summaryrefslogtreecommitdiff
path: root/macros/latex/contrib/amsrefs/mathscinet.dtx
blob: 300d6701a3c1e15f3f9a675d0a8fa25c6c4c56ed (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
% \def\filename{mathscinet.dtx}
% \def\fileversion{2.01}
% \def\filedate{2004/06/30}
%
% \iffalse meta-comment
%
% American Mathematical Society
% Technical Support
% Publications Technical Group
% 201 Charles Street
% Providence, RI 02904
% USA
% tel: (401) 455-4080
%      (800) 321-4267 (USA and Canada only)
% fax: (401) 331-3842
% email: tech-support@ams.org
%
% Copyright 2001, 2010 American Mathematical Society.
%
% 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.
% The latest version of this license is in
%   http://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions of LaTeX
% version 2005/12/01 or later.
% 
% This work has the LPPL maintenance status `maintained'.
% 
% The Current Maintainer of this work is the American Mathematical
% Society.
%
% \fi
%
% \iffalse
%<*driver>
\NeedsTeXFormat{LaTeX2e}
\documentclass[draft]{amsdtx}

\usepackage{mathscinet}

\newcommand{\uchar}[1]{{\small \texttt{U+#1}}}

\newcommand{\enc}{\texttt}

\newenvironment{chartable}{%
    \begin{tabular}{%
        l@{\extracolsep{1em}}%
        l@{\extracolsep{1em}}%
        r@{\extracolsep{2em}}%
        l@{\extracolsep{1em}}%
        l@{\extracolsep{1em}}%
        r}%
}{%
    \end{tabular}%
}

\makeatletter

\DeclareTextCommandDefault{\xudot}{\@underaccent\@empty{'137}}

\makeatother

\MakeShortVerb{\|}

\begin{document}
\title{The \pkg{mathscinet} package}
\author{American Mathematical Society}
\date{Version \fileversion, \filedate}
\DocInput{mathscinet.dtx}
\end{document}
%</driver>
% \fi
%
% \maketitle
% \section{Introduction}
%
%    The \pkg{mathscinet} packages provides definitions for certain
%    commands that occasionally occur in bibliographic data exported
%    from MathSciNet and that are not provided by \latex/.
%
%    \textbf{Warning:} Although the macros provided in this package
%    are probably acceptable if all you need to do is format an entry
%    downloaded from MathSciNet, they should probably not be used for
%    other purposes.  In general, if you are trying to typeset
%    material in any languages that require these characters, you are
%    better off using specialized fonts and encodings for those
%    languages.
%
%    All Unicode character references are taken from \emph{The Unicode
%    Standard, Version~3.0} (Addison-Wesley, 2000).
%
% \StopEventually{}
%
% \section{Implementation}
%    Standard declaration of package name and date.
%    \begin{macrocode}
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{mathscinet}[2002/04/17 v1.05]
\RequirePackage{textcmds}\relax
%    \end{macrocode}
%
%    \begin{macro}{\setboxz@h}
%    A useful abbreviation borrowed from \pkg{amsgen}.
%    \begin{macrocode}
\providecommand\setboxz@h{\setbox\z@\hbox}
%    \end{macrocode}
%    \end{macro}
%
%    \subsection{Math font commands}
%
%    \begin{macro}{\bold}
%    \begin{macro}{\scr}
%    These are simple aliases of core \latex/ commands.
%    \begin{macrocode}
\providecommand{\bold}{\mathbf}
\providecommand{\scr}{\mathcal}
%    \end{macrocode}
%    \end{macro}
%    \end{macro}
%
%    \begin{macro}{\germ}
%    Since this doesn't correspond to a core \latex/ command, we
%    generate an error if no appropriate definition is available.
%    \begin{macrocode}
\AtBeginDocument{%
    \@ifundefined{mathfrak}{%
        \providecommand{\germ}{%
            \PackageError{mathscinet}{To use the \string\germ\space
                command, please load the amsfonts package}\@ehc
        }%
    }{%
        \providecommand{\germ}{\mathfrak}%
    }%
}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\romsup}
%    \begin{macro}{\asup}
%    The \cs{tsup} command comes from the \pkg{textcmds} package.
%    \begin{macrocode}
\providecommand{\romsup}{\tsup}
\providecommand{\asup}{\tsup}
%    \end{macrocode}
%    \end{macro}
%    \end{macro}
%
%    \begin{macro}{\hslash}
%    Planck's constant over~$2\pi$:~$\hslash$ (\uchar{210F}).
%
%    If the \pkg{amssymb} package isn't loaded, we just want this to
%    be an alias for |\hbar|, which is defined in the \latex/ kernel
%    (and then redefined by the \pkg{amssymb} package).  If the
%    \pkg{amssymb} package is loaded, we want to use its definition
%    of~|\hslash|.  To prevent problems if \pkg{amsrefs} is loaded
%    before \pkg{amssymb}, we defer our definition of \cn{hslash}
%    until after all packages have been loaded.
%    \begin{macrocode}
\AtBeginDocument{\providecommand{\hslash}{\hbar}}
%    \end{macrocode}
%    \end{macro}
%
%    \subsection{Arabic transliteration}
%
%    \begin{macro}{\rasp}
%    Transliteration of the Arabic letter \emph{hamza}
%    (\uchar{0621}):~\rasp\ (\uchar{02BE}).
%    \begin{macrocode}
\ProvideTextCommandDefault{\rasp}{\leavevmode\raise.45ex\hbox{$\rhook$}}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\lasp}
%    Transliteration of the Arabic letter \emph{ain}
%    (\uchar{0639}):~\lasp\ (\uchar{02BF}).
%    \begin{macrocode}
\ProvideTextCommandDefault{\lasp}{\leavevmode\raise.45ex\hbox{$\lhook$}}
%    \end{macrocode}
%    \end{macro}
%
%    \subsection{Latin Extended-A (\texttt{latin1}) characters}
%
%    These are based on Barbara Beeton's definitions from
%    \fn{amsclass.dtx}.
%
%    \begin{macro}{\Dbar}
%    Latin capital letter D with stroke:~\Dbar\ (\uchar{0110}).  In the
%    T1 encoding, we just use |\DJ|; otherwise we fake it.
%    \begin{macrocode}
\ProvideTextCommand{\Dbar}{T1}{\DJ}

\ProvideTextCommandDefault{\Dbar}{%
    \leavevmode\lower.5ex\rlap{\hskip-.07em\accent"16}D%
}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\dbar}
%    Latin lower letter~d with stroke:~\dbar\ (\uchar{0111}).  In the
%    T1 encoding, we just use |\dj|; otherwise we fake it.
%    \begin{macrocode}
\ProvideTextCommand{\dbar}{T1}{\dj}
%    \end{macrocode}
%    If it looks like this is a small-caps font, we adjust the spacing
%    appropriately.
%    \begin{macrocode}
\ProvideTextCommandDefault{\dbar}{%
    \begingroup
        \edef\@tempa{\scdefault}%
        \ifx\@tempa\f@shape
            \dimen@-.75ex
            \dimen@i-.08em
        \else
            \dimen@.02ex
            \dimen@i.1em
        \fi
        \leavevmode\raise\dimen@\rlap{\hskip\dimen@i\char"16}d%
    \endgroup
}
%    \end{macrocode}
%    \end{macro}
%
%    \subsection{Cyrillic transliteration}
%
%    \begin{macro}{\cprime}
%    Transliteration of the Cyrillic letter soft sign
%    (\uchar{042C}):~\cprime.
%    \begin{macrocode}
\ProvideTextCommandDefault{\cprime}{\tprime}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\cdprime}
%    Transliteration of the Cyrillic letter hard sign
%    (\uchar{042A}):~\cdprime.
%    \begin{macrocode}
\ProvideTextCommandDefault{\cdprime}{\tprime\tprime}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\bud}
%    Ditto.
%    \begin{macrocode}
\ProvideTextCommandDefault{\bud}{\cdprime}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\cydot}
%    Vertically centered dot.
%    \begin{macrocode}
\ProvideTextCommandDefault{\cydot}{\leavevmode\raise.4ex\hbox{.}}
%    \end{macrocode}
%    \end{macro}
%
%    \subsection{Miscellaneous diacritics (aka Frankenstein's\\
%    diacritics)}
%
%    \begin{macro}{\save@sf}
%    When putting together an accented character from bits and pieces,
%    the |\spacefactor| of the base character often gets lost in the
%    shuffle.  We use essentialy the same technique as |\add@accent|
%    to save and restore the spacefactor, but we wrap in in a pair of
%    macros for convenience.
%    \begin{macrocode}
\def\save@sf{%
    \ifmmode\else\global\mathchardef\accent@spacefactor\spacefactor\fi
}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\restore@sf}
%    And here's the corresponding restore.
%    \begin{macrocode}
\def\restore@sf{\ifmmode\else\spacefactor\accent@spacefactor\fi}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\@underaccent}
%    This is perhaps the most interesting macro in this package (which
%    admittedly isn't saying much). It attempts to convert a character
%    (usually one of the standard above-letter diacritics like~\"{})
%    into an underhanging diacritic (like~\dudot{\hbox to
%    .5em{\hss}}).  This is similar in spirit to the way that the
%    \enc{OT1} \cn{b} command converts a macron into a bar-under
%    accent, or the way that \cn{d} converts a period into an
%    underhanging dot.  However, the technique used here is a little
%    more complicated and, hopefully, a little more general, in the
%    sense of requiring fewer ad-hoc parameters.  It only contains one
%    magic constant (.2\,ex), which seems to provide reasonable
%    results for all of the Computer Modern fonts.
%
%    The basic algorithm is as follows:
%
%    \begin{enumerate}
%
%    \item
%    Create a box~$B$ containing the base character at its natural
%    height, depth, and width.
%
%    \item
%    Create a box~$d$ consisting of the diacritic centered in a space
%    equal to the width of~$B$.
%
%    \item
%    Lower box~$d$ by the sum of its height (to bring the top of~$d$
%    down to the baseline) plus the depth of $B$ (to bring the top
%    of~$d$ down to the bottom of~$B$) plus .2\,ex (to provide the
%    spacing between the bottom of the letter and the top of the
%    diacritic).  Call the new box~$d'$.
%
%    \item
%    Create a new box~$C$ by superimposing boxes $B$ and~$d'$.
%
%    \item
%    If the height of~$d$ was greater than 1\,ex, reset the depth of
%    box~$C$ to the sum of the depth of~$B$ and 1\,ex less than the
%    height of~$d$.  (See the appendix for a discussion of this step.)
%
%    \end{enumerate}
%
%    \begin{macrocode}
\def\@underaccent#1#2#3{%
    \leavevmode
    \begingroup
        \ifmmode\let\@mathtoggle$\else\let\@mathtoggle\relax\fi
        \setboxz@h{\@mathtoggle#3\save@sf\@mathtoggle}%
        \setbox\@ne\hb@xt@\wd\z@{%
            \hss\fontshape\updefault\rmfamily#1\char#2\hss
        }%
        \dimen@\ht\@ne
        \advance\dimen@\dp\z@
        \advance\dimen@.2ex
        \setboxz@h{\lower\dimen@\rlap{\copy\@ne}\unhbox\z@}%
        \ifdim\ht\@ne>1ex
            \advance\dimen@-1.2ex
            \dp\z@\dimen@
        \fi
        \box\z@
        \restore@sf
    \endgroup
}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\utilde}
%    Tilde below (\uchar{0330}):
%
%    \begin{chartable}
%    |\utilde{E}|   & \utilde{E}    & \uchar{1E1A} &
%    |\utilde{e}|   & \utilde{e}    & \uchar{1E1B} \\
%    |\utilde{I}|   & \utilde{I}    & \uchar{1E2C} &
%    |\utilde{i}|   & \utilde{i}    & \uchar{1E2D} \\
%    |\utilde{U}|   & \utilde{U}    & \uchar{1E74} &
%    |\utilde{u}|   & \utilde{u}    & \uchar{1E75}
%    \end{chartable}
%    \begin{macrocode}
\DeclareTextCommandDefault{\utilde}{\@underaccent\@empty{`\~}}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\uarc}
%    Breve below (\uchar{032E}):
%
%    \begin{chartable}
%    |\uarc{H}| & \uarc{H}  & \uchar{1E2A} &
%    |\uarc{h}| & \uarc{h}  & \uchar{1E2B}
%    \end{chartable}
%    \begin{macrocode}
\DeclareTextCommandDefault{\uarc}{\@underaccent\@empty{'025}}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\lfhook}
%    Comma below (\uchar{0326}):
%
%    \begin{chartable}
%    |\lfhook{S}|   & \lfhook{S}    & \uchar{0218} &
%    |\lfhook{s}|   & \lfhook{s}    & \uchar{0219} \\
%    |\lfhook{T}|   & \lfhook{T}    & \uchar{021A} &
%    |\lfhook{t}|   & \lfhook{t}    & \uchar{021B}
%    \end{chartable}
%    \begin{macrocode}
\DeclareTextCommandDefault{\lfhook}{\@underaccent\supsize{`\,}}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\dudot}
%    Diaeresis below (\uchar{0324}):
%
%    \begin{chartable}
%    |\dudot{U}|   & \dudot{U}    & \uchar{1E72} &
%    |\dudot{u}|   & \dudot{u}    & \uchar{1E73}
%    \end{chartable}
%    \begin{macrocode}
\DeclareTextCommandDefault{\dudot}{\@underaccent\@empty{'177}}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\udot}
%    Dot below (\uchar{0323}): There are two options for implementing
%    this: either map to the standard \cn{d} accent or define using
%    \cs{@underaccent}.  If we choose the former, we have two
%    problems: (a)~when applied to capital letters, the standard
%    \enc{T1} and \enc{OT1} implementations of~|\d| produce
%    \cs{spacefactor}s of~1000 instead of~999, and (b)~the
%    underspacing of the \cs{udot} accent will differ from that of the
%    \cs{dudot} accent:~\udot{x}\dudot{x}.  On the other hand, if we
%    choose the latter, course, \cn{d} and \cn{udot} will
%    differ:~\d{x}\xudot{x}.
%    Neither solution appeals, but it's easier to stick with~\cs{d},
%    so that's what I'll do.
%    \begin{macrocode}
\DeclareTextCommandDefault{\udot}{\d}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\polhk}
%    Ogonek (Polish hook) (\uchar{0328}):
%
%    \begin{chartable}
%    |\polhk{A}| & \polhk{A} & \uchar{0104} &
%    |\polhk{a}| & \polhk{a} & \uchar{0105} \\
%    |\polhk{E}| & \polhk{E} & \uchar{0118} &
%    |\polhk{e}| & \polhk{e} & \uchar{0119} \\
%    |\polhk{I}| & \polhk{I} & \uchar{012E} &
%    |\polhk{i}| & \polhk{i} & \uchar{012F} \\
%    |\polhk{U}| & \polhk{U} & \uchar{0172} &
%    |\polhk{u}| & \polhk{u} & \uchar{0173} \\
%    |\polhk{O}| & \polhk{O} & \uchar{01EA} &
%    |\polhk{o}| & \polhk{o} & \uchar{01EB}
%    \end{chartable}
%
%    The \enc{T1} and \enc{OT4} encodings implement the |\k| accent,
%    so we just use it for most characters, although we will
%    supplement them later with
%    \begin{macrocode}
\DeclareTextCommand{\polhk}{OT4}{\k}
\DeclareTextCommand{\polhk}{T1}{\k}
%    \end{macrocode}
%
%    \begin{macrocode}
\DeclareTextCommand{\polhk}{OT1}[1]{\TextSymbolUnavailable{\k{#1}}#1}
%    \end{macrocode}
%
%    \begin{macrocode}
\DeclareTextCompositeCommand{\polhk}{OT1}{a}{\msc@ogonek {.6}{.07} a}
\DeclareTextCompositeCommand{\polhk}{OT1}{A}{\msc@ogonek {.6}{.07} A}
\DeclareTextCompositeCommand{\polhk}{OT1}{e}{\msc@ogonek   0 {.06} e}
\DeclareTextCompositeCommand{\polhk}{OT1}{E}{\msc@ogonek{.35}{.07} E}
\DeclareTextCompositeCommand{\polhk}{OT1}{i}{\msc@ogonek {.2}{.07} i}
\DeclareTextCompositeCommand{\polhk}{OT1}{I}{\msc@ogonek {.2}{.07} I}
\DeclareTextCompositeCommand{\polhk}{OT1}{u}{\msc@ogonek {.6}{.07} u}
\DeclareTextCompositeCommand{\polhk}{OT1}{U}{\msc@ogonek   0 {.05} U}
\DeclareTextCompositeCommand{\polhk}{OT1}{o}{\msc@ogonek   0 {.07} o}
\DeclareTextCompositeCommand{\polhk}{OT1}{O}{\msc@ogonek   0 {.05} O}
%    \end{macrocode}
%
%    \begin{macrocode}
\DeclareTextCompositeCommand{\polhk}{T1}{i}{\msc@ogonek@a   0  i}
\DeclareTextCompositeCommand{\polhk}{T1}{I}{\msc@ogonek@a   0  I}
\DeclareTextCompositeCommand{\polhk}{T1}{u}{\msc@ogonek@a {.6} u}
\DeclareTextCompositeCommand{\polhk}{T1}{U}{\msc@ogonek@a   0  U}
\DeclareTextCompositeCommand{\polhk}{T1}{o}{\msc@ogonek@a   0  o}
\DeclareTextCompositeCommand{\polhk}{T1}{O}{\msc@ogonek@a   0  O}
%    \end{macrocode}
%
%    \begin{macrocode}
\DeclareTextCompositeCommand{\polhk}{OT4}{i}{\msc@ogonek {.2}{.07} i}
\DeclareTextCompositeCommand{\polhk}{OT4}{I}{\msc@ogonek {.2}{.07} I}
\DeclareTextCompositeCommand{\polhk}{OT4}{u}{\msc@ogonek {.6}{.07} u}
\DeclareTextCompositeCommand{\polhk}{OT4}{U}{\msc@ogonek   0 {.05} U}
\DeclareTextCompositeCommand{\polhk}{OT4}{o}{\msc@ogonek   0 {.07} o}
\DeclareTextCompositeCommand{\polhk}{OT4}{O}{\msc@ogonek   0 {.05} O}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\msc@ogonek}
%    \begin{macrocode}
\def\msc@ogonek#1#2#3{%
    \begingroup
        \setboxz@h{#3\save@sf}%
        \dimen@\wd\z@
        \ooalign{%
            \unhbox\z@\crcr
            \hidewidth
                \setboxz@h{\kern#1\dimen@\supsize$\lhook$}%
                \dimen@\ht\z@
                \advance\dimen@-#2ex\relax
                \lower\dimen@\box\z@
            \hidewidth
        }%
        \restore@sf
    \endgroup
}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\msc@ogonek@a}
%    \begin{macrocode}
\def\msc@ogonek@a#1#2{%
    \begingroup
        \ooalign{%
            #2\save@sf\crcr
            \hidewidth
                \raise0.02ex\hbox{\kern#1ex\char'014}%
            \hidewidth
        }%
        \restore@sf
    \endgroup
}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\soft}
%    Polish `soft' letters T, D, L:
%
%    \begin{chartable}
%    |\soft{T}| & \soft{T} & \uchar{0164} &
%    |\soft{t}| & \soft{t} & \uchar{0165} \\
%    |\soft{D}| & \soft{D} & \uchar{010E} &
%    |\soft{d}| & \soft{d} & \uchar{010f} \\
%    |\soft{L}| & \soft{L} & \uchar{013B} &
%    |\soft{l}| & \soft{l} & \uchar{013C}
%    \end{chartable}
%    \begin{macrocode}
\DeclareTextCommand{\soft}{OT4}{\v}
\DeclareTextCommand{\soft}{T1}{\v}
\DeclareTextCommand{\soft}{OT1}{\v}

\DeclareTextCompositeCommand{\soft}{OT1}{t}{\msc@soft{t}\@ne{.5ex}}
\DeclareTextCompositeCommand{\soft}{OT1}{d}{\msc@soft{d}{.925}{.95ex}}
\DeclareTextCompositeCommand{\soft}{OT1}{l}{\msc@soft{l}{.95}{.4ex}}
\DeclareTextCompositeCommand{\soft}{OT1}{L}{\msc@soft{L}{.975}{.8ex}}

\DeclareTextCompositeCommand{\soft}{OT4}{t}{\msc@soft{t}\@ne{.5ex}}
\DeclareTextCompositeCommand{\soft}{OT4}{d}{\msc@soft{d}{.925}{.95ex}}
\DeclareTextCompositeCommand{\soft}{OT4}{l}{\msc@soft{l}{.95}{.4ex}}
\DeclareTextCompositeCommand{\soft}{OT4}{L}{\msc@soft{L}{.975}{.8ex}}
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\msc@soft}
%    \begin{macrocode}
\def\msc@soft#1#2#3{%
    \leavevmode
    \begingroup
        \setboxz@h{#1}%
        \raise#2\ht\z@\rlap{\kern#3\supsize,}\unhbox\z@
    \endgroup
}
%    \end{macrocode}
%    \end{macro}
%
%    \section*{\raggedright Appendix: Plumbing the depths of
%    underhanging diacritics: Notes on the magic constant 0.2\,ex and
%    an exegesis of certain obscure corners of the \cn{@underaccent}
%    macro}
%
%    \tex/ assumes that a combining accent can be superimposed
%    directly on top of any character whose height is 1\,ex.  If the
%    actual height of the base character differs from 1\,ex, the
%    accent is shifted up or down to maintain the same vertical
%    separation.  Put another way, subtracting 1\,ex from the height
%    of a combining accent tells us how much a character's height is
%    increased when that accent is added.  Call this
%    distance~$\delta$.
%
%    This distance can be analyzed into two pieces: $\delta = \sigma +
%    \eta$, where $\sigma$ is the separation between the top of
%    the base character and the \emph{bottom} of the accent, and
%    $\eta$ is the height of the bounding box of the accent.
%
%    If we now consider moving the accent to the bottom of a
%    character, we have a new relation $\delta' = \sigma' + \eta$,
%    where $\sigma'$ is the distance between the bottom of the base
%    and the \emph{top} of the accent, and $\delta'$ is the amount by
%    which the depth of the base character is increased.
%
%    If the placement of the underhanging version of an accent were
%    strictly symmetrical with the overhanging version, then we would
%    have $\sigma' = \sigma$ and thus $\delta' = \delta$.  However, the
%    placement is not symmetric since for aesthetic reasons we have
%    chosen to set $\sigma' = .2\,\mathrm{ex}$, which seems in general
%    to be a little less than the corresponding~$\sigma$.
%    Unfortunately, this means we can't calculate~$\delta'$ accurately
%    since there is no way to deduce $\eta$ (or, equivalently,
%    $\sigma$) from the font metric information available to us
%    within~\TeX.\footnote{By exploiting symmetries present in some
%    fonts, one can calculate $\eta$ for some of the accents in those
%    fonts, but this doesn't help us much since both $\sigma$
%    and~$\eta$ vary between accents.}
%
%    This leaves us in a bit of a bind, since it means there is no way
%    to calculate the depth accurately.  In despair, I've decided just
%    to pretend that $\delta' = \delta$ for now.
%
%    \subsection*{Finis}
%
%    The usual \cs{endinput} to ensure that random garbage at the end of
%    the file doesn't get copied by \fn{docstrip}.
%    \begin{macrocode}
\endinput
%    \end{macrocode}
%
% \CheckSum{365}
% \Finale