copy0
+%        \hbox to \chCriticDim{\hss\raise\SBRuleRaiseAmount
+%                            \hbox to \chSpaceDim{\SBIntersyllableRule}\hss}
+%      ELSE
+%        \raise \SBChordRaise \copy1 \kern - \wd1 \copy0
+%      FFI
+%    END
+%   \end{verbatim}
+%
+%    \begin{macrocode}
+\newcommand{\Chr}[2]{{%
+  \ifChordBk
+    \setbox1=\hbox{\ChFont\sbChord#1\relax\strut}%
+    \setbox0=\hbox{#2}%
+    \setlength{\chCriticDim}{\wd0 - \chSpaceTolerance}%
+    \advance\chCriticDim by 2\chMiniSpace%
+    \ifdim\wd1>\chCriticDim%
+      \chCriticDim \wd1%
+      \advance\chCriticDim by -\wd0%
+      \advance\chCriticDim by -\chSpaceTolerance%
+      \advance\chCriticDim by -2\chMiniSpace%
+      \ifdim\chCriticDim>0mm%
+        \chSpaceDim \wd1%
+        \advance\chSpaceDim by -\wd0%
+        \advance\chSpaceDim by \chSpaceTolerance%
+      \else%
+        \chSpaceDim\chSpaceTolerance%
+      \fi%
+      \chCriticDim \chSpaceDim%
+      \advance\chCriticDim by 2\chMiniSpace%
+      \strut\raise\SBChordRaise\copy1\kern-\wd1\ifdim\wd0=0mm\kern-2\chMiniSpace\fi%
+      \copy0\hbox to\chCriticDim{\hss%
+        \raise\SBRuleRaiseAmount\hbox to\chSpaceDim{\SBIntersyllableRule}\hss}%
+    \else%
+      \strut\raise\SBChordRaise\copy1\kern-\wd1%
+      \copy0%
+    \fi%
+  \else%
+    #2%
+  \fi}%
+}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\SBMargNote}
+%   |\SBMargNote|\parm{1} creates a \Songbook{} marginal note.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Text of note to place in margin.
+%   \end{ParameterList}
+%
+% Used to place a note of some kind in the margin of a songbook, or within
+% a footnote when in |CompactSong| mode.  In words-only mode this macro is a 
+% no-op.
+%
+%   If we are excluding a song then we have |\SBMargNote| take no action.  
+%   We do this to be sure that no footnotes are generated, and to prevent 
+%   the error that will occur from attempting to use the |\marginpar| command
+%   within a |\vbox{}|.
+%   \changes{v4.1a}{2003/09/22}{Added an \textsf{ifExcludeSong} clause to avoid the 
+%			conflict with \textsf{marginpar}}
+%
+%    \begin{macrocode}
+\newcommand{\SBMargNote}[1]{%
+  \ifExcludeSong%
+    \relax%
+  \else\ifWordsOnly%
+    \relax%
+  \else\ifCompactSongMode%
+    \footnote{{\SBMargNoteFont{#1}}}%
+  \else%
+    \marginpar{{\begin{flushleft}\SBRefFont{#1}\end{flushleft}}}%
+  \fi\fi\fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\SBRef}
+%   |\SBRef| creates a song reference in the margin.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Songbook/CD/tape name.
+%     \item[\meta{2}] Page/Song number within book referenced by \meta{1},
+%                       or tape/CD publisher info.
+%   \end{ParameterList}
+%
+%   Used to indicate a source for the full SATB music for this song, or 
+%   what CD/cassette the song can be found on.  In words-only mode this 
+%   macro is a no-op.  This normally appears in the margin of the songbook,
+%   but in |CompactSong| mode the information appears in a footnote that is
+%   always numbered `\texttt{0}' (even if there is more than one reference in a 
+%   song.
+%
+%   If we are excluding a song then we have |\SBRef| take no action.  We do
+%   this to be sure that no footnotes are generated, and to prevent the
+%   error that will occur from attempting to use the |\marginpar| command
+%   within a |\vbox{}|.
+%   \changes{v4.1a}{2003/09/22}{Added an \textsf{ifExcludeSong} clause to avoid the 
+%			conflict with \textsf{marginpar}}
+%
+%    \begin{macrocode}
+\newcommand{\SBRef}[2]{%
+  \ifExcludeSong%
+    \relax%
+  \else\ifWordsOnly%
+    \relax%
+  \else\ifCompactSongMode%
+    \footnotetext[0]{{\SBRefFont{\em #1}, {#2}.}}%
+  \else%
+    \marginpar{{\begin{flushleft}\SBRefFont{\em #1}, {#2}.\end{flushleft}}}%
+  \fi\fi\fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{SBVerse}
+% \begin{macro}{SBVerse*}
+%   The |SBVerse| and |SBVerse*| environments encapsulate a verse.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%   Very much like \LaTeX{}'s verse environment, except that here the
+%   verses are numbered.  The indent amount for lines that are too long
+%   is set with the |\HangAmt| command (see the constant definitions at
+%   the top of this document).
+%
+%   A version of this command which indents but down not place an
+%   |\SBVerseCnt| before the chorus is available as |SBVerse*|.
+%   Similar to \LaTeX{}'s |\section*| command, the verse counter is not
+%   incremented either.
+%
+%    \begin{macrocode}
+\newenvironment{SBVerse}{%
+  \sbSetsbBaselineSkipAmt%
+  \bgroup%
+  \addtocounter{SBVerseCnt}{1}%
+  \SBVerseMarkright{\theSBVerseCnt}%
+  \begin{list}{{\SBVerseNumberFont\theSBVerseCnt .}}
+    {\setlength {\leftmargin}   {\LeftMarginSBVerse + \HangAmt}
+      \setlength{\itemindent}   {-\HangAmt}
+      \setlength{\listparindent}{-\HangAmt}
+      \setlength{\parsep}       {0pt}
+      \setlength{\baselineskip} {\sbBaselineSkipAmt}
+    }%
+    \item}
+{\end{list}%
+ \egroup%
+ \SpaceAfterVerse}
+
+%    \end{macrocode}
+% \end{macro}
+%
+%   The |SBVerse*| code.  Coding of this environment courtesy of Herbert
+%   Martin Dietze $<$\texttt{herbert@fh-wedel.de}$>$.
+%
+%    \begin{macrocode}
+\newenvironment{SBVerse*}{%
+  \sbSetsbBaselineSkipAmt%
+  \bgroup%
+  \begin{list}{{\SBVerseNumberFont }}
+    {\setlength {\leftmargin}   {\LeftMarginSBVerse + \HangAmt}
+      \setlength{\itemindent}   {-\HangAmt}
+      \setlength{\listparindent}{-\HangAmt}
+      \setlength{\parsep}       {0pt}
+      \setlength{\baselineskip} {\sbBaselineSkipAmt}
+      }%
+    \item}
+{\end{list}%
+ \egroup%
+ \SpaceAfterVerse}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{SBSection}
+% \begin{macro}{SBSection*}
+%   The |SBSection| and |SBSection*| environments encapsulate a section.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%   Very much like \LaTeX's verse environment, except that here the
+%   sections are numbered.  The indent amount for lines that are too long
+%   is set with the |\HangAmt| command (see the constant definitions at
+%   the top of this file).
+%
+%   A version of this command which indents but doesn't place an
+%   |\SBSectionCnt| before the chorus is available as |SBSection*|.
+%   Similar to \LaTeX's |\section*| command, the section counter is not
+%   incremented either.
+%
+%    \begin{macrocode}
+\newenvironment{SBSection}{%
+  \sbSetsbBaselineSkipAmt%
+  \bgroup%
+  \addtocounter{SBSectionCnt}{1}%
+  \SBSectionMarkright{SBSectionCnt}
+  \begin{list}{{\SBSectionNumberFont\alph{SBSectionCnt})}}
+    {\setlength {\leftmargin}   {\LeftMarginSBSection + \HangAmt}
+      \setlength{\itemindent}   {-\HangAmt}
+      \setlength{\listparindent}{-\HangAmt}
+      \setlength{\parsep}       {0pt}
+      \setlength{\baselineskip} {\sbBaselineSkipAmt}
+      }%
+    \item}
+{\end{list}%
+ \egroup%
+ \SpaceAfterSection}
+
+%    \end{macrocode}
+% \end{macro}
+%
+%   The |SBSection*| code.  Coding of this environment courtesy of Herbert
+%   Martin Dietze $<$\texttt{herbert@fh-wedel.de}$>$.
+%
+%    \begin{macrocode}
+\newenvironment{SBSection*}{%
+  \sbSetsbBaselineSkipAmt%
+  \bgroup%
+  \begin{list}{{\SBSectionNumberFont }}
+    {\setlength {\leftmargin}   {\LeftMarginSBSection + \HangAmt}
+      \setlength{\itemindent}   {-\HangAmt}
+      \setlength{\listparindent}{-\HangAmt}
+      \setlength{\parsep}       {0pt}
+      \setlength{\baselineskip} {\sbBaselineSkipAmt}
+      }%
+    \item}
+{\end{list}%
+ \egroup%
+ \SpaceAfterSection}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\SBChorus}
+% \begin{macro}{\SBChorus*}
+%   The |SBChorus| and |SBChorus*| environments encapsulate a chorus.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%   Very much like \LaTeX{}'s verse environment, except that here a
+%   |\SBChorusTag| tag is inserted to demark the start of the chorus.
+%   The indent amount for lines that are too long is set with the
+%   |\HangAmt| command (see the constant definitions at the top of
+%   this file).
+%
+%   A version of this command which indents but does not place a
+%   |\SBChorusTag| before the chorus is available as |SBChorus*|.
+%
+%    \begin{macrocode}
+\newenvironment{SBChorus}{%
+  \sbSetsbBaselineSkipAmt%
+  \bgroup%
+  \SBChorusMarkright{\SBChorusTag}
+  \begin{list}{{\SBChorusTagFont\SBChorusTag}}
+    {\setlength {\leftmargin}   {\LeftMarginSBChorus + \HangAmt}
+      \setlength{\itemindent}   {-\HangAmt}
+      \setlength{\listparindent}{-\HangAmt}
+      \setlength{\parsep}       {0pt}
+      \setlength{\baselineskip} {\sbBaselineSkipAmt}
+      }%
+    \item}
+{\end{list}%
+ \egroup%
+ \SpaceAfterChorus%
+}
+
+%    \end{macrocode}
+% \end{macro}
+%
+%   The |SBChorus*| code.  Coding of this environment courtesy of Herbert
+%   Martin Dietze $<$\texttt{herbert@fh-wedel.de}$>$.
+%
+%    \begin{macrocode}
+\newenvironment{SBChorus*}{%
+  \sbSetsbBaselineSkipAmt%
+  \bgroup%
+  \begin{list}{{\SBChorusTagFont }}
+    {\setlength {\leftmargin}   {\LeftMarginSBChorus + \HangAmt}
+      \setlength{\itemindent}   {-\HangAmt}
+      \setlength{\listparindent}{-\HangAmt}
+      \setlength{\parsep}       {0pt}
+      \setlength{\baselineskip} {\sbBaselineSkipAmt}
+      }%
+    \item}
+{\end{list}%
+ \egroup%
+ \SpaceAfterChorus}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\SBOpGroup}
+%   |\SBOpGroup| identifies an open chorus/verse.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%   This environment is akin to SBChorus, except that no tag and no
+%   indentation is performed.  This environment serves two purposes:
+%   \begin{enumerate}
+%     \item Identify a verse or chorus that is unmarked (by way of a tag)
+%      and the left margin of the block is not indented.
+%     \item Puts the verse or chorus in a list environment so that wrapping
+%      lines are properly indented.
+%   \end{enumerate}
+%%%
+%    \begin{macrocode}
+\newenvironment{SBOpGroup}{%
+  \sbSetsbBaselineSkipAmt%
+  \bgroup%
+  \begin{list}{\hbox{}}
+    {\setlength {\leftmargin}   {\HangAmt}
+      \setlength{\itemindent}   {-\HangAmt}
+      \setlength{\listparindent}{-\HangAmt}
+      \setlength{\topsep}       {0pt}
+      \setlength{\parsep}       {0pt}
+      \setlength{\labelwidth}   {0pt}
+      \setlength{\labelsep}     {0pt}
+      \setlength{\baselineskip} {\sbBaselineSkipAmt}
+      }%
+    \item}
+{\end{list}%
+ \egroup%
+ \SpaceAfterOpGroup}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\SBBridge}
+%   |\SBBridge|\parm{1} identifies a bridge.
+%   \begin{ParameterList}
+%     \item[\meta{1}] The Bridge.
+%   \end{ParameterList}
+%
+%   This command is used to encapsulate a bridge that occurs in a song.  In
+%   words-only mode this command is a no-op.
+%
+%    \begin{macrocode}
+\newcommand{\SBBridge}[1]{%
+  \ifWordsOnly%
+    \relax%
+  \else%
+    \sbSetsbBaselineSkipAmt%
+    \bgroup%
+    \begin{list}{{\SBBridgeTagFont\SBBridgeTag}}
+      {\setlength {\leftmargin}  {\LeftMarginSBChorus}%
+        \setlength{\parsep}      {0pt}
+        \setlength{\baselineskip}{\sbBaselineSkipAmt}
+        }%
+      \item #1
+    \end{list}%
+    \egroup\par
+  \fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\SBEnd}
+%   |\SBEnd|\parm{1}\parm{2} identifies a song ending.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Display in words-only? (optional)
+%     \item[\meta{2}] The Ending.
+%   \end{ParameterList}
+%
+%   This command is used to encapsulate the ending of a song.  If
+%   the first parameter is not specified, or if it is~`\texttt{N}',
+%   then in words-only mode this command is a no-op.
+%
+%    \begin{macrocode}
+\newcommand{\SBEnd}[2][N]{%
+  \ifthenelse{\equal{\ifWordsOnly Y\fi}{Y}
+    \and \equal{N}{#1}}%
+  {\relax}%
+  {\sbSetsbBaselineSkipAmt%
+   \bgroup%
+    \begin{list}{{\SBEndTagFont\SBEndTag}}
+      {\setlength {\leftmargin}  {\LeftMarginSBChorus}
+        \setlength{\parsep}      {0pt}
+        \setlength{\baselineskip}{\sbBaselineSkipAmt}
+        }%
+    \item #2
+    \end{list}%
+    \egroup\par}
+  }
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\SBIntro}
+%   |\SBIntro|\parm{1}\parm{2} identifiesd an introduction.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Display in words-only? (optional)
+%     \item[\meta{2}] The Introduction.
+%   \end{ParameterList}
+%
+%   This command is used to encapsulate an introduction to a song.  If
+%   the first parameter is not specified, or if it is~`\texttt{N}', then in 
+%   words-only mode this command is a no-op.
+%
+%    \begin{macrocode}
+\newcommand{\SBIntro}[2][N]{%
+  \ifthenelse{\equal{\ifWordsOnly Y\fi}{Y}
+    \and \equal{N}{#1}}%
+  {\relax}%
+  {\sbSetsbBaselineSkipAmt%
+   \bgroup%
+    \begin{list}{{\SBIntroTagFont\SBIntroTag}}%
+      {\setlength {\leftmargin}  {\LeftMarginSBChorus}%
+        \setlength{\parsep}      {0pt}
+        \setlength{\baselineskip}{\sbBaselineSkipAmt}
+        }%
+      \item #2
+      \vspace{-\topsep}%\vspace{-\partopsep}%
+    \end{list}%
+    \egroup\par}%
+  }
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{SBBracket}
+% \begin{macro}{SBBracket*}
+%   The |SBBracket|\parm{1} and |SBBracket|\parm{1} environments encapsulates
+%   a bracketed versicle.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Some tag is inserted before the bracket to indicate
+%                   the significance of the bracketed area.  
+%   \end{ParameterList}
+%
+%    There are two versions of this environment: |SBBracket| and |SBBracket*|.
+%    They operate identically, except that the *ed version doesn't print
+%    its tag and bracket in words-only modes.
+%
+%    This is a more versatile, and better formatted version of |SBBridge|, 
+%    |SBOccurs|, etc.; and it is recommended that this be used in the others 
+%    place.
+%
+%    Starting in version~4.0 of the style, the left-hand indentation of
+%    this environment has been chosen such that the |SBVerse|, |SBChorus|, and
+%    |SBBracket| song-words all align against the same left margin when printing
+%    standard words \&~chords songbooks.
+%
+%    \begin{macrocode}
+\newenvironment{SBBracket}[1]{%
+  \SpaceBeforeSBBracket
+  \sbSetsbBaselineSkipAmt%
+  \setbox0=\hbox to \LeftMarginSBBracket{\parbox{\LeftMarginSBBracket}%
+    {\flushright{\hspace{0pt}\SBBracketTagFont #1}}}%
+  \hbox\bgroup%
+    \rightskip=\LeftMarginSBBracket%
+    $\raisebox{1.25ex}{\copy0}%
+    \left\lbrack%
+      \vcenter\bgroup%
+        \begin{list}{\hbox{}}%                          %
+          {\setlength {\leftmargin}   {\HangAmt + 0.5em}% This list
+            \setlength{\rightmargin}  {\LeftMarginSBBracket}%
+            \setlength{\itemindent}   {-\HangAmt}%      % been copied
+            \setlength{\listparindent}{-\HangAmt}%      % verbatim from
+            \setlength{\topsep}       {0pt}%            % the SBOpGroup
+            \setlength{\parsep}       {0pt}%            % environment,
+            \setlength{\labelwidth}   {0pt}%            % above and then
+            \setlength{\labelsep}     {0pt}%            % modified slightly.
+            \setlength{\baselineskip} {\sbBaselineSkipAmt}%
+            }%                                          %
+          \item%
+}{%
+        \end{list}%
+      \egroup%
+    \right.$%
+    \rightskip=0pt
+  \egroup
+  \SpaceAfterSBBracket
+}
+
+%    \end{macrocode}
+% \end{macro}
+%
+%   The |SBBracket*| code.
+%
+%    \begin{macrocode}
+\newenvironment{SBBracket*}[1]{%
+  \SpaceBeforeSBBracket
+  \sbSetsbBaselineSkipAmt%
+  \ifNotWordsOnly
+    \setbox0=\hbox to \LeftMarginSBBracket{\parbox{\LeftMarginSBBracket}%
+      {\flushright{\hspace{0pt}\SBBracketTagFont #1}}}%
+    \hbox\bgroup%
+      \rightskip=\LeftMarginSBBracket%
+      $\raisebox{1.25ex}{\copy0}%
+      \left\lbrack%
+        \vcenter\bgroup%
+  \fi
+        \begin{list}{\hbox{}}%                          %
+          {\setlength {\leftmargin}   {\HangAmt + 0.5em}% This list
+            \setlength{\rightmargin}  {\LeftMarginSBBracket}%
+            \setlength{\itemindent}   {-\HangAmt}%      % been copied
+            \setlength{\listparindent}{-\HangAmt}%      % verbatim from
+            \setlength{\topsep}       {0pt}%            % the SBOpGroup
+            \setlength{\parsep}       {0pt}%            % environment,
+            \setlength{\labelwidth}   {0pt}%            % above and then
+            \setlength{\labelsep}     {0pt}%            % modified slightly.
+            \setlength{\baselineskip} {\sbBaselineSkipAmt}%
+            }%                                          %
+          \item%
+}{%
+        \end{list}%
+  \ifNotWordsOnly
+        \egroup%
+      \right.$%
+      \rightskip=0pt
+    \egroup
+  \fi
+  \SpaceAfterSBBracket
+}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{SBOccurs}
+%   The |SBOccurs|\parm{1} environment encapsulates an occurance.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Occurance number(s).  For example ``\texttt{1,3}'' would
+%                   designate that this passage applies to the 1$^{st}$ and
+%                   3$^{rd}$ occurances.
+%   \end{ParameterList}
+%
+%    \begin{macrocode}
+\newenvironment{SBOccurs}[1]{%
+  {\SBOccursTagFont #1\SBOccursBrktFont [}
+  }
+{{\SBOccursBrktFont ]}}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{SBExtraKeys}
+%   The |SBExtraKeys|\parm{1} environment encapsulates extra song keys.
+%   \begin{ParameterList}
+%     \item[\meta{1}] This parameter actually is used to either pass or
+%       not pass all the content of the environment on to
+%       the \LaTeX processor.
+%   \end{ParameterList}
+%
+%   Songs are frequently listed in more than one key.  This is ok for
+%   books with chords, however the words-only edition should only print
+%   one occurance of a song.  So, any extra keys are placed in a
+%   |SBExtraKey| environment.  This allows them to be \emph{shut off} when
+%   they're not needed.
+%
+%   This was coded some years ago and I probably wouldn't do it this way
+%   again; however, it works so I'm not inclined to \emph{better} it.
+%
+%    \begin{macrocode}
+\newenvironment{SBExtraKeys}[1]{%
+  \ifWordsOnly%
+    \relax%
+  \else%
+    #1
+  \fi}
+{}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\CBPageBrk}
+%   |\CBPageBrk|\parm{1} generates a page break here if we're in Chordbk mode.
+%   \begin{ParameterList}
+%     \item[\meta{1}] Take effect in CompactSong mode too? (optional)
+%   \end{ParameterList}
+%
+%   When we're also in CompactSong mode we will only execute the page
+%   break if a parameter other than~`\texttt{N}' has been passed.
+%
+%    \begin{macrocode}
+\newcommand{\CBPageBrk}[1][N]{%
+  \ifChordBk%
+    \ifCompactSongMode
+      \ifthenelse{\equal{#1}{N}}
+      {\relax}
+      {\vfill\pagebreak}
+    \else
+      \vfill\pagebreak
+    \fi
+  \fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\CSColBrk}
+%   |\CSColBrk| generates a column break here if we're in |compactsong|  mode.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%    \begin{macrocode}
+\newcommand{\CSColBrk}{%
+  \ifCompactSongMode%
+    \columnbreak%
+  \fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\NotWOPageBrk}
+%   |\NotWOPageBrk| generates a page break here if we're \emph{not} in words-only mode.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%    \begin{macrocode}
+\newcommand{\NotWOPageBrk}{%
+  \ifWordsOnly%
+    \relax%
+  \else%
+    \pagebreak
+  \fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\OHPageBrk}
+%   |\OHPageBrk| generates a page break here if we're in |overhead| mode.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%    \begin{macrocode}
+\newcommand{\OHPageBrk}{%
+  \ifOverhead%
+    \pagebreak
+  \fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\WBPageBrk}
+%   |\WBPageBrk| generates a page break here if we're in |workbk| mode.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%    \begin{macrocode}
+\newcommand{\WBPageBrk}{%
+  \ifWordBk%
+    \pagebreak
+  \fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\WOPageBrk}
+%   |\WOPageBrk| generates a page break here if we're in words-only mode.
+%   \begin{ParameterList}
+%     \item None.
+%   \end{ParameterList}
+%
+%    \begin{macrocode}
+\newcommand{\WOPageBrk}{%
+  \ifWordsOnly%
+    \pagebreak
+  \fi}
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsubsection{Obsolete Macros}
+% The macros in this section are no longer recommended, but will
+% continue to exist in the next version of the style.  Existing
+% users of this style should upgrade their source files to make
+% use of the new, replacement, mechanisms offered by the style.
+%
+%    \begin{macrocode}
+%%=======================================================%
+%%            O B S O L E T E   M A C R O S              %
+%%=======================================================%
+
+%    \end{macrocode}
+%
+% There are no obsolete macros in this release.
+%
+% \subsubsection{Deprecated Macros}
+%
+% The macros in this section will be deleted in the next version of
+% the style.  Where these old macros conflict with new ones they have
+% been renamed by placing a lowercase `o' at the start of each macro
+% name; this makes them easily accessible yet out of the way.
+%
+%    \begin{macrocode}
+%%=======================================================%
+%%          D E P R E C A T E D   M A C R O S            %
+%%=======================================================%
+
+%    \end{macrocode}
+%
+% \paragraph{Boolean Contants} In the early releases, before I \emph{knew}
+% about \LaTeX's |\newif| command I had coded |\if|s using these contants.
+% These should have been removed some time ago, but I had neglected placing
+% them into this \textit{Deprecated Macros} section and so hadn't given proper
+% notice.  Consider this \textit{notice}.
+% \begin{macro}{\False}
+% \begin{macro}{\True}
+% \begin{macro}{\ChordBk}
+% \begin{macro}{\Overhead}
+% \begin{macro}{\SongEject}
+% \begin{macro}{\WordBk}
+% \begin{macro}{\WordsOnly}
+% \begin{macro}{\SBinSongEnv}
+%   |\False| is defined for use in |\if| macro contructs and the other
+%                constants in this style.\\
+%   |\True| is defined for use in |\if| macro contructs and the other
+%                constants in this style.\\
+%   |\ChordBk| tells if we are processing a \texttt{chordbk.sty} document.\\
+%   |\Overhead| tells if we are processing an \texttt{overhead.sty} document.\\
+%   |\SongEject| specifies if we want to end the current page at the end of
+%               every |song| environment.  A value of |\True| means
+%               eject after every |song| environment.\\
+%   |\WordBk| tells if we are processing a \texttt{wordbk.sty} document\\
+%   |\WordsOnly| is equal to |\True| if we're in words-only mode.
+%               The default value will be |\False|, as that is how all of
+%               the commands in this file will act.\\
+%   |\SBinSongEnv| tells if we are inside of a song environment.  This is
+%               re-defined as we enter and exit the song environment.
+%%%
+%    \begin{macrocode}
+\newcommand{\False}{0}
+\newcommand{\True}{1}
+\newcommand{\ChordBk}{\False}
+\newcommand{\Overhead}{\False}
+\newcommand{\SongEject}{\True}
+\newcommand{\WordBk}{\False}
+\newcommand{\WordsOnly}{\False}
+\newcommand{\SBinSongEnv}{\False}
+
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%
+% End of songbook.sty file.
+%
+%    \begin{macrocode}
+\endinput
+
+%    \end{macrocode}
+%
+% \Finale
+% \PrintIndex \PrintChanges
+\endinput
+
+TODO:
+
+Make the index sorted in the order of the keys (i.e. Bb should come
+before B).  I have some ideas about this one, but they involve rather
+more work that I may have time for.
+
+Chord macro that places [] around optional chords.
+
+Allow chords to be centered over the sylables.  Re: request by "Tobias
+Weidelt" <tobias@weidelt.de>.
+
+% Local Variables:
+%   LaTeX-item-indent:      -1
+%   LaTeX-indent-level:     2
+%   TeX-brace-indent-level: 2
+%   TeX-auto-untabify:      nil 
+%   TeX-style-local:        "../style/"
+% End:
diff --git a/Master/texmf-dist/source/latex/songbook/songbook.ins b/Master/texmf-dist/source/latex/songbook/songbook.ins
new file mode 100644
index 00000000000..3663a991f58
--- /dev/null
+++ b/Master/texmf-dist/source/latex/songbook/songbook.ins
@@ -0,0 +1,75 @@
+%%	rcsid = @(#)$Id: songbook.ins,v 1.4 2003/08/19 23:30:37 christopher Exp $
+%%
+%%      songbook.ins - Docstrip batch file for Songbook Style 
+%%
+%%      Version 4.1, 31 August, 2003
+%%
+%%      Copyright 2002--2003 Christopher Rath <christopher@rath.ca>
+%%
+%%      This package is free software; you can redistribute it and/or
+%%      modify it under the terms of the GNU Lesser General Public
+%%      License as published by the Free Software Foundation; either
+%%      version 2.1 of the License, or (at your option) any later
+%%      version.
+%%
+%%      This package is distributed in the hope that it will be
+%%      useful, but WITHOUT ANY WARRANTY; without even the implied
+%%      warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+%%      PURPOSE.  See the GNU Lesser General Public License for more
+%%      details.
+%%
+%%	This file will generate fast loadable files and documentation
+%%	driver files from the doc files in this package when run
+%%	through LaTeX or TeX.
+%%
+%% --------------- start of docstrip commands ------------------
+%%
+\input docstrip
+
+\def\SimplePackage#1{%
+  \generate{\file{#1.sty}{\from{#1.dtx}{package}}}}
+
+\keepsilent
+
+%\usedir{tex/latex/tools}
+
+\preamble
+
+This is a generated file.
+
+Copyright 1992--2002 Christopher Rath <christopher@rath.ca>
+
+This package is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later
+version.
+
+This package is distributed in the hope that it will be
+useful, but WITHOUT ANY WARRANTY; without even the implied
+warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+PURPOSE.  See the GNU Lesser General Public License for more
+details.
+
+The list of all files belonging to the LaTeX Songbook Style is
+given in the file `relnotes.txt'.
+
+\endpreamble
+
+% Generate Files
+%%%%%%%%%%%%%%%%
+\SimplePackage{songbook}
+
+\Msg{***********************************************************}
+\Msg{*}
+\Msg{* To finish the installation you have to move the following}
+\Msg{* files into a directory searched by TeX:}
+\Msg{*}
+\Msg{* All the files with extension `.sty' and `.tex'}
+\Msg{*}
+\Msg{* To produce the documentation run the .dtx files through LaTeX.}
+\Msg{*}
+\Msg{* Happy TeXing}
+\Msg{***********************************************************}
+
+\endbatchfile