mandoc(1): Update to 1.9.13.
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32c903ac 1.\" $Id: mandoc_char.7,v 1.27 2009/10/17 04:37:52 kristaps Exp $
589e7c1d
SW
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.\"
32c903ac 17.Dd November 11, 2009
589e7c1d
SW
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
28This documents the special characters and predefined strings accepted by
29.Xr mandoc 1
30to format
31.Xr mdoc 7
32and
33.Xr man 7
34documents.
35.
36.Pp
37Both
38.Xr mdoc 7
39and
40.Xr man 7
41encode special characters with
42.Sq \eX
43.Pq for a one-character escape ,
44.Sq \e(XX
45.Pq two-character ,
46and
47.Sq \e[N]
48.Pq N-character .
49One may generalise
50.Sq \e(XX
51as
52.Sq \e[XX]
53and
54.Sq \eX
55as
56.Sq \e[X] .
57Predefined 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 ,
62and
63.Sq \e*[N]
64.Pq N-character .
65One may generalise
66.Sq \e*(XX
67as
68.Sq \e*[XX]
69and
70.Sq \e*X
71as
72.Sq \e*[X] .
73.
74.Pp
75Note that each output mode will have a different rendering of the
76characters. 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
80Formatting documents with ASCII output results in a 7-bit ASCII
81approximation of zero or more characters, for example, the
82.Dq aleph
83character
84.Sq \e(Ah
85will render as
86.Sq N .
87Approximations are a best-effort, and naturally some clarity will be lost.
88.
89.Ss HTML output
90The HTML output mode uses decimal-encoded UTF-8 for sequences, for
91example, the
92.Dq aleph
93character
94.Sq \e(Ah
95will render as
96.Sq &#8501; .
97.
98.
99.Sh SPECIAL CHARACTERS
100These are the preferred input symbols for producing special characters.
101.
102.Pp
103Spacing:
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.El
114.
115.Pp
116Lines:
117.Bl -column -compact -offset indent 10m 10m 10m
118.It Em Input Ta Em Rendered Ta Em Description
119.It \e(ba Ta \(ba Ta bar
120.It \e(br Ta \(br Ta box rule
121.It \e(ul Ta \(ul Ta underscore
122.It \e(rl Ta \(rl Ta overline
123.It \e(bb Ta \(bb Ta broken bar
124.It \e(sl Ta \(sl Ta forward slash
125.It \e(rs Ta \(rs Ta backward slash
126.El
127.
128.Pp
129Text markers:
130.Bl -column -compact -offset indent 10m 10m 10m
131.It Em Input Ta Em Rendered Ta Em Description
132.It \e(ci Ta \(ci Ta circle
133.It \e(bu Ta \(bu Ta bullet
134.It \e(dd Ta \(dd Ta double dagger
135.It \e(dg Ta \(dg Ta dagger
136.It \e(lz Ta \(lz Ta lozenge
137.It \e(sq Ta \(sq Ta white square
138.It \e(ps Ta \(ps Ta paragraph
139.It \e(sc Ta \(sc Ta section
140.It \e(lh Ta \(lh Ta left hand
141.It \e(rh Ta \(rh Ta right hand
142.It \e(at Ta \(at Ta at
143.It \e(sh Ta \(sh Ta hash (pound)
144.It \e(CR Ta \(CR Ta carriage return
145.It \e(OK Ta \(OK Ta check mark
146.El
147.
148.Pp
149Legal symbols:
150.Bl -column -compact -offset indent 10m 10m 10m
151.It Em Input Ta Em Rendered Ta Em Description
152.It \e(co Ta \(co Ta copyright
153.It \e(rg Ta \(rg Ta registered
154.It \e(tm Ta \(tm Ta trademarked
155.El
156.
157.Pp
158Punctuation:
159.Bl -column -compact -offset indent 10m 10m 10m
160.It Em Input Ta Em Rendered Ta Em Description
161.It \e(em Ta \(em Ta em-dash
162.It \e(en Ta \(en Ta en-dash
163.It \e(hy Ta \(hy Ta hyphen
164.It \e\e Ta \\ Ta back-slash
165.It \ee Ta \e Ta back-slash
166.It \e. Ta \. Ta period
167.It \e(r! Ta \(r! Ta upside-down exclamation
168.It \e(r? Ta \(r? Ta upside-down question
169.El
170.
171.Pp
172Quotes:
173.Bl -column -compact -offset indent 10m 10m 10m
174.It Em Input Ta Em Rendered Ta Em Description
175.It \e(Bq Ta \(Bq Ta right low double-quote
176.It \e(bq Ta \(bq Ta right low single-quote
177.It \e(lq Ta \(lq Ta left double-quote
178.It \e(rq Ta \(rq Ta right double-quote
179.It \e(oq Ta \(oq Ta left single-quote
180.It \e(cq Ta \(cq Ta right single-quote
181.It \e(aq Ta \(aq Ta apostrophe quote (text)
182.It \e(dq Ta \(dq Ta double quote (text)
183.It \e(Fo Ta \(Fo Ta left guillemet
184.It \e(Fc Ta \(Fc Ta right guillemet
185.It \e(fo Ta \(fo Ta left single guillemet
186.It \e(fc Ta \(fc Ta right single guillemet
187.El
188.
189.Pp
190Brackets:
191.Bl -column -compact -offset indent 10m 10m 10m
192.It Em Input Ta Em Rendered Ta Em Description
193.It \e(lB Ta \(lB Ta left bracket
194.It \e(rB Ta \(rB Ta right bracket
195.It \e(lC Ta \(lC Ta left brace
196.It \e(rC Ta \(rC Ta right brace
197.It \e(la Ta \(la Ta left angle
198.It \e(ra Ta \(ra Ta right angle
199.It \e(bv Ta \(bv Ta brace extension
200.It \e[braceex] Ta \[braceex] Ta brace extension
201.It \e[bracketlefttp] Ta \[bracketlefttp] Ta top-left hooked bracket
202.It \e[bracketleftbp] Ta \[bracketleftbp] Ta bottom-left hooked bracket
203.It \e[bracketleftex] Ta \[bracketleftex] Ta left hooked bracket extension
204.It \e[bracketrighttp] Ta \[bracketrighttp] Ta top-right hooked bracket
205.It \e[bracketrightbp] Ta \[bracketrightbp] Ta bottom-right hooked bracket
206.It \e[bracketrightex] Ta \[bracketrightex] Ta right hooked bracket extension
207.It \e(lt Ta \(lt Ta top-left hooked brace
208.It \e[bracelefttp] Ta \[bracelefttp] Ta top-left hooked brace
209.It \e(lk Ta \(lk Ta mid-left hooked brace
210.It \e[braceleftmid] Ta \[braceleftmid] Ta mid-left hooked brace
211.It \e(lb Ta \(lb Ta bottom-left hooked brace
212.It \e[braceleftbp] Ta \[braceleftbp] Ta bottom-left hooked brace
213.It \e[braceleftex] Ta \[braceleftex] Ta left hooked brace extension
214.It \e(rt Ta \(rt Ta top-left hooked brace
215.It \e[bracerighttp] Ta \[bracerighttp] Ta top-right hooked brace
216.It \e(rk Ta \(rk Ta mid-right hooked brace
217.It \e[bracerightmid] Ta \[bracerightmid] Ta mid-right hooked brace
218.It \e(rb Ta \(rb Ta bottom-right hooked brace
219.It \e[bracerightbp] Ta \[bracerightbp] Ta bottom-right hooked brace
220.It \e[bracerightex] Ta \[bracerightex] Ta right hooked brace extension
221.It \e[parenlefttp] Ta \[parenlefttp] Ta top-left hooked parenthesis
222.It \e[parenleftbp] Ta \[parenleftbp] Ta bottom-left hooked parenthesis
223.It \e[parenleftex] Ta \[parenleftex] Ta left hooked parenthesis extension
224.It \e[parenrighttp] Ta \[parenrighttp] Ta top-right hooked parenthesis
225.It \e[parenrightbp] Ta \[parenrightbp] Ta bottom-right hooked parenthesis
226.It \e[parenrightex] Ta \[parenrightex] Ta right hooked parenthesis extension
227.El
228.
229.Pp
230Arrows:
231.Bl -column -compact -offset indent 10m 10m 10m
232.It Em Input Ta Em Rendered Ta Em Description
233.It \e(<- Ta \(<- Ta left arrow
234.It \e(-> Ta \(-> Ta right arrow
235.It \e(<> Ta \(<> Ta left-right arrow
236.It \e(da Ta \(da Ta down arrow
237.It \e(ua Ta \(ua Ta up arrow
238.It \e(va Ta \(va Ta up-down arrow
239.It \e(lA Ta \(lA Ta left double-arrow
240.It \e(rA Ta \(rA Ta right double-arrow
241.It \e(hA Ta \(hA Ta left-right double-arrow
242.It \e(uA Ta \(uA Ta up double-arrow
243.It \e(dA Ta \(dA Ta down double-arrow
244.It \e(vA Ta \(vA Ta up-down double-arrow
245.El
246.
247.Pp
248Logical:
249.Bl -column -compact -offset indent 10m 10m 10m
250.It Em Input Ta Em Rendered Ta Em Description
251.It \e(AN Ta \(AN Ta logical and
252.It \e(OR Ta \(OR Ta logical or
253.It \e(no Ta \(no Ta logical not
254.It \e[tno] Ta \[tno] Ta logical not (text)
255.It \e(te Ta \(te Ta existential quantifier
256.It \e(fa Ta \(fa Ta universal quantifier
257.It \e(st Ta \(st Ta such that
258.It \e(tf Ta \(tf Ta therefore
259.It \e(3d Ta \(3d Ta therefore
260.It \e(or Ta \(or Ta bitwise or
261.El
262.
263.Pp
264Mathematical:
265.Bl -column -compact -offset indent 10m 10m 10m
266.It Em Input Ta Em Rendered Ta Em Description
267.It \e(pl Ta \(pl Ta plus
268.It \e(mi Ta \(mi Ta minus
269.It \e- Ta \- Ta minus (text)
270.It \e(-+ Ta \(-+ Ta minus-plus
271.It \e(+- Ta \(+- Ta plus-minus
272.It \e[t+-] Ta \[t+-] Ta plus-minus (text)
273.It \e(pc Ta \(pc Ta centre-dot
274.It \e(mu Ta \(mu Ta multiply
275.It \e[tmu] Ta \[tmu] Ta multiply (text)
276.It \e(c* Ta \(c* Ta circle-multiply
277.It \e(c+ Ta \(c+ Ta circle-plus
278.It \e(di Ta \(di Ta divide
279.It \e[tdi] Ta \[tdi] Ta divide (text)
280.It \e(f/ Ta \(f/ Ta fraction
281.It \e(** Ta \(** Ta asterisk
282.It \e(<= Ta \(<= Ta less-than-equal
283.It \e(>= Ta \(>= Ta greater-than-equal
284.It \e(<< Ta \(<< Ta much less
285.It \e(>> Ta \(>> Ta much greater
286.It \e(eq Ta \(eq Ta equal
287.It \e(!= Ta \(!= Ta not equal
288.It \e(== Ta \(== Ta equivalent
289.It \e(ne Ta \(ne Ta not equivalent
290.It \e(=~ Ta \(=~ Ta congruent
291.It \e(-~ Ta \(-~ Ta asymptotically congruent
292.It \e(ap Ta \(ap Ta asymptotically similar
293.It \e(~~ Ta \(~~ Ta approximately similar
294.It \e(~= Ta \(~= Ta approximately equal
295.It \e(pt Ta \(pt Ta proportionate
296.It \e(es Ta \(es Ta empty set
297.It \e(mo Ta \(mo Ta element
298.It \e(nm Ta \(nm Ta not element
299.It \e(sb Ta \(sb Ta proper subset
300.It \e(nb Ta \(nb Ta not subset
301.It \e(sp Ta \(sp Ta proper superset
302.It \e(nc Ta \(nc Ta not superset
303.It \e(ib Ta \(ib Ta reflexive subset
304.It \e(ip Ta \(ip Ta reflexive superset
305.It \e(ca Ta \(ca Ta intersection
306.It \e(cu Ta \(cu Ta union
307.It \e(/_ Ta \(/_ Ta angle
308.It \e(pp Ta \(pp Ta perpendicular
309.It \e(is Ta \(is Ta integral
310.It \e[integral] Ta \[integral] Ta integral
311.It \e[sum] Ta \[sum] Ta summation
312.It \e[product] Ta \[product] Ta product
313.It \e[coproduct] Ta \[coproduct] Ta coproduct
314.It \e(gr Ta \(gr Ta gradient
315.It \e(sr Ta \(sr Ta square root
316.It \e[sqrt] Ta \[sqrt] Ta square root
317.It \e(lc Ta \(lc Ta left-ceiling
318.It \e(rc Ta \(rc Ta right-ceiling
319.It \e(lf Ta \(lf Ta left-floor
320.It \e(rf Ta \(rf Ta right-floor
321.It \e(if Ta \(if Ta infinity
322.It \e(Ah Ta \(Ah Ta aleph
323.It \e(Im Ta \(Im Ta imaginary
324.It \e(Re Ta \(Re Ta real
325.It \e(pd Ta \(pd Ta partial differential
326.It \e(-h Ta \(-h Ta Planck constant over 2\(*p
327.El
328.
329.Pp
330Ligatures:
331.Bl -column -compact -offset indent 10m 10m 10m
332.It Em Input Ta Em Rendered Ta Em Description
333.It \e(ff Ta \(ff Ta ff ligature
334.It \e(fi Ta \(fi Ta fi ligature
335.It \e(fl Ta \(fl Ta fl ligature
336.It \e(Fi Ta \(Fi Ta ffi ligature
337.It \e(Fl Ta \(Fl Ta ffl ligature
338.It \e(AE Ta \(AE Ta AE
339.It \e(ae Ta \(ae Ta ae
340.It \e(OE Ta \(OE Ta OE
341.It \e(oe Ta \(oe Ta oe
342.It \e(ss Ta \(ss Ta German eszett
343.It \e(IJ Ta \(IJ Ta IJ ligature
344.It \e(ij Ta \(ij Ta ij ligature
345.El
346.
347.Pp
348Accents:
349.Bl -column -compact -offset indent 10m 10m 10m
350.It Em Input Ta Em Rendered Ta Em Description
351.It \e(a" Ta \(a" Ta Hungarian umlaut
352.It \e(a- Ta \(a- Ta macron
353.It \e(a. Ta \(a. Ta dotted
354.It \e(a^ Ta \(a^ Ta circumflex
355.It \e(aa Ta \(aa Ta acute
356.It \e' Ta \' Ta acute
357.It \e(ga Ta \(ga Ta grave
358.It \e` Ta \` Ta grave
359.It \e(ab Ta \(ab Ta breve
360.It \e(ac Ta \(ac Ta cedilla
361.It \e(ad Ta \(ad Ta dieresis
362.It \e(ah Ta \(ah Ta caron
363.It \e(ao Ta \(ao Ta ring
364.It \e(a~ Ta \(a~ Ta tilde
365.It \e(ho Ta \(ho Ta ogonek
366.It \e(ha Ta \(ha Ta hat (text)
367.It \e(ti Ta \(ti Ta tilde (text)
368.El
369.
370.Pp
371Accented letters:
372.Bl -column -compact -offset indent 10m 10m 10m
373.It Em Input Ta Em Rendered Ta Em Description
374.It \e('A Ta \('A Ta acute A
375.It \e('E Ta \('E Ta acute E
376.It \e('I Ta \('I Ta acute I
377.It \e('O Ta \('O Ta acute O
378.It \e('U Ta \('U Ta acute U
379.It \e('a Ta \('a Ta acute a
380.It \e('e Ta \('e Ta acute e
381.It \e('i Ta \('i Ta acute i
382.It \e('o Ta \('o Ta acute o
383.It \e('u Ta \('u Ta acute u
384.It \e(`A Ta \(`A Ta grave A
385.It \e(`E Ta \(`E Ta grave E
386.It \e(`I Ta \(`I Ta grave I
387.It \e(`O Ta \(`O Ta grave O
388.It \e(`U Ta \(`U Ta grave U
389.It \e(`a Ta \(`a Ta grave a
390.It \e(`e Ta \(`e Ta grave e
391.It \e(`i Ta \(`i Ta grave i
392.It \e(`o Ta \(`i Ta grave o
393.It \e(`u Ta \(`u Ta grave u
394.It \e(~A Ta \(~A Ta tilde A
395.It \e(~N Ta \(~N Ta tilde N
396.It \e(~O Ta \(~O Ta tilde O
397.It \e(~a Ta \(~a Ta tilde a
398.It \e(~n Ta \(~n Ta tilde n
399.It \e(~o Ta \(~o Ta tilde o
400.It \e(:A Ta \(:A Ta dieresis A
401.It \e(:E Ta \(:E Ta dieresis E
402.It \e(:I Ta \(:I Ta dieresis I
403.It \e(:O Ta \(:O Ta dieresis O
404.It \e(:U Ta \(:U Ta dieresis U
405.It \e(:a Ta \(:a Ta dieresis a
406.It \e(:e Ta \(:e Ta dieresis e
407.It \e(:i Ta \(:i Ta dieresis i
408.It \e(:o Ta \(:o Ta dieresis o
409.It \e(:u Ta \(:u Ta dieresis u
410.It \e(:y Ta \(:y Ta dieresis y
411.It \e(^A Ta \(^A Ta circumflex A
412.It \e(^E Ta \(^E Ta circumflex E
413.It \e(^I Ta \(^I Ta circumflex I
414.It \e(^O Ta \(^O Ta circumflex O
415.It \e(^U Ta \(^U Ta circumflex U
416.It \e(^a Ta \(^a Ta circumflex a
417.It \e(^e Ta \(^e Ta circumflex e
418.It \e(^i Ta \(^i Ta circumflex i
419.It \e(^o Ta \(^o Ta circumflex o
420.It \e(^u Ta \(^u Ta circumflex u
421.It \e(,C Ta \(,C Ta cedilla C
422.It \e(,c Ta \(,c Ta cedilla c
423.It \e(/L Ta \(/L Ta stroke L
424.It \e(/l Ta \(/l Ta stroke l
425.It \e(/O Ta \(/O Ta stroke O
426.It \e(/o Ta \(/o Ta stroke o
427.It \e(oA Ta \(oA Ta ring A
428.It \e(oa Ta \(oa Ta ring a
429.El
430.
431.Pp
432Special letters:
433.Bl -column -compact -offset indent 10m 10m 10m
434.It Em Input Ta Em Rendered Ta Em Description
435.It \e(-D Ta \(-D Ta Eth
436.It \e(Sd Ta \(Sd Ta eth
437.It \e(TP Ta \(TP Ta Thorn
438.It \e(Tp Ta \(Tp Ta thorn
439.It \e(.i Ta \(.i Ta dotless i
440.It \e(.j Ta \(.j Ta dotless j
441.El
442.
443.Pp
444Currency:
445.Bl -column -compact -offset indent 10m 10m 10m
446.It Em Input Ta Em Rendered Ta Em Description
447.It \e(Do Ta \(Do Ta dollar
448.It \e(ct Ta \(ct Ta cent
449.It \e(Eu Ta \(Eu Ta Euro symbol
450.It \e(eu Ta \(eu Ta Euro symbol
451.It \e(Ye Ta \(Ye Ta yen
452.It \e(Po Ta \(Po Ta pound
453.It \e(Cs Ta \(Cs Ta Scandinavian
454.It \e(Fn Ta \(Fn Ta florin
455.El
456.
457.Pp
458Units:
459.Bl -column -compact -offset indent 10m 10m 10m
460.It Em Input Ta Em Rendered Ta Em Description
461.It \e(de Ta \(de Ta degree
462.It \e(%0 Ta \(%0 Ta per-thousand
463.It \e(fm Ta \(fm Ta minute
464.It \e(sd Ta \(sd Ta second
465.It \e(mc Ta \(mc Ta micro
466.El
467.
468.Pp
469Greek letters:
470.Bl -column -compact -offset indent 10m 10m 10m
471.It Em Input Ta Em Rendered Ta Em Description
472.It \e(*A Ta \(*A Ta Alpha
473.It \e(*B Ta \(*B Ta Beta
474.It \e(*G Ta \(*G Ta Gamma
475.It \e(*D Ta \(*D Ta Delta
476.It \e(*E Ta \(*E Ta Epsilon
477.It \e(*Z Ta \(*Z Ta Zeta
478.It \e(*Y Ta \(*Y Ta Eta
479.It \e(*H Ta \(*H Ta Theta
480.It \e(*I Ta \(*I Ta Iota
481.It \e(*K Ta \(*K Ta Kappa
482.It \e(*L Ta \(*L Ta Lambda
483.It \e(*M Ta \(*M Ta Mu
484.It \e(*N Ta \(*N Ta Nu
485.It \e(*C Ta \(*C Ta Xi
486.It \e(*O Ta \(*O Ta Omicron
487.It \e(*P Ta \(*P Ta Pi
488.It \e(*R Ta \(*R Ta Rho
489.It \e(*S Ta \(*S Ta Sigma
490.It \e(*T Ta \(*T Ta Tau
491.It \e(*U Ta \(*U Ta Upsilon
492.It \e(*F Ta \(*F Ta Phi
493.It \e(*X Ta \(*X Ta Chi
494.It \e(*Q Ta \(*Q Ta Psi
495.It \e(*W Ta \(*W Ta Omega
496.It \e(*a Ta \(*a Ta alpha
497.It \e(*b Ta \(*b Ta beta
498.It \e(*g Ta \(*g Ta gamma
499.It \e(*d Ta \(*d Ta delta
500.It \e(*e Ta \(*e Ta epsilon
501.It \e(*z Ta \(*z Ta zeta
502.It \e(*y Ta \(*y Ta eta
503.It \e(*h Ta \(*h Ta theta
504.It \e(*i Ta \(*i Ta iota
505.It \e(*k Ta \(*k Ta kappa
506.It \e(*l Ta \(*l Ta lambda
507.It \e(*m Ta \(*m Ta mu
508.It \e(*n Ta \(*n Ta nu
509.It \e(*c Ta \(*c Ta xi
510.It \e(*o Ta \(*o Ta omicron
511.It \e(*p Ta \(*p Ta pi
512.It \e(*r Ta \(*r Ta rho
513.It \e(*s Ta \(*s Ta sigma
514.It \e(*t Ta \(*t Ta tau
515.It \e(*u Ta \(*u Ta upsilon
516.It \e(*f Ta \(*f Ta phi
517.It \e(*x Ta \(*x Ta chi
518.It \e(*q Ta \(*q Ta psi
519.It \e(*w Ta \(*w Ta omega
520.It \e(+h Ta \(+h Ta theta variant
521.It \e(+f Ta \(+f Ta phi variant
522.It \e(+p Ta \(+p Ta pi variant
523.It \e(+e Ta \(+e Ta epsilon variant
524.It \e(ts Ta \(ts Ta sigma terminal
525.El
526.
527.
528.Sh PREDEFINED STRINGS
529These are not recommended for use, as they differ across
530implementations:
531.
532.Pp
533.Bl -column -compact -offset indent 10m 10m 10m
534.It Em Input Ta Em Rendered Ta Em Description
535.It \e*(Ba Ta \*(Ba Ta vertical bar
536.It \e*(Ne Ta \*(Ne Ta not equal
537.It \e*(Ge Ta \*(Ge Ta greater-than-equal
538.It \e*(Le Ta \*(Le Ta less-than-equal
539.It \e*(Gt Ta \*(Gt Ta greater-than
540.It \e*(Lt Ta \*(Lt Ta less-than
541.It \e*(Pm Ta \*(Pm Ta plus-minus
542.It \e*(If Ta \*(If Ta infinity
543.It \e*(Pi Ta \*(Pi Ta pi
544.It \e*(Na Ta \*(Na Ta NaN
545.It \e*(Am Ta \*(Am Ta ampersand
546.It \e*R Ta \*R Ta restricted mark
547.It \e*(Tm Ta \*(Tm Ta trade mark
548.It \e*q Ta \*q Ta double-quote
549.It \e*(Rq Ta \*(Rq Ta right-double-quote
550.It \e*(Lq Ta \*(Lq Ta left-double-quote
551.It \e*(lp Ta \*(lp Ta right-parenthesis
552.It \e*(rp Ta \*(rp Ta left-parenthesis
553.It \e*(lq Ta \*(lq Ta left double-quote
554.It \e*(rq Ta \*(rq Ta right double-quote
555.It \e*(ua Ta \*(ua Ta up arrow
556.It \e*(va Ta \*(va Ta up-down arrow
557.It \e*(<= Ta \*(<= Ta less-than-equal
558.It \e*(>= Ta \*(>= Ta greater-than-equal
559.It \e*(aa Ta \*(aa Ta acute
560.It \e*(ga Ta \*(ga Ta grave
561.El
562.
563.
564.Sh COMPATIBILITY
565This section documents compatibility of
566.Nm
567with older or existing versions of
568.Xr groff 1 .
569.
570.Pp
571The following render differently in
572.Fl T Ns Ar ascii
573output mode:
574.Bd -ragged -offset indent
575\e(ss, \e(nm, \e(nb, \e(nc, \e(ib, \e(ip, \e(pp, \e[sum], \e[product],
576\e[coproduct], \e(gr, \e(-h, \e(a.
577.Ed
578.
579.Pp
580The following render differently in
581.Fl T Ns Ar html
582output mode:
583.Bd -ragged -offset indent
584\e(~=, \e(nb, \e(nc
585.Ed
586.
587.Pp
588Finally, the following have been omitted by being poorly documented or
589having no known representation:
590.Bd -ragged -offset indent
591\e[radicalex], \e[sqrtex], \e(ru
592.Ed
593.
594.
595.Sh SEE ALSO
596.Xr mandoc 1
597.
598.
599.Sh STANDARDS
600.Rs
601.%A The Unicode Consortium
602.%T The Unicode Standard: Worldwide Character Encoding, Version 5.2
603.%D 1991
604.Re
605.Rs
606.%A W3C
607.%T HTML 4.01 Specification
608.%D December, 1999
609.Re
610.
611.
612.Sh AUTHORS
613The
614.Nm
615utility was written by
616.An Kristaps Dzonsons Aq kristaps@kth.se .