summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/source/latex/epigraph/epigraph.dtx
blob: baec16b14d04d49ba796ab8a2d7ae9e9d9b47243 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
% \iffalse meta-comment
% epigraph.dtx
% Author: Peter Wilson, Herries Press
% Maintainer: Will Robertson (will dot robertson at latex-project dot org)
% Copyright 1998--2004 Peter R. Wilson
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either
% version 1.3c of this license or (at your option) any 
% later version: <http://www.latex-project.org/lppl.txt>
%
% This work has the LPPL maintenance status "maintained".
% The Current Maintainer of this work is Will Robertson.
%
% This work consists of the files listed in the README file.
%
% 
%<*driver>
\documentclass{ltxdoc}
\EnableCrossrefs
\CodelineIndex
\setcounter{StandardModuleDepth}{1}
\begin{document}
  \DocInput{epigraph.dtx}
\end{document}
%</driver>
%
% \fi
%
% \CheckSum{242}
%
% \DoNotIndex{\',\.,\@M,\@@input,\@addtoreset,\@arabic,\@badmath}
% \DoNotIndex{\@centercr,\@cite}
% \DoNotIndex{\@dotsep,\@empty,\@float,\@gobble,\@gobbletwo,\@ignoretrue}
% \DoNotIndex{\@input,\@ixpt,\@m}
% \DoNotIndex{\@minus,\@mkboth,\@ne,\@nil,\@nomath,\@plus,\@set@topoint}
% \DoNotIndex{\@tempboxa,\@tempcnta,\@tempdima,\@tempdimb}
% \DoNotIndex{\@tempswafalse,\@tempswatrue,\@viipt,\@viiipt,\@vipt}
% \DoNotIndex{\@vpt,\@warning,\@xiipt,\@xipt,\@xivpt,\@xpt,\@xviipt}
% \DoNotIndex{\@xxpt,\@xxvpt,\\,\ ,\addpenalty,\addtolength,\addvspace}
% \DoNotIndex{\advance,\Alph,\alph}
% \DoNotIndex{\arabic,\ast,\begin,\begingroup,\bfseries,\bgroup,\box}
% \DoNotIndex{\bullet}
% \DoNotIndex{\cdot,\cite,\CodelineIndex,\cr,\day,\DeclareOption}
% \DoNotIndex{\def,\DisableCrossrefs,\divide,\DocInput,\documentclass}
% \DoNotIndex{\DoNotIndex,\egroup,\ifdim,\else,\fi,\em,\endtrivlist}
% \DoNotIndex{\EnableCrossrefs,\end,\end@dblfloat,\end@float,\endgroup}
% \DoNotIndex{\endlist,\everycr,\everypar,\ExecuteOptions,\expandafter}
% \DoNotIndex{\fbox}
% \DoNotIndex{\filedate,\filename,\fileversion,\fontsize,\framebox,\gdef}
% \DoNotIndex{\global,\halign,\hangindent,\hbox,\hfil,\hfill,\hrule}
% \DoNotIndex{\hsize,\hskip,\hspace,\hss,\if@tempswa,\ifcase,\or,\fi,\fi}
% \DoNotIndex{\ifhmode,\ifvmode,\ifnum,\iftrue,\ifx,\fi,\fi,\fi,\fi,\fi}
% \DoNotIndex{\input}
% \DoNotIndex{\jobname,\kern,\leavevmode,\let,\leftmark}
% \DoNotIndex{\list,\llap,\long,\m@ne,\m@th,\mark,\markboth,\markright}
% \DoNotIndex{\month,\newcommand,\newcounter,\newenvironment}
% \DoNotIndex{\NeedsTeXFormat,\newdimen}
% \DoNotIndex{\newlength,\newpage,\nobreak,\noindent,\null,\number}
% \DoNotIndex{\numberline,\OldMakeindex,\OnlyDescription,\p@}
% \DoNotIndex{\pagestyle,\par,\paragraph,\paragraphmark,\parfillskip}
% \DoNotIndex{\penalty,\PrintChanges,\PrintIndex,\ProcessOptions}
% \DoNotIndex{\protect,\ProvidesClass,\raggedbottom,\raggedright}
% \DoNotIndex{\refstepcounter,\relax,\renewcommand,\reset@font}
% \DoNotIndex{\rightmargin,\rightmark,\rightskip,\rlap,\rmfamily,\roman}
% \DoNotIndex{\roman,\secdef,\selectfont,\setbox,\setcounter,\setlength}
% \DoNotIndex{\settowidth,\sfcode,\skip,\sloppy,\slshape,\space}
% \DoNotIndex{\symbol,\the,\trivlist,\typeout,\tw@,\undefined,\uppercase}
% \DoNotIndex{\usecounter,\usefont,\usepackage,\vfil,\vfill,\viiipt}
% \DoNotIndex{\viipt,\vipt,\vskip,\vspace}
% \DoNotIndex{\wd,\xiipt,\year,\z@}
%
% \changes{v1.0}{1998/11/15}{First public release}
% \changes{v1.1}{1998/11/29}{Added epigraphs before chapter headings}
% \changes{v1.2}{1999/09/12}{Added cleartoevenpage and extended documentation}
% \changes{v1.2a}{1999/12/01}{Extended documentation for epigraphs on Part pages}
% \changes{v1.3}{1999/12/01}{Added \cs{dropchapter} and \cs{undodrop} commands}
% \changes{v1.4}{2000/01/16}{Added flushleftright environment}
% \changes{v1.5}{2000/02/20}{Generalised \cs{cleartoevenpage} command}
% \changes{v1.5a}{2002/10/22}{Fixed class with ccaption package}
% \changes{v1.5b}{2004/04/22}{Updated license and contact details}
% \changes{v1.5c}{2009/09/02}{New maintainer (Will Robertson)}
%
% \def\dtxfile{epigraph.dtx}
% \def\fileversion{v1.5}  \def\filedate{2000/02/20}
% \def\fileversion{v1.5a} \def\filedate{2002/10/22}
% \def\fileversion{v1.5b} \def\filedate{2004/04/22}
% \def\fileversion{v1.5c} \def\filedate{2009/09/02}
% \newcommand*{\Lpack}[1]{\textsf {#1}}           ^^A typeset a package
% \newcommand*{\Lopt}[1]{\textsf {#1}}            ^^A typeset an option
% \newcommand*{\file}[1]{\texttt {#1}}            ^^A typeset a file
% \newcommand*{\Lcount}[1]{\textsl {\small#1}}    ^^A typeset a counter
% \newcommand*{\pstyle}[1]{\textsl {#1}}          ^^A typeset a pagestyle
% \newcommand*{\Lenv}[1]{\texttt {#1}}            ^^A typeset an environment
%  ^^A fake a rhsepigraph for demo purposes
% \newcommand{\tepi}[2]{\vspace{.5\baselineskip}\begin{flushright}\small
%    \begin{minipage}{2.5in}
%    \begin{minipage}{2.5in}\begin{flushleft} #1\\
%       \rule[.5ex]{2.5in}{.4pt}
%    \end{flushleft}\end{minipage} \\
%    \begin{minipage}{2.5in}\begin{flushright} #2
%    \end{flushright}\end{minipage}
%    \end{minipage}\end{flushright}\vspace{.5\baselineskip}}
%
% \title{The \Lpack{epigraph} package\thanks{This
%        file (\texttt{\dtxfile}) has version number \fileversion, last revised
%        \filedate.}}
%
% \author{%
% Author: Peter Wilson, Herries Press\\
% Maintainer: Will Robertson\\
% \texttt{will dot robertson at latex-project dot org}
% }
% \date{\filedate}
% \maketitle
% \begin{abstract}
%    The \Lpack{epigraph} package can be used to typeset a relevant
% quotation or saying as an \emph{epigraph}, usually just after a
% sectional heading. Various handles are provided to tweak the appearance.
% \end{abstract}
% \tableofcontents
%
% \StopEventually{}
%
% 
%
% \section{Introduction}
%
% \tepi{My soul, seek not the life of immortals; but enjoy to the full
%       the resources that are within your reach}
%      {\textit{Pythian Odes \\ Pindar}}
%
% Some authors like to add an interesting quotation at either the start
% or end of a section. The \Lpack{epigraph} package provides commands
% to assist in the typesetting of a single epigraph. Other authors like to 
% add many such quotations and the package provides environments to
% cater for these as well.
%
% This manual is typeset according to the conventions of the
% \LaTeX{} \textsc{docstrip} utility which enables the automatic
% extraction of the \LaTeX{} macro source files~\cite{GOOSSENS94}.
%
%    Section~\ref{sec:usc} describes the usage of the package.
% Commented source code for the package is in Section~\ref{sec:code}.
%
% \section{The \Lpack{epigraph} package} \label{sec:usc}
%
% \tepi{The whole is more than the sum of the parts.}
%      {\textit{Metaphysica \\ Aristotle}}
%
%    The \Lpack{epigraph} package provides commands for typesetting
% a single epigraph and environments for typesetting a list of epigraphs.
% Epigraphs can be typeset at either the left, the center or the right of 
% the typeblock. A few example eipgraphs are exhibited here, and
% others can be found in an article by
% Christina Thiele~\cite{TTC199}.
%
% \subsection{The \texttt{epigraph} command}
%
%  The original inspiration for |\epigraph| was Doug Schenck's
% for the epigraphs in our book~\cite{EBOOK}. That was hard wired for
% the purpose at hand. The version here provides much more flexibility.
%
%
%
% \DescribeMacro{\epigraph}
%  The command |\epigraph{|\meta{text}|}{|\meta{source}|}| 
% typesets
% an epigraph using \meta{text} as the main text of the epigraph and
% \meta{source} being the original author (or book, article, etc.)
% of the quoted text. By default the epigraph is placed at the right hand 
% side of the textblock, and the \meta{source} is typeset at the bottom
% right of the \meta{text}.
%
%
% \subsection{The \texttt{epigraphs} environment}
%
% \DescribeEnv{epigraphs}
% The |epigraphs| environment typesets a list of epigraphs, and by default
% places them at the right hand side of the textblock.
%
% \DescribeMacro{\qitem}
%  Each epigraph in the list is specified by a 
% |\qitem{|\meta{text}|}{|\meta{source}|}| command (analagous to the |\item|
% command in ordinary list environments).
% By default, the \meta{source} is typeset at the bottom right of the
% \meta{text}. 
%
% 
%
% \subsection{General}
%
% \tepi{Example is the school of mankind, and they will learn at no other.}
%      {\textit{Letters on a Regicide Peace}\\ \textsc{Edmund Burke}}
%
%   The commands described in this section apply to both the |\epigraph|
% command and the |epigraphs| environment. But first of all, note that an
% epigraph immediately after a heading will cause the first paragraph
% of the following text to be indented. If you want the initial paragraph
% to have no indentation, then start it with the |\noindent| command.
%
% \DescribeMacro{\epigraphwidth}
% \DescribeMacro{\textflush}
%  The epigraphs are typeset in a minipage of width |\epigraphwidth|. The default
% value for this can be changed using the |\setlength| command. Typically,
% epigraphs are typset in a measure much less than the width of the textblock.
% In order to avoid bad line breaks, the \meta{text} is normally typeset 
% raggedright. 
% The |\textflush| command controls the \meta{text} typesetting style,
% and it can be redefined from its default value of
% \texttt{flushleft} (which produces raggedright). The sensible values
% are \texttt{center} for centered text, \texttt{flushright} for raggedleft
% text, and \texttt{flushepinormal} for normal justified text.
%
%    If by any chance you want the \meta{text} to be typeset in some
% other layout style, the easiest
% way to do this is by defining a new environment which sets the paragraphing
% parameters to your desired values. For example, as the \meta{text} is
% typeset in a minipage, there is no paragraph indentation. If you
% want the paragraphs to be indented and justified then define
% a new environment like:\\
% |\newenvironment{myparastyle}{\setlength{\parindent}{1em}}{}| \\
% and use it as: \\
% |\renewcommand{\textflush}{myparastyle}|. 
%
% \DescribeMacro{\epigraphflush}
%  As noted, the default position of epigraphs is at the right hand side
% of the textblock. The positioning is controlled by |\epigraphflush|
% whose default value is \texttt{flushright}. This can be changed
% to \texttt{flushleft} for positioning at the left hand side or to
% \texttt{center} for positioning at the center of the textblock.
%
% \DescribeMacro{\sourceflush}
% The |\sourceflush| command controls the position of the \meta{source}.
% The default value is \texttt{flushright}. It can be changed to
% \texttt{flushleft}, \texttt{center} or \texttt{flushepinormal}.
%
% For example, to have epigraphs centered with the \meta{source} at the left,
% add the following to your
% document (after loading the \Lpack{epigraph} package):
% \begin{verbatim}
% \renewcommand{\epigraphflush}{center}
% \renewcommand{\sourceflush}{flushleft}
% \end{verbatim}
%
% \DescribeMacro{\epigraphsize}
% Epigraphs are often typeset in a smaller font than the main text. The
% |\epigraphsize| command sets the font size to be used.
% If you don't like the default value, change it by redefining the command,
% for example: \\
% |    \renewcommand{\epigraphsize}{\footnotesize}|
%		
% \DescribeMacro{\epigraphrule}
% By default, a rule is drawn between the \meta{text} and \meta{source},
% with the rule thickness being given by the value of |\epigraphrule|.
% The value can be changed by using the \LaTeX{} |\setlength| command.
% A value of \texttt{0pt} will eliminate the rule. Personally, I dislike
% the rule in the list environments.
%
% \DescribeMacro{\beforeepigraphskip}
% \DescribeMacro{\afterepigraphskip}
% The two |...skip| commands specify the amount of vertical space inserted
% before and after typeset epigraphs. Again, these can be changed by
% |\setlength|. It is desireable that the sum of their values should be an 
% integer multiple of the |\baselineskip|.
%
% Note that you can use normal \LaTeX{} commands in the \meta{text} and
% \meta{source} arguments. You may wish to use different fonts for the
% \meta{text} (say roman) and the \meta{source} (say italic).
%
% The epigraph at the start of this section can be specified as:
% \begin{verbatim}
% \epigraph{Example is the school of mankind,
%           and they will learn at no other.}%
%  {\textit{Letters on a Regicide Peace}\\ \textsc{Edmund Burke}}
% \end{verbatim}
%
% \subsection{Epigraphs before chapter headings}
%
%    The |\epigraph| command and the |epigraphs| environment typeset
% an epigraph at the point in the text where they are placed. The
% first thing that a |\chapter| command does is to start off a new page,
% so another mechanism is provided for placing an epigraph just before
% a chapter heading.
%    
% \DescribeMacro{\epigraphhead}
%  The |\epigraphhead[|\meta{distance}|]{|\meta{text}|}| stores \meta{text} 
% for printing at \meta{distance} below the header on a page.
% \meta{text} can be ordinary text or, more likely, can be either an
% |\epigraph| command or an |epigraphs| environment. By default, the 
% epigraph will be typeset at the righthand margin.
% If the command is immediately preceeded by a |\chapter| or |\chapter*| 
% command, the epigraph is typeset on the chapter title page.
%
%    The default value for the optional \meta{distance} argument is set so
% that an |\epigraph| consisting of a single line of quotation and a single
% line denoting the source is aligned with the bottom of the `Chapter X'
% line produced by the |\chapter| command. In other cases you will
% have to experiment with the \meta{distance} value. The value for
% \meta{distance} can be either a integer or a real number. The units
% are in terms of the current value for |\unitlength|. A typical value
% for \meta{distance} for a single line quotation and source for 
% a |\chapter*| might be about 70 (points). A positive value
% of \meta{distance} places the epigraph below the page heading and a negative
% value will raise it above the page heading.
%
%    Here's some example code:
% \begin{verbatim}
% \chapter*{Celestial navigation}
% \epigraphhead[70]{\epigraph{Star crossed lovers.}{\textit{The Bard}}}
% \end{verbatim}
%
% The |\epigraphhead| command changes the page style for the page on
% which it is specified, so there should be no text between the
% |\chapter| and the |\epigraphhead| commands.
%
% The \meta{text} argument is put into a minipage of width |\epigraphwidth|.
% If you use something other than |\epigraph| or |epigraphs| for the
% \meta{text} argument, you may have to so some positioning of the text
% yourself so that it is properly located in the minipage. For example
% \begin{verbatim}
% \chapter{Short}
% \renewcommand{\epigraphflush}{center}
% \epigraphhead{\centerline{Short quote}}
% \end{verbatim}
%
% \changes{v1.3}{1999/12/01}{Added description of dropchapter and undodrop}
% \DescribeMacro{\dropchapter}
% \DescribeMacro{\undodrop}
% If a long epigraph is placed before a chapter title it is possible that the
% bottom of the epigraph may interfere with the chapter title. The command
% |\dropchapter{|\meta{length}|}| will lower any subsequent chapter titles by 
% \meta{length}; a negative \meta{length} will raise the titles.
% The command |\undodrop| restores subsequent chapter titles to their default
% positions. For example:
% \begin{verbatim}
% \dropchapter{2in}
% \chapter{Title}
% \epigraphhead{long epigraph}
% \undodrop
% \end{verbatim}
%
% \changes{v1.2}{1999/09/12}{Added description of cleartoevenpage uses}
% \DescribeMacro{\cleartoevenpage}
% On occasions it may be desirable to put something (e.g., an epigraph, a map,
% a picture) on the page facing the start
% of a chapter, where the something belongs to the chapter that is about to 
% start rather than the chapter that has just ended. In order to do this 
% in a document that is going to be printed
% doublesided, the chapter must start on an odd numbered page and the 
% pre-chapter material put on the immediately preceeding even numbered page.
% The |\cleartoevenpage| command is like the |\cleardoublepage| except
% that the page following the command will be an even numbered page, and the
% command takes an optional argument, i.e., |\cleartoevenpage{|[arg|]|,
% which is applied to the skipped page (if any).
%
%    Here is an example:
% \begin{verbatim}
% ... end previous chapter.
% \cleartoevenpage
% \begin{center}
% \begin{picture}... \end{picture}
% \end{center}
% \chapter{Next chapter}
% \end{verbatim}
% If the style is such that chapter headings are put at the top of the pages,
% then it would be advisable to include |\thispagestyle{empty}| (or |plain|)
% immediately after |\cleartoevenpage| to avoid a heading related to the
% previous chapter from appearing on the page. 
%
% If the something is like a figure with a numbered caption and the numbering
% depends on the chapter numbering, then the numbers have to be hand set (unless
% you define a special chapter command for the purpose). For example:
% \begin{verbatim}
% ... end previous chapter.
% \cleartoevenpage[\thispagestyle{empty}] % skipped page, if any, to be empty
% \thispagestyle{plain}
% \addtocounter{chapter}{1} % increment the chapter number
% \setcounter{figure}{0}    % initialise figure counter
% \begin{figure}
% ...
% \caption{Pre chapter figure}
% \end{figure}
%
% \addtocounter{chapter}{-1} % decrement the chapter number
% \chapter{Next chapter}     % increments chapter number, initialises figure number
% \addtocounter{figure}{1}   % to account for pre-chapter figure
% \end{verbatim}
% 
%
% \subsection{Epigraphs on Part pages}
%
%     The \Lpack{epigraph} package as it stands cannot put an epigraph on the
% same page as a |\part| or |\part*| title page in 
% a \Lpack{book} or \Lpack{report} class. This is because the |\part| command
% internally does some page flipping before and after the title page.
% However, it is easy enough to put epigraphs on part pages.
%
% \begin{itemize}
% \item Create a file called, say, \file{epipart.sty} which looks like this:
% \begin{verbatim}
% % epipart.sty
% \let\@epipart\@endpart
% \renewcommand{\@endpart}{\thispagestyle{epigraph}\@epipart}
% \endinput
% \end{verbatim}
%
% \item Start your document like:
% \begin{verbatim}
% \documentclass[...]{...}
% \usepackage{epigraph}
% \usepackage{epipart}
% \end{verbatim}
%
% \item Immediately \emph{before} each |\part| command put an 
% |\epigraphhead| command. For example:
% \begin{verbatim}
% \epigraphhead[300]{Epigraph text}
% \part{Part title}
% \end{verbatim}
% The value of the optional argument may need changing to vertically adjust
% the position of the epigraph. If there is any |\part| that does not have an
% epigraph then an empty |\epigraphhead| command (i.e., |\epigraphhead{}|)
% must be placed immediately befor the |\part| command.
%
% \end{itemize}
%
%     A similar scheme may be used for epigraphs on other kinds of pages. 
% The essential
% trick is to make sure that the \pstyle{epigraph} pagestyle is used for
% the page.
%
%
% \subsection{Epigraphed bibliographies}
% \changes{v1.2}{1999/09/12}{Added application of an epigraph to a bibliography}
% One author asked how to associate an epigraph with his bibliography. The
% following is one way to do it (the example is based on the book class).
% \begin{enumerate}
% \item Copy the definition of the |thebibliography| environment from 
% \file{book.cls} to your own file called, say \file{epibib.sty}.
%
% \item Edit \file{epibib.sty} to include the definition of a vacuous
% command called, say, |\bibadd|. Edit the definition of the |thebibliography|
% to include |\bibadd| immediately before the |\list| command. The relevant
% portions of \file{epibib.sty} will look like this:
% \begin{verbatim}
% % epibib.sty
% ...
% \newcommand{\bibadd}{}
% \renewenvironment{thebibliography}[1]
%   {\chapter*{\bibname
%      \@mkboth{\MakeUppercase\bibname}{\MakeUppercase\bibname}}%
%    \bibadd
%    \list{\@biblabel .....
% \end{verbatim}
%
% \item In your document, start it off like this:
% \begin{verbatim}
% \documentclass...
% \usepackage{epigraph}
% \usepackage{epibib}
% \end{verbatim}
% At the point where the bibliography is to go, do something like the following:
% \begin{verbatim}
% ...
% \newcommand{\bepi}{<definition of epigraph>}
% \renewcommand{\bibadd}{\bepi}
% \bepi  % seems to be required if using \epigraphhead in \bepi
% \begin{thebibliography}{...} % or \bibliography{...}
% ...
% \end{verbatim}
% \end{enumerate}
%    The same idea can be applied to document elements like an abstract or an
% index. Of course |\bibadd| can be defined to be anything you want to typeset
% between the bibliography heading and the start of the reference list.
%
%
% \section{The package code} \label{sec:code}
%
% \tepi{And now for something completely different.}{\textit{Monty Python}}
%
%    Announce the name and version of the package, which requires
% \LaTeXe.
%    \begin{macrocode}
%<*usc>
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{epigraph}[2009/09/02 v1.5c typesetting epigraphs]
%    \end{macrocode}
%
% \begin{macro}{\beforeepigraphskip}
% \begin{macro}{\afterepigraphskip}
% \begin{macro}{\epigraphwidth}
% \begin{macro}{\epigraphrule}
%    The several length commands, which can be changed by the user with
% |\setlength|.
%    \begin{macrocode}
\newlength{\beforeepigraphskip}
  \setlength{\beforeepigraphskip}{.5\baselineskip}
\newlength{\afterepigraphskip}
  \setlength{\afterepigraphskip}{.5\baselineskip}
\newlength{\epigraphwidth}
  \setlength{\epigraphwidth}{.4\textwidth}
\newlength{\epigraphrule}
  \setlength{\epigraphrule}{.4\p@}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\epigraphsize}
%    The size of the font to be used.
%    \begin{macrocode}
\newcommand{\epigraphsize}{\small}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\epigraphflush}
% \begin{macro}{\textflush}
% \begin{macro}{\sourceflush}
%  The three commands to position epigraphs in the textblock and to position
%  the components of the epigraph.
%    \begin{macrocode}
\newcommand{\epigraphflush}{flushright}
\newcommand{\textflush}{flushleft}
\newcommand{\sourceflush}{flushright}

%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{environment}{flushleftright}
%    An environment for |\textflush| to use normal minipage typesetting. It
% is vacuous. Defining this was a mistake as the \Lpack{ccaption}
% package also defines |\flushleftright|.
% \changes{v1.5a}{2002/10/22}{Made flushleftright environment an error}
%    \begin{macrocode}
\AtBeginDocument{%
  \@ifundefined{flushleftright}{%
    \newenvironment{flushleftright}{%
      \PackageError{epigraph}%
      {The flushleftright environment has been removed.\MessageBreak
       Use the flushepinormal environment instead}{\@ehc}}{}}%
    {\PackageWarningNoLine{epigraph}%
     {flushleftright has been previously defined.\MessageBreak
      Use flushepinormal for epigraphs instead}}}

%    \end{macrocode}
% \end{environment}
%
% \begin{environment}{flushepinormal}
%    An environment for |\textflush| to use normal minipage typesetting. It
% is vacuous.
% \changes{v1.5a}{2002/10/22}{Added flushepinormal environment}
%    \begin{macrocode}
\newenvironment{flushepinormal}{}{}

%    \end{macrocode}
% \end{environment}
%
%
% \begin{macro}{\@epirule}
%  The internal command to draw a rule between text and source.
%    \begin{macrocode}
\newcommand{\@epirule}{\rule[.5ex]{\epigraphwidth}{\epigraphrule}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@epitext}
% The internal command to typeset the \meta{text}. Put it into a minipage of the
% right size and typeset per |\textflush|.
%    \begin{macrocode}
\newcommand{\@epitext}[1]{%
  \begin{minipage}{\epigraphwidth}\begin{\textflush} #1\\
%    \end{macrocode}
%  Draw a rule if it will be visible, otherwise add some extra vertical space.
%    \begin{macrocode}
    \ifdim\epigraphrule>\z@ \@epirule \else \vspace*{1ex} \fi
  \end{\textflush}\end{minipage}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@episource}
%    The internal command for typesetting the \meta{source}, which is put 
% into a minipage and typeset according to |\sourceflush|.
%    \begin{macrocode}
\newcommand{\@episource}[1]{%
  \begin{minipage}{\epigraphwidth}\begin{\sourceflush} #1\end{\sourceflush}
  \end{minipage}}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\epigraph}
%    Having got the preliminaries out of the way, here's the user command
% for a single epigraph. This is set in a minipage to prevent breaking
% across a page. Position it according to |\epigraphflush|.
%    \begin{macrocode}
\newcommand{\epigraph}[2]{\vspace{\beforeepigraphskip}
  {\epigraphsize\begin{\epigraphflush}\begin{minipage}{\epigraphwidth}
    \@epitext{#1}\\ \@episource{#2}
    \end{minipage}\end{\epigraphflush}
    \vspace{\afterepigraphskip}}}
%    \end{macrocode}
% \end{macro}
%
%
% \begin{macro}{\qitem}
% \begin{macro}{\qitemlabel}
%    |\qitem| is the epigraph list version of |\item|. 
% Set everything inside a minipage.
%    \begin{macrocode}
\newcommand{\qitem}[2]{{\raggedright\item \begin{minipage}{\epigraphwidth}
  \@epitext{#1}\\ \@episource{#2}
  \end{minipage}}}
%    \end{macrocode}
%  |\qitemlabel| is needed for a list as well. It is not going to 
% typeset anything.
%    \begin{macrocode}
\newcommand{\qitemlabel}[1]{\hfill}
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
%
% \begin{environment}{epigraphs}
%  Now for the epigraph list. This is defined in terms of a |list|
% environment. 
%    \begin{macrocode}
\newenvironment{epigraphs}{%
%    \end{macrocode}
% Do the vertical space, set the font size, position according to 
% |\epigraphflush|, and put everyting into a minipage.
%    \begin{macrocode}
  \vspace{\beforeepigraphskip}\begin{\epigraphflush}
  \epigraphsize
  \begin{minipage}{\epigraphwidth}
   \list{}%
%    \end{macrocode}
%  Make the list just fit the minipage (i.e., no indents).
%    \begin{macrocode}
    {\itemindent\z@ \labelwidth\z@ \labelsep\z@
     \leftmargin\z@ \rightmargin\z@
     \let\makelabel\qitemlabel}}%
  {\endlist\end{minipage}\end{\epigraphflush}
   \vspace{\afterepigraphskip}}
%    \end{macrocode}
% \end{environment}
%
% \subsection{Epigraphs before a chapter title}
%
% \begin{macro}{\cleartoevenpage}
% Like |\cleardoublepage| except that it skips pages until an even one, and
% its optional argument is applied to the skipped page, if any.
% The code is based on the kernel |\cleardoublepage| in \file{ltoutput.dtx}.
% \changes{v1.2}{1999/09/12}{Added \cs{cleartoevenpage} command}
% \changes{v1.5}{2000/02/20}{Added optional arg to \cs{cleartoevenpage}}
%    \begin{macrocode}
\providecommand{\cleartoevenpage}[1][\@empty]{%
  \clearpage%
  \ifodd\c@page\hbox{}#1\clearpage\fi}
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@epichapapp}
% \begin{macro}{\dropchapter}
% \begin{macro}{\undodrop}
% \changes{v1.3}{1999/12/01}{Defined chapter dropping and support commands}
%    Commands to drop and restore positions of chapter titles. Dropping is
% accomplished by inserting vertical space before the |\@chapapp| command.
%    \begin{macrocode}
\newcommand{\dropchapter}[1]{%
  \let\@epichapapp\@chapapp
  \renewcommand{\@chapapp}{\vspace*{#1}\@epichapapp}}
\newcommand{\undodrop}{\let\@chapapp\@epichapapp}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
%
% Placing an epigraph before a chapter title uses the scheme outlined
% by Piet van Oostrum~\cite{OOSTRUM96}. This is to put a zero sized
% picture into the page header. 
%
% \begin{macro}{\if@epirhs}
% \begin{macro}{\if@epicenter}
%  Two booleans for testing whether an epigraph is to be at the RH margin,
% centered, or at the LH margin. The default is RH margin.
%    \begin{macrocode}
\newif\if@epirhs     \@epirhstrue
\newif\if@epicenter  \@epicentertrue
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\@epipos}
%    This routine sets the |\if@epi...| booleans according to the value of
% |\epigraphflush|. If |\epigraphflush| is neither |center| nor |flushleft|
% then it defaults to |flushright|. We have to use this to be upward 
% compatible with |\epigraphflush| being set by the user with |\renewcommand|.
%    \begin{macrocode}
\newcommand{\@epipos}{
  \long\def\@ept{flushleft}
  \ifx\epigraphflush\@ept
    \@epirhsfalse \@epicenterfalse
  \else
    \long\def\@ept{center}
    \ifx\epigraphflush\@ept
      \@epirhsfalse \@epicentertrue
    \else
      \@epirhstrue  \@epicenterfalse
    \fi
  \fi}
%    \end{macrocode}
% \end{macro}
%
%
% \begin{macro}{\epigraphhead}
% |\epigraphhead[|\meta{distance}|]{|\meta{text}|}| puts \meta{text} at
% \meta{distance} (a number, not a length) below the header at the 
% page position specified by |\epigraphflush|.
%    \begin{macrocode}
\newcommand{\epigraphhead}[2][95]{%
%    \end{macrocode}
% We have to use |\def| instead of the normal \LaTeX{} definition commands
% as we will keep on
% (re)defining things. For reasons that are not fully clear to me \LaTeX{}
% doesn't seem to like me using a |\savebox| for storing the epigraph text,
% so I'll use a command instead.
%    \begin{macrocode}
  \def\@epitemp{\begin{minipage}{\epigraphwidth}#2\end{minipage}}
%    \end{macrocode}
% Define an |epigraph| page style.
%    \begin{macrocode}
  \def\ps@epigraph{\let\@mkboth\@gobbletwo
%    \end{macrocode}
% There are three possible definitions for |\@oddhead| depending on the
% value of |\epigraphflush|. We call |\@epipos| to decide which one to do.
%    \begin{macrocode}
    \@epipos
    \if@epirhs
      \def\@oddhead{\hfil\begin{picture}(0,0)
                         \put(0,-#1){\makebox(0,0)[r]{\@epitemp}}
                         \end{picture}}
    \else
      \if@epicenter
        \def\@oddhead{\hfil\begin{picture}(0,0)
                           \put(0,-#1){\makebox(0,0)[b]{\@epitemp}}
                           \end{picture}\hfil}
      \else
        \def\@oddhead{\begin{picture}(0,0)
                           \put(0,-#1){\makebox(0,0)[l]{\@epitemp}}
                           \end{picture}\hfil}
      \fi
    \fi
    \let\@evenhead\@oddhead
    \def\@oddfoot{\reset@font\hfil\thepage\hfil}
    \let\@evenfoot\@oddfoot}
%    \end{macrocode}
% Make |epigraph| be the page style for this page.
%    \begin{macrocode}
  \thispagestyle{epigraph}}
%    \end{macrocode}
% \end{macro}
%
%
%    The end of this package.
%    \begin{macrocode}
%</usc>
%    \end{macrocode}
%
%
% \bibliographystyle{alpha}
%
% \begin{thebibliography}{GMS94}
%
% \bibitem[GMS94]{GOOSSENS94}
% Michel Goossens, Frank Mittelbach, and Alexander Samarin.
% \newblock {\em The LaTeX Companion}.
% \newblock Addison-Wesley Publishing Company, 1994.
%
% \bibitem[vO96]{OOSTRUM96}
% Piet van Oostrum
% \newblock {\em Page layout in \LaTeX}, June 1996.
% \newblock (Available from CTAN as file \texttt{fancyhdr.tex}).
%
% \bibitem[SW94]{EBOOK}
% Douglas Schenck and Peter Wilson.
% \newblock {\em Information Modeling the EXPRESS Way}.
% \newblock Oxford University Press, 1994 (ISBN 0-19-508714-3).
%
% \bibitem[Thi99]{TTC199}
% Christina Thiele.
% \newblock \emph{The Treasure Chest: Package tours from CTAN},
% \newblock TUGboat, vol.~20, no.~1, pp~53--58, March 1999.
%
% \end{thebibliography}
%
%
% \Finale
% \PrintIndex
%
\endinput

%% \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         \~}