mandoc_char.7

   1 .\"     $Id: mandoc_char.7,v 1.28 2009/11/12 08:21:05 kristaps Exp $
   2 .\"
   3 .\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se>
   4 .\"
   5 .\" Permission to use, copy, modify, and distribute this software for any
   6 .\" purpose with or without fee is hereby granted, provided that the above
   7 .\" copyright notice and this permission notice appear in all copies.
   8 .\"
   9 .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10 .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11 .\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12 .\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13 .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16 .\"
  17 .Dd $Mdocdate: November 12 2009 $
  18 .Dt MANDOC_CHAR 7
  19 .Os
  20 .
  21 .
  22 .Sh NAME
  23 .Nm mandoc_char
  24 .Nd mandoc special characters
  25 .
  26 .
  27 .Sh DESCRIPTION
  28 This documents the special characters and predefined strings accepted by
  29 .Xr mandoc 1
  30 to format
  31 .Xr mdoc 7
  32 and
  33 .Xr man 7
  34 documents.
  35 .
  36 .Pp
  37 Both
  38 .Xr mdoc 7
  39 and
  40 .Xr man 7
  41 encode special characters with
  42 .Sq \eX
  43 .Pq for a one-character escape ,
  44 .Sq \e(XX
  45 .Pq two-character ,
  46 and
  47 .Sq \e[N]
  48 .Pq N-character .
  49 One may generalise
  50 .Sq \e(XX
  51 as
  52 .Sq \e[XX]
  53 and
  54 .Sq \eX
  55 as
  56 .Sq \e[X] .
  57 Predefined strings are functionally similar to special characters, using
  58 .Sq \e*X
  59 .Pq for a one-character escape ,
  60 .Sq \e*(XX
  61 .Pq two-character ,
  62 and
  63 .Sq \e*[N]
  64 .Pq N-character .
  65 One may generalise
  66 .Sq \e*(XX
  67 as
  68 .Sq \e*[XX]
  69 and
  70 .Sq \e*X
  71 as
  72 .Sq \e*[X] .
  73 .
  74 .Pp
  75 Note that each output mode will have a different rendering of the
  76 characters.  It's guaranteed that each input symbol will correspond to a
  77 (more or less) meaningful output rendering, regardless the mode.
  78 .
  79 .Ss ASCII output
  80 Formatting documents with ASCII output results in a 7-bit ASCII
  81 approximation of zero or more characters, for example, the
  82 .Dq aleph
  83 character
  84 .Sq \e(Ah
  85 will render as
  86 .Sq N .
  87 Approximations are a best-effort, and naturally some clarity will be lost.
  88 .
  89 .Ss HTML output
  90 The HTML output mode uses decimal-encoded UTF-8 for sequences, for
  91 example, the
  92 .Dq aleph
  93 character
  94 .Sq \e(Ah
  95 will render as
  96 .Sq &#8501; .
  97 .
  98 .
  99 .Sh SPECIAL CHARACTERS
 100 These are the preferred input symbols for producing special characters.
 101 .
 102 .Pp
 103 Spacing:
 104 .Bl -column -compact -offset indent 10m 20m
 105 .It Em Input Ta Em Description
 106 .It \e~      Ta non-breaking, non-collapsing space
 107 .It \e       Ta breaking, non-collapsing n-width space
 108 .It \e^      Ta zero-width space
 109 .It \e%      Ta zero-width space
 110 .It \e&      Ta zero-width space
 111 .It \e|      Ta zero-width space
 112 .It \e0      Ta breaking, non-collapsing digit-width space
 113 .It \ec      Ta removes any trailing space (if applicable)
 114 .El
 115 .
 116 .Pp
 117 Lines:
 118 .Bl -column -compact -offset indent 10m 10m 10m
 119 .It Em Input Ta Em Rendered Ta Em Description
 120 .It \e(ba    Ta \(ba        Ta bar
 121 .It \e(br    Ta \(br        Ta box rule
 122 .It \e(ul    Ta \(ul        Ta underscore
 123 .It \e(rl    Ta \(rl        Ta overline
 124 .It \e(bb    Ta \(bb        Ta broken bar
 125 .It \e(sl    Ta \(sl        Ta forward slash
 126 .It \e(rs    Ta \(rs        Ta backward slash
 127 .El
 128 .
 129 .Pp
 130 Text markers:
 131 .Bl -column -compact -offset indent 10m 10m 10m
 132 .It Em Input Ta Em Rendered Ta Em Description
 133 .It \e(ci    Ta \(ci        Ta circle
 134 .It \e(bu    Ta \(bu        Ta bullet
 135 .It \e(dd    Ta \(dd        Ta double dagger
 136 .It \e(dg    Ta \(dg        Ta dagger
 137 .It \e(lz    Ta \(lz        Ta lozenge
 138 .It \e(sq    Ta \(sq        Ta white square
 139 .It \e(ps    Ta \(ps        Ta paragraph
 140 .It \e(sc    Ta \(sc        Ta section
 141 .It \e(lh    Ta \(lh        Ta left hand
 142 .It \e(rh    Ta \(rh        Ta right hand
 143 .It \e(at    Ta \(at        Ta at
 144 .It \e(sh    Ta \(sh        Ta hash (pound)
 145 .It \e(CR    Ta \(CR        Ta carriage return
 146 .It \e(OK    Ta \(OK        Ta check mark
 147 .El
 148 .
 149 .Pp
 150 Legal symbols:
 151 .Bl -column -compact -offset indent 10m 10m 10m
 152 .It Em Input Ta Em Rendered Ta Em Description
 153 .It \e(co    Ta \(co        Ta copyright
 154 .It \e(rg    Ta \(rg        Ta registered
 155 .It \e(tm    Ta \(tm        Ta trademarked
 156 .El
 157 .
 158 .Pp
 159 Punctuation:
 160 .Bl -column -compact -offset indent 10m 10m 10m
 161 .It Em Input Ta Em Rendered Ta Em Description
 162 .It \e(em    Ta \(em        Ta em-dash
 163 .It \e(en    Ta \(en        Ta en-dash
 164 .It \e(hy    Ta \(hy        Ta hyphen
 165 .It \e\e     Ta \\          Ta back-slash
 166 .It \ee      Ta \e          Ta back-slash
 167 .It \e.      Ta \.          Ta period
 168 .It \e(r!    Ta \(r!        Ta upside-down exclamation
 169 .It \e(r?    Ta \(r?        Ta upside-down question
 170 .El
 171 .
 172 .Pp
 173 Quotes:
 174 .Bl -column -compact -offset indent 10m 10m 10m
 175 .It Em Input Ta Em Rendered Ta Em Description
 176 .It \e(Bq    Ta \(Bq        Ta right low double-quote
 177 .It \e(bq    Ta \(bq        Ta right low single-quote
 178 .It \e(lq    Ta \(lq        Ta left double-quote
 179 .It \e(rq    Ta \(rq        Ta right double-quote
 180 .It \e(oq    Ta \(oq        Ta left single-quote
 181 .It \e(cq    Ta \(cq        Ta right single-quote
 182 .It \e(aq    Ta \(aq        Ta apostrophe quote (text)
 183 .It \e(dq    Ta \(dq        Ta double quote (text)
 184 .It \e(Fo    Ta \(Fo        Ta left guillemet
 185 .It \e(Fc    Ta \(Fc        Ta right guillemet
 186 .It \e(fo    Ta \(fo        Ta left single guillemet
 187 .It \e(fc    Ta \(fc        Ta right single guillemet
 188 .El
 189 .
 190 .Pp
 191 Brackets:
 192 .Bl -column -compact -offset indent 10m 10m 10m
 193 .It Em Input Ta Em Rendered Ta Em Description
 194 .It \e(lB    Ta \(lB        Ta left bracket
 195 .It \e(rB    Ta \(rB        Ta right bracket
 196 .It \e(lC    Ta \(lC        Ta left brace
 197 .It \e(rC    Ta \(rC        Ta right brace
 198 .It \e(la    Ta \(la        Ta left angle
 199 .It \e(ra    Ta \(ra        Ta right angle
 200 .It \e(bv    Ta \(bv        Ta brace extension
 201 .It \e[braceex] Ta \[braceex] Ta brace extension
 202 .It \e[bracketlefttp] Ta \[bracketlefttp] Ta top-left hooked bracket
 203 .It \e[bracketleftbp] Ta \[bracketleftbp] Ta bottom-left hooked bracket
 204 .It \e[bracketleftex] Ta \[bracketleftex] Ta left hooked bracket extension
 205 .It \e[bracketrighttp] Ta \[bracketrighttp] Ta top-right hooked bracket
 206 .It \e[bracketrightbp] Ta \[bracketrightbp] Ta bottom-right hooked bracket
 207 .It \e[bracketrightex] Ta \[bracketrightex] Ta right hooked bracket extension
 208 .It \e(lt    Ta \(lt        Ta top-left hooked brace
 209 .It \e[bracelefttp] Ta \[bracelefttp] Ta top-left hooked brace
 210 .It \e(lk    Ta \(lk        Ta mid-left hooked brace
 211 .It \e[braceleftmid] Ta \[braceleftmid] Ta mid-left hooked brace
 212 .It \e(lb    Ta \(lb        Ta bottom-left hooked brace
 213 .It \e[braceleftbp] Ta \[braceleftbp] Ta bottom-left hooked brace
 214 .It \e[braceleftex] Ta \[braceleftex] Ta left hooked brace extension
 215 .It \e(rt    Ta \(rt        Ta top-left hooked brace
 216 .It \e[bracerighttp] Ta \[bracerighttp] Ta top-right hooked brace
 217 .It \e(rk    Ta \(rk        Ta mid-right hooked brace
 218 .It \e[bracerightmid] Ta \[bracerightmid] Ta mid-right hooked brace
 219 .It \e(rb    Ta \(rb        Ta bottom-right hooked brace
 220 .It \e[bracerightbp] Ta \[bracerightbp] Ta bottom-right hooked brace
 221 .It \e[bracerightex] Ta \[bracerightex] Ta right hooked brace extension
 222 .It \e[parenlefttp] Ta \[parenlefttp] Ta top-left hooked parenthesis
 223 .It \e[parenleftbp] Ta \[parenleftbp] Ta bottom-left hooked parenthesis
 224 .It \e[parenleftex] Ta \[parenleftex] Ta left hooked parenthesis extension
 225 .It \e[parenrighttp] Ta \[parenrighttp] Ta top-right hooked parenthesis
 226 .It \e[parenrightbp] Ta \[parenrightbp] Ta bottom-right hooked parenthesis
 227 .It \e[parenrightex] Ta \[parenrightex] Ta right hooked parenthesis extension
 228 .El
 229 .
 230 .Pp
 231 Arrows:
 232 .Bl -column -compact -offset indent 10m 10m 10m
 233 .It Em Input Ta Em Rendered Ta Em Description
 234 .It \e(<-    Ta \(<-        Ta left arrow
 235 .It \e(->    Ta \(->        Ta right arrow
 236 .It \e(<>    Ta \(<>        Ta left-right arrow
 237 .It \e(da    Ta \(da        Ta down arrow
 238 .It \e(ua    Ta \(ua        Ta up arrow
 239 .It \e(va    Ta \(va        Ta up-down arrow
 240 .It \e(lA    Ta \(lA        Ta left double-arrow
 241 .It \e(rA    Ta \(rA        Ta right double-arrow
 242 .It \e(hA    Ta \(hA        Ta left-right double-arrow
 243 .It \e(uA    Ta \(uA        Ta up double-arrow
 244 .It \e(dA    Ta \(dA        Ta down double-arrow
 245 .It \e(vA    Ta \(vA        Ta up-down double-arrow
 246 .El
 247 .
 248 .Pp
 249 Logical:
 250 .Bl -column -compact -offset indent 10m 10m 10m
 251 .It Em Input Ta Em Rendered Ta Em Description
 252 .It \e(AN    Ta \(AN        Ta logical and
 253 .It \e(OR    Ta \(OR        Ta logical or
 254 .It \e(no    Ta \(no        Ta logical not
 255 .It \e[tno]  Ta \[tno]      Ta logical not (text)
 256 .It \e(te    Ta \(te        Ta existential quantifier
 257 .It \e(fa    Ta \(fa        Ta universal quantifier
 258 .It \e(st    Ta \(st        Ta such that
 259 .It \e(tf    Ta \(tf        Ta therefore
 260 .It \e(3d    Ta \(3d        Ta therefore
 261 .It \e(or    Ta \(or        Ta bitwise or
 262 .El
 263 .
 264 .Pp
 265 Mathematical:
 266 .Bl -column -compact -offset indent 10m 10m 10m
 267 .It Em Input Ta Em Rendered Ta Em Description
 268 .It \e(pl    Ta \(pl        Ta plus
 269 .It \e(mi    Ta \(mi        Ta minus
 270 .It \e-      Ta \-          Ta minus (text)
 271 .It \e(-+    Ta \(-+        Ta minus-plus
 272 .It \e(+-    Ta \(+-        Ta plus-minus
 273 .It \e[t+-]  Ta \[t+-]      Ta plus-minus (text)
 274 .It \e(pc    Ta \(pc        Ta centre-dot
 275 .It \e(mu    Ta \(mu        Ta multiply
 276 .It \e[tmu]  Ta \[tmu]      Ta multiply (text)
 277 .It \e(c*    Ta \(c*        Ta circle-multiply
 278 .It \e(c+    Ta \(c+        Ta circle-plus
 279 .It \e(di    Ta \(di        Ta divide
 280 .It \e[tdi]  Ta \[tdi]      Ta divide (text)
 281 .It \e(f/    Ta \(f/        Ta fraction
 282 .It \e(**    Ta \(**        Ta asterisk
 283 .It \e(<=    Ta \(<=        Ta less-than-equal
 284 .It \e(>=    Ta \(>=        Ta greater-than-equal
 285 .It \e(<<    Ta \(<<        Ta much less
 286 .It \e(>>    Ta \(>>        Ta much greater
 287 .It \e(eq    Ta \(eq        Ta equal
 288 .It \e(!=    Ta \(!=        Ta not equal
 289 .It \e(==    Ta \(==        Ta equivalent
 290 .It \e(ne    Ta \(ne        Ta not equivalent
 291 .It \e(=~    Ta \(=~        Ta congruent
 292 .It \e(-~    Ta \(-~        Ta asymptotically congruent
 293 .It \e(ap    Ta \(ap        Ta asymptotically similar
 294 .It \e(~~    Ta \(~~        Ta approximately similar
 295 .It \e(~=    Ta \(~=        Ta approximately equal
 296 .It \e(pt    Ta \(pt        Ta proportionate
 297 .It \e(es    Ta \(es        Ta empty set
 298 .It \e(mo    Ta \(mo        Ta element
 299 .It \e(nm    Ta \(nm        Ta not element
 300 .It \e(sb    Ta \(sb        Ta proper subset
 301 .It \e(nb    Ta \(nb        Ta not subset
 302 .It \e(sp    Ta \(sp        Ta proper superset
 303 .It \e(nc    Ta \(nc        Ta not superset
 304 .It \e(ib    Ta \(ib        Ta reflexive subset
 305 .It \e(ip    Ta \(ip        Ta reflexive superset
 306 .It \e(ca    Ta \(ca        Ta intersection
 307 .It \e(cu    Ta \(cu        Ta union
 308 .It \e(/_    Ta \(/_        Ta angle
 309 .It \e(pp    Ta \(pp        Ta perpendicular
 310 .It \e(is    Ta \(is        Ta integral
 311 .It \e[integral] Ta \[integral] Ta integral
 312 .It \e[sum]    Ta \[sum]   Ta summation
 313 .It \e[product] Ta \[product] Ta product
 314 .It \e[coproduct] Ta \[coproduct] Ta coproduct
 315 .It \e(gr    Ta \(gr        Ta gradient
 316 .It \e(sr    Ta \(sr        Ta square root
 317 .It \e[sqrt] Ta \[sqrt]     Ta square root
 318 .It \e(lc    Ta \(lc        Ta left-ceiling
 319 .It \e(rc    Ta \(rc        Ta right-ceiling
 320 .It \e(lf    Ta \(lf        Ta left-floor
 321 .It \e(rf    Ta \(rf        Ta right-floor
 322 .It \e(if    Ta \(if        Ta infinity
 323 .It \e(Ah    Ta \(Ah        Ta aleph
 324 .It \e(Im    Ta \(Im        Ta imaginary
 325 .It \e(Re    Ta \(Re        Ta real
 326 .It \e(pd    Ta \(pd        Ta partial differential
 327 .It \e(-h    Ta \(-h        Ta Planck constant over 2\(*p
 328 .El
 329 .
 330 .Pp
 331 Ligatures:
 332 .Bl -column -compact -offset indent 10m 10m 10m
 333 .It Em Input Ta Em Rendered Ta Em Description
 334 .It \e(ff    Ta \(ff        Ta ff ligature
 335 .It \e(fi    Ta \(fi        Ta fi ligature
 336 .It \e(fl    Ta \(fl        Ta fl ligature
 337 .It \e(Fi    Ta \(Fi        Ta ffi ligature
 338 .It \e(Fl    Ta \(Fl        Ta ffl ligature
 339 .It \e(AE    Ta \(AE        Ta AE
 340 .It \e(ae    Ta \(ae        Ta ae
 341 .It \e(OE    Ta \(OE        Ta OE
 342 .It \e(oe    Ta \(oe        Ta oe
 343 .It \e(ss    Ta \(ss        Ta German eszett
 344 .It \e(IJ    Ta \(IJ        Ta IJ ligature
 345 .It \e(ij    Ta \(ij        Ta ij ligature
 346 .El
 347 .
 348 .Pp
 349 Accents:
 350 .Bl -column -compact -offset indent 10m 10m 10m
 351 .It Em Input Ta Em Rendered Ta Em Description
 352 .It \e(a"    Ta \(a"        Ta Hungarian umlaut
 353 .It \e(a-    Ta \(a-        Ta macron
 354 .It \e(a.    Ta \(a.        Ta dotted
 355 .It \e(a^    Ta \(a^        Ta circumflex
 356 .It \e(aa    Ta \(aa        Ta acute
 357 .It \e'      Ta \'          Ta acute
 358 .It \e(ga    Ta \(ga        Ta grave
 359 .It \e`      Ta \`          Ta grave
 360 .It \e(ab    Ta \(ab        Ta breve
 361 .It \e(ac    Ta \(ac        Ta cedilla
 362 .It \e(ad    Ta \(ad        Ta dieresis
 363 .It \e(ah    Ta \(ah        Ta caron
 364 .It \e(ao    Ta \(ao        Ta ring
 365 .It \e(a~    Ta \(a~        Ta tilde
 366 .It \e(ho    Ta \(ho        Ta ogonek
 367 .It \e(ha    Ta \(ha        Ta hat (text)
 368 .It \e(ti    Ta \(ti        Ta tilde (text)
 369 .El
 370 .
 371 .Pp
 372 Accented letters:
 373 .Bl -column -compact -offset indent 10m 10m 10m
 374 .It Em Input Ta Em Rendered Ta Em Description
 375 .It \e('A    Ta \('A        Ta acute A
 376 .It \e('E    Ta \('E        Ta acute E
 377 .It \e('I    Ta \('I        Ta acute I
 378 .It \e('O    Ta \('O        Ta acute O
 379 .It \e('U    Ta \('U        Ta acute U
 380 .It \e('a    Ta \('a        Ta acute a
 381 .It \e('e    Ta \('e        Ta acute e
 382 .It \e('i    Ta \('i        Ta acute i
 383 .It \e('o    Ta \('o        Ta acute o
 384 .It \e('u    Ta \('u        Ta acute u
 385 .It \e(`A    Ta \(`A        Ta grave A
 386 .It \e(`E    Ta \(`E        Ta grave E
 387 .It \e(`I    Ta \(`I        Ta grave I
 388 .It \e(`O    Ta \(`O        Ta grave O
 389 .It \e(`U    Ta \(`U        Ta grave U
 390 .It \e(`a    Ta \(`a        Ta grave a
 391 .It \e(`e    Ta \(`e        Ta grave e
 392 .It \e(`i    Ta \(`i        Ta grave i
 393 .It \e(`o    Ta \(`i        Ta grave o
 394 .It \e(`u    Ta \(`u        Ta grave u
 395 .It \e(~A    Ta \(~A        Ta tilde A
 396 .It \e(~N    Ta \(~N        Ta tilde N
 397 .It \e(~O    Ta \(~O        Ta tilde O
 398 .It \e(~a    Ta \(~a        Ta tilde a
 399 .It \e(~n    Ta \(~n        Ta tilde n
 400 .It \e(~o    Ta \(~o        Ta tilde o
 401 .It \e(:A    Ta \(:A        Ta dieresis A
 402 .It \e(:E    Ta \(:E        Ta dieresis E
 403 .It \e(:I    Ta \(:I        Ta dieresis I
 404 .It \e(:O    Ta \(:O        Ta dieresis O
 405 .It \e(:U    Ta \(:U        Ta dieresis U
 406 .It \e(:a    Ta \(:a        Ta dieresis a
 407 .It \e(:e    Ta \(:e        Ta dieresis e
 408 .It \e(:i    Ta \(:i        Ta dieresis i
 409 .It \e(:o    Ta \(:o        Ta dieresis o
 410 .It \e(:u    Ta \(:u        Ta dieresis u
 411 .It \e(:y    Ta \(:y        Ta dieresis y
 412 .It \e(^A    Ta \(^A        Ta circumflex A
 413 .It \e(^E    Ta \(^E        Ta circumflex E
 414 .It \e(^I    Ta \(^I        Ta circumflex I
 415 .It \e(^O    Ta \(^O        Ta circumflex O
 416 .It \e(^U    Ta \(^U        Ta circumflex U
 417 .It \e(^a    Ta \(^a        Ta circumflex a
 418 .It \e(^e    Ta \(^e        Ta circumflex e
 419 .It \e(^i    Ta \(^i        Ta circumflex i
 420 .It \e(^o    Ta \(^o        Ta circumflex o
 421 .It \e(^u    Ta \(^u        Ta circumflex u
 422 .It \e(,C    Ta \(,C        Ta cedilla C
 423 .It \e(,c    Ta \(,c        Ta cedilla c
 424 .It \e(/L    Ta \(/L        Ta stroke L
 425 .It \e(/l    Ta \(/l        Ta stroke l
 426 .It \e(/O    Ta \(/O        Ta stroke O
 427 .It \e(/o    Ta \(/o        Ta stroke o
 428 .It \e(oA    Ta \(oA        Ta ring A
 429 .It \e(oa    Ta \(oa        Ta ring a
 430 .El
 431 .
 432 .Pp
 433 Special letters:
 434 .Bl -column -compact -offset indent 10m 10m 10m
 435 .It Em Input Ta Em Rendered Ta Em Description
 436 .It \e(-D    Ta \(-D        Ta Eth
 437 .It \e(Sd    Ta \(Sd        Ta eth
 438 .It \e(TP    Ta \(TP        Ta Thorn
 439 .It \e(Tp    Ta \(Tp        Ta thorn
 440 .It \e(.i    Ta \(.i        Ta dotless i
 441 .It \e(.j    Ta \(.j        Ta dotless j
 442 .El
 443 .
 444 .Pp
 445 Currency:
 446 .Bl -column -compact -offset indent 10m 10m 10m
 447 .It Em Input Ta Em Rendered Ta Em Description
 448 .It \e(Do    Ta \(Do        Ta dollar
 449 .It \e(ct    Ta \(ct        Ta cent
 450 .It \e(Eu    Ta \(Eu        Ta Euro symbol
 451 .It \e(eu    Ta \(eu        Ta Euro symbol
 452 .It \e(Ye    Ta \(Ye        Ta yen
 453 .It \e(Po    Ta \(Po        Ta pound
 454 .It \e(Cs    Ta \(Cs        Ta Scandinavian
 455 .It \e(Fn    Ta \(Fn        Ta florin
 456 .El
 457 .
 458 .Pp
 459 Units:
 460 .Bl -column -compact -offset indent 10m 10m 10m
 461 .It Em Input Ta Em Rendered Ta Em Description
 462 .It \e(de    Ta \(de        Ta degree
 463 .It \e(%0    Ta \(%0        Ta per-thousand
 464 .It \e(fm    Ta \(fm        Ta minute
 465 .It \e(sd    Ta \(sd        Ta second
 466 .It \e(mc    Ta \(mc        Ta micro
 467 .El
 468 .
 469 .Pp
 470 Greek letters:
 471 .Bl -column -compact -offset indent 10m 10m 10m
 472 .It Em Input Ta Em Rendered Ta Em Description
 473 .It \e(*A    Ta \(*A        Ta Alpha
 474 .It \e(*B    Ta \(*B        Ta Beta
 475 .It \e(*G    Ta \(*G        Ta Gamma
 476 .It \e(*D    Ta \(*D        Ta Delta
 477 .It \e(*E    Ta \(*E        Ta Epsilon
 478 .It \e(*Z    Ta \(*Z        Ta Zeta
 479 .It \e(*Y    Ta \(*Y        Ta Eta
 480 .It \e(*H    Ta \(*H        Ta Theta
 481 .It \e(*I    Ta \(*I        Ta Iota
 482 .It \e(*K    Ta \(*K        Ta Kappa
 483 .It \e(*L    Ta \(*L        Ta Lambda
 484 .It \e(*M    Ta \(*M        Ta Mu
 485 .It \e(*N    Ta \(*N        Ta Nu
 486 .It \e(*C    Ta \(*C        Ta Xi
 487 .It \e(*O    Ta \(*O        Ta Omicron
 488 .It \e(*P    Ta \(*P        Ta Pi
 489 .It \e(*R    Ta \(*R        Ta Rho
 490 .It \e(*S    Ta \(*S        Ta Sigma
 491 .It \e(*T    Ta \(*T        Ta Tau
 492 .It \e(*U    Ta \(*U        Ta Upsilon
 493 .It \e(*F    Ta \(*F        Ta Phi
 494 .It \e(*X    Ta \(*X        Ta Chi
 495 .It \e(*Q    Ta \(*Q        Ta Psi
 496 .It \e(*W    Ta \(*W        Ta Omega
 497 .It \e(*a    Ta \(*a        Ta alpha
 498 .It \e(*b    Ta \(*b        Ta beta
 499 .It \e(*g    Ta \(*g        Ta gamma
 500 .It \e(*d    Ta \(*d        Ta delta
 501 .It \e(*e    Ta \(*e        Ta epsilon
 502 .It \e(*z    Ta \(*z        Ta zeta
 503 .It \e(*y    Ta \(*y        Ta eta
 504 .It \e(*h    Ta \(*h        Ta theta
 505 .It \e(*i    Ta \(*i        Ta iota
 506 .It \e(*k    Ta \(*k        Ta kappa
 507 .It \e(*l    Ta \(*l        Ta lambda
 508 .It \e(*m    Ta \(*m        Ta mu
 509 .It \e(*n    Ta \(*n        Ta nu
 510 .It \e(*c    Ta \(*c        Ta xi
 511 .It \e(*o    Ta \(*o        Ta omicron
 512 .It \e(*p    Ta \(*p        Ta pi
 513 .It \e(*r    Ta \(*r        Ta rho
 514 .It \e(*s    Ta \(*s        Ta sigma
 515 .It \e(*t    Ta \(*t        Ta tau
 516 .It \e(*u    Ta \(*u        Ta upsilon
 517 .It \e(*f    Ta \(*f        Ta phi
 518 .It \e(*x    Ta \(*x        Ta chi
 519 .It \e(*q    Ta \(*q        Ta psi
 520 .It \e(*w    Ta \(*w        Ta omega
 521 .It \e(+h    Ta \(+h        Ta theta variant
 522 .It \e(+f    Ta \(+f        Ta phi variant
 523 .It \e(+p    Ta \(+p        Ta pi variant
 524 .It \e(+e    Ta \(+e        Ta epsilon variant
 525 .It \e(ts    Ta \(ts        Ta sigma terminal
 526 .El
 527 .
 528 .
 529 .Sh PREDEFINED STRINGS
 530 These are not recommended for use, as they differ across
 531 implementations:
 532 .
 533 .Pp
 534 .Bl -column -compact -offset indent 10m 10m 10m
 535 .It Em Input Ta Em Rendered Ta Em Description
 536 .It \e*(Ba   Ta \*(Ba       Ta vertical bar
 537 .It \e*(Ne   Ta \*(Ne       Ta not equal
 538 .It \e*(Ge   Ta \*(Ge       Ta greater-than-equal
 539 .It \e*(Le   Ta \*(Le       Ta less-than-equal
 540 .It \e*(Gt   Ta \*(Gt       Ta greater-than
 541 .It \e*(Lt   Ta \*(Lt       Ta less-than
 542 .It \e*(Pm   Ta \*(Pm       Ta plus-minus
 543 .It \e*(If   Ta \*(If       Ta infinity
 544 .It \e*(Pi   Ta \*(Pi       Ta pi
 545 .It \e*(Na   Ta \*(Na       Ta NaN
 546 .It \e*(Am   Ta \*(Am       Ta ampersand
 547 .It \e*R     Ta \*R         Ta restricted mark
 548 .It \e*(Tm   Ta \*(Tm       Ta trade mark
 549 .It \e*q     Ta \*q         Ta double-quote
 550 .It \e*(Rq   Ta \*(Rq       Ta right-double-quote
 551 .It \e*(Lq   Ta \*(Lq       Ta left-double-quote
 552 .It \e*(lp   Ta \*(lp       Ta right-parenthesis
 553 .It \e*(rp   Ta \*(rp       Ta left-parenthesis
 554 .It \e*(lq   Ta \*(lq       Ta left double-quote
 555 .It \e*(rq   Ta \*(rq       Ta right double-quote
 556 .It \e*(ua   Ta \*(ua       Ta up arrow
 557 .It \e*(va   Ta \*(va       Ta up-down arrow
 558 .It \e*(<=   Ta \*(<=       Ta less-than-equal
 559 .It \e*(>=   Ta \*(>=       Ta greater-than-equal
 560 .It \e*(aa   Ta \*(aa       Ta acute
 561 .It \e*(ga   Ta \*(ga       Ta grave
 562 .El
 563 .
 564 .
 565 .Sh COMPATIBILITY
 566 This section documents compatibility of
 567 .Nm
 568 with older or existing versions of
 569 .Xr groff 1 .
 570 .
 571 .Pp
 572 The following render differently in
 573 .Fl T Ns Ar ascii
 574 output mode:
 575 .Bd -ragged -offset indent
 576 \e(ss, \e(nm, \e(nb, \e(nc, \e(ib, \e(ip, \e(pp, \e[sum], \e[product],
 577 \e[coproduct], \e(gr, \e(-h, \e(a.
 578 .Ed
 579 .
 580 .Pp
 581 The following render differently in
 582 .Fl T Ns Ar html
 583 output mode:
 584 .Bd -ragged -offset indent
 585 \e(~=, \e(nb, \e(nc
 586 .Ed
 587 .
 588 .Pp
 589 Finally, the following have been omitted by being poorly documented or
 590 having no known representation:
 591 .Bd -ragged -offset indent
 592 \e[radicalex], \e[sqrtex], \e(ru
 593 .Ed
 594 .
 595 .
 596 .Sh SEE ALSO
 597 .Xr mandoc 1
 598 .
 599 .
 600 .Sh STANDARDS
 601 .Rs
 602 .%A The Unicode Consortium
 603 .%T The Unicode Standard: Worldwide Character Encoding, Version 5.2
 604 .%D 1991
 605 .Re
 606 .Rs
 607 .%A W3C
 608 .%T HTML 4.01 Specification
 609 .%D December, 1999
 610 .Re
 611 .
 612 .
 613 .Sh AUTHORS
 614 The
 615 .Nm
 616 utility was written by
 617 .An Kristaps Dzonsons Aq kristaps@kth.se .