===================================================================
RCS file: /cvs/mandoc/mandoc_char.7,v
retrieving revision 1.18
retrieving revision 1.49
diff -u -p -r1.18 -r1.49
--- mandoc/mandoc_char.7	2009/09/22 23:34:14	1.18
+++ mandoc/mandoc_char.7	2011/08/30 13:14:01	1.49
@@ -1,6 +1,6 @@
-.\"	$Id: mandoc_char.7,v 1.18 2009/09/22 23:34:14 kristaps Exp $
+.\"	$Id: mandoc_char.7,v 1.49 2011/08/30 13:14:01 kristaps Exp $
 .\"
-.\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se>
+.\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@bsd.lv>
 .\"
 .\" Permission to use, copy, modify, and distribute this software for any
 .\" purpose with or without fee is hereby granted, provided that the above
@@ -13,34 +13,27 @@
 .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-.\" 
-.Dd $Mdocdate: September 22 2009 $
+.\"
+.Dd $Mdocdate: August 30 2011 $
 .Dt MANDOC_CHAR 7
 .Os
-.\" SECTION
 .Sh NAME
 .Nm mandoc_char
 .Nd mandoc special characters
-.\" SECTION
 .Sh DESCRIPTION
-This documents the special characters and predefined strings accepted by 
+This page documents the special characters and predefined strings accepted by
 .Xr mandoc 1
 to format
 .Xr mdoc 7
 and
 .Xr man 7
-documents.  Specific output devices of
-.Xr mandoc 1 ,
-dictated by the
-.Fl T Ns Ar output
-argument, will properly render these sequences.
-.\" PARAGRAPH
+documents.
 .Pp
 Both
 .Xr mdoc 7
 and
 .Xr man 7
-encode special characters with 
+encode special characters with
 .Sq \eX
 .Pq for a one-character escape ,
 .Sq \e(XX
@@ -56,7 +49,7 @@ and
 .Sq \eX
 as
 .Sq \e[X] .
-Predefined strings are functionally similar to special characters, using 
+Predefined strings are functionally similar to special characters, using
 .Sq \e*X
 .Pq for a one-character escape ,
 .Sq \e*(XX
@@ -72,418 +65,544 @@ and
 .Sq \e*X
 as
 .Sq \e*[X] .
-.\" SECTION
-.Sh Special Characters
+.Pp
+Note that each output mode will have a different rendering of the
+characters.
+It's guaranteed that each input symbol will correspond to a
+(more or less) meaningful output rendering, regardless the mode.
+.Sh SPECIAL CHARACTERS
 These are the preferred input symbols for producing special characters.
-.\" PARAGRAPH
 .Pp
-Typographic:
-.Bl -tag -width Ds -offset indent -compact
-.It \e~
-.Pq non-breaking space
-.It \e
-.Pq space
-.It \e^
-.Pq zero-width space
-.It \e%
-.Pq zero-width space
-.It \e&
-.Pq zero-width space
-.It \e|
-.Pq zero-width space
-.It \e0
-.Pq white-space
+Spacing:
+.Bl -column "Input" "Description" -offset indent -compact
+.It Em Input Ta Em Description
+.It \e~      Ta non-breaking, non-collapsing space
+.It \e       Ta breaking, non-collapsing n-width space
+.It \e^      Ta zero-width space
+.It \e%      Ta zero-width space
+.It \e&      Ta zero-width space
+.It \e|      Ta zero-width space
+.It \e0      Ta breaking, non-collapsing digit-width space
+.It \ec      Ta removes any trailing space (if applicable)
 .El
-.\" PARAGRAPH
 .Pp
-Grammatic:
-.Bl -offset indent -column 10n 10n 10n
-.It \e(em      Ta \(em     Ta em-dash
-.It \e(en      Ta \(en     Ta en-dash
-.It \e(hy      Ta \(hy     Ta hyphen
-.It \e\e       Ta \\       Ta back-slash
-.It \\e        Ta \e       Ta back-slash
-.It \e'        Ta \'       Ta apostrophe
-.It \e`        Ta \`       Ta back-tick
-.It \e.        Ta \.       Ta period
-.It \e(r!      Ta \(r!     Ta upside-down exclamation
-.It \e(r?      Ta \(r?     Ta upside-down question
+Lines:
+.Bl -column "Input" "Rendered" "Description" -offset indent -compact
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e(ba    Ta \(ba        Ta bar
+.It \e(br    Ta \(br        Ta box rule
+.It \e(ul    Ta \(ul        Ta underscore
+.It \e(rl    Ta \(rl        Ta overline
+.It \e(bb    Ta \(bb        Ta broken bar
+.It \e(sl    Ta \(sl        Ta forward slash
+.It \e(rs    Ta \(rs        Ta backward slash
 .El
-.\" PARAGRAPH
 .Pp
-Enclosures:
-.Bl -offset indent -column 10n 10n 10n
-.It \e(lh      Ta \(lh     Ta left hand
-.It \e(rh      Ta \(rh     Ta right hand
-.It \e(Fo      Ta \(Fo     Ta left guillemet
-.It \e(Fc      Ta \(Fc     Ta right guillemet
-.It \e(fo      Ta \(fo     Ta left guilsing
-.It \e(fc      Ta \(fc     Ta right guilsing
-.It \e(rC      Ta \(rC     Ta right brace
-.It \e(lC      Ta \(lC     Ta left brace
-.It \e(ra      Ta \(ra     Ta right angle
-.It \e(la      Ta \(la     Ta left angle
-.It \e(rB      Ta \(rB     Ta right bracket
-.It \e(lB      Ta \(lB     Ta left bracket
-.It \e(lq      Ta \(lq     Ta left double-quote
-.It \e(rq      Ta \(rq     Ta right double-quote
-.It \e(oq      Ta \(oq     Ta left single-quote
-.It \e(aq      Ta \(aq     Ta right single-quote
-.It \e(Bq      Ta \(Bq     Ta right low double-quote
-.It \e(bq      Ta \(ba     Ta right low single-quote
+Text markers:
+.Bl -column "Input" "Rendered" "Description" -offset indent -compact
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e(ci    Ta \(ci        Ta circle
+.It \e(bu    Ta \(bu        Ta bullet
+.It \e(dd    Ta \(dd        Ta double dagger
+.It \e(dg    Ta \(dg        Ta dagger
+.It \e(lz    Ta \(lz        Ta lozenge
+.It \e(sq    Ta \(sq        Ta white square
+.It \e(ps    Ta \(ps        Ta paragraph
+.It \e(sc    Ta \(sc        Ta section
+.It \e(lh    Ta \(lh        Ta left hand
+.It \e(rh    Ta \(rh        Ta right hand
+.It \e(at    Ta \(at        Ta at
+.It \e(sh    Ta \(sh        Ta hash (pound)
+.It \e(CR    Ta \(CR        Ta carriage return
+.It \e(OK    Ta \(OK        Ta check mark
 .El
-.\" PARAGRAPH
 .Pp
-Indicatives:
-.Bl -offset indent -column 10n 10n 10n
-.It \e(<-      Ta \(<-     Ta left arrow
-.It \e(->      Ta \(->     Ta right arrow
-.It \e(ua      Ta \(ua     Ta up arrow
-.It \e(da      Ta \(da     Ta down arrow
-.It \e(<>      Ta \(<>     Ta left-right arrow
-.It \e(lA      Ta \(lA     Ta left double-arrow
-.It \e(rA      Ta \(rA     Ta right double-arrow
-.It \e(uA      Ta \(uA     Ta up double-arrow
-.It \e(dA      Ta \(dA     Ta down double-arrow
-.It \e(hA      Ta \(hA     Ta left-right double-arrow
+Legal symbols:
+.Bl -column "Input" "Rendered" "Description" -offset indent -compact
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e(co    Ta \(co        Ta copyright
+.It \e(rg    Ta \(rg        Ta registered
+.It \e(tm    Ta \(tm        Ta trademarked
 .El
-.\" PARAGRAPH
 .Pp
+Punctuation:
+.Bl -column "Input" "Rendered" "Description" -offset indent -compact
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e(em    Ta \(em        Ta em-dash
+.It \e(en    Ta \(en        Ta en-dash
+.It \e(hy    Ta \(hy        Ta hyphen
+.It \ee      Ta \e          Ta back-slash
+.It \e.      Ta \.          Ta period
+.It \e(r!    Ta \(r!        Ta upside-down exclamation
+.It \e(r?    Ta \(r?        Ta upside-down question
+.El
+.Pp
+Quotes:
+.Bl -column "Input" "Rendered" "Description" -offset indent -compact
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e(Bq    Ta \(Bq        Ta right low double-quote
+.It \e(bq    Ta \(bq        Ta right low single-quote
+.It \e(lq    Ta \(lq        Ta left double-quote
+.It \e(rq    Ta \(rq        Ta right double-quote
+.It \e(oq    Ta \(oq        Ta left single-quote
+.It \e(cq    Ta \(cq        Ta right single-quote
+.It \e(aq    Ta \(aq        Ta apostrophe quote (text)
+.It \e(dq    Ta \(dq        Ta double quote (text)
+.It \e(Fo    Ta \(Fo        Ta left guillemet
+.It \e(Fc    Ta \(Fc        Ta right guillemet
+.It \e(fo    Ta \(fo        Ta left single guillemet
+.It \e(fc    Ta \(fc        Ta right single guillemet
+.El
+.Pp
+Brackets:
+.Bl -column "xxbracketrightbpx" Rendered Description -offset indent -compact
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e(lB    Ta \(lB        Ta left bracket
+.It \e(rB    Ta \(rB        Ta right bracket
+.It \e(lC    Ta \(lC        Ta left brace
+.It \e(rC    Ta \(rC        Ta right brace
+.It \e(la    Ta \(la        Ta left angle
+.It \e(ra    Ta \(ra        Ta right angle
+.It \e(bv    Ta \(bv        Ta brace extension
+.It \e[braceex] Ta \[braceex] Ta brace extension
+.It \e[bracketlefttp] Ta \[bracketlefttp] Ta top-left hooked bracket
+.It \e[bracketleftbp] Ta \[bracketleftbp] Ta bottom-left hooked bracket
+.It \e[bracketleftex] Ta \[bracketleftex] Ta left hooked bracket extension
+.It \e[bracketrighttp] Ta \[bracketrighttp] Ta top-right hooked bracket
+.It \e[bracketrightbp] Ta \[bracketrightbp] Ta bottom-right hooked bracket
+.It \e[bracketrightex] Ta \[bracketrightex] Ta right hooked bracket extension
+.It \e(lt    Ta \(lt        Ta top-left hooked brace
+.It \e[bracelefttp] Ta \[bracelefttp] Ta top-left hooked brace
+.It \e(lk    Ta \(lk        Ta mid-left hooked brace
+.It \e[braceleftmid] Ta \[braceleftmid] Ta mid-left hooked brace
+.It \e(lb    Ta \(lb        Ta bottom-left hooked brace
+.It \e[braceleftbp] Ta \[braceleftbp] Ta bottom-left hooked brace
+.It \e[braceleftex] Ta \[braceleftex] Ta left hooked brace extension
+.It \e(rt    Ta \(rt        Ta top-left hooked brace
+.It \e[bracerighttp] Ta \[bracerighttp] Ta top-right hooked brace
+.It \e(rk    Ta \(rk        Ta mid-right hooked brace
+.It \e[bracerightmid] Ta \[bracerightmid] Ta mid-right hooked brace
+.It \e(rb    Ta \(rb        Ta bottom-right hooked brace
+.It \e[bracerightbp] Ta \[bracerightbp] Ta bottom-right hooked brace
+.It \e[bracerightex] Ta \[bracerightex] Ta right hooked brace extension
+.It \e[parenlefttp] Ta \[parenlefttp] Ta top-left hooked parenthesis
+.It \e[parenleftbp] Ta \[parenleftbp] Ta bottom-left hooked parenthesis
+.It \e[parenleftex] Ta \[parenleftex] Ta left hooked parenthesis extension
+.It \e[parenrighttp] Ta \[parenrighttp] Ta top-right hooked parenthesis
+.It \e[parenrightbp] Ta \[parenrightbp] Ta bottom-right hooked parenthesis
+.It \e[parenrightex] Ta \[parenrightex] Ta right hooked parenthesis extension
+.El
+.Pp
+Arrows:
+.Bl -column "Input" "Rendered" "Description" -offset indent -compact
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e(<-    Ta \(<-        Ta left arrow
+.It \e(->    Ta \(->        Ta right arrow
+.It \e(<>    Ta \(<>        Ta left-right arrow
+.It \e(da    Ta \(da        Ta down arrow
+.It \e(ua    Ta \(ua        Ta up arrow
+.It \e(va    Ta \(va        Ta up-down arrow
+.It \e(lA    Ta \(lA        Ta left double-arrow
+.It \e(rA    Ta \(rA        Ta right double-arrow
+.It \e(hA    Ta \(hA        Ta left-right double-arrow
+.It \e(uA    Ta \(uA        Ta up double-arrow
+.It \e(dA    Ta \(dA        Ta down double-arrow
+.It \e(vA    Ta \(vA        Ta up-down double-arrow
+.El
+.Pp
 Logical:
-.Bl -offset indent -column 10n 10n 10n
-.It \e(AN      Ta \(AN     Ta logical and
-.It \e(OR      Ta \(OR     Ta logical or
-.It \e(no      Ta \(no     Ta logical not
-.It \e[tno]    Ta \[tno]   Ta logical not (text)
-.It \e(te      Ta \(te     Ta existential quantifier
-.It \e(fa      Ta \(fa     Ta universal quantifier
-.It \e(st      Ta \(st     Ta such that
-.It \e(tf      Ta \(tf     Ta therefore
-.It \e(3d      Ta \(3d     Ta therefore
-.It \e(or      Ta \(or     Ta bitwise or
+.Bl -column "Input" "Rendered" "Description" -offset indent -compact
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e(AN    Ta \(AN        Ta logical and
+.It \e(OR    Ta \(OR        Ta logical or
+.It \e(no    Ta \(no        Ta logical not
+.It \e[tno]  Ta \[tno]      Ta logical not (text)
+.It \e(te    Ta \(te        Ta existential quantifier
+.It \e(fa    Ta \(fa        Ta universal quantifier
+.It \e(st    Ta \(st        Ta such that
+.It \e(tf    Ta \(tf        Ta therefore
+.It \e(3d    Ta \(3d        Ta therefore
+.It \e(or    Ta \(or        Ta bitwise or
 .El
-.\" PARAGRAPH
 .Pp
 Mathematical:
-.Bl -offset indent -column 10n 10n 10n
-.It \e(pl      Ta \(pl     Ta plus
-.It \e(mi      Ta \(mi     Ta minus
-.It \e-        Ta \-       Ta minus (text)
-.It \e(-+      Ta \(-+     Ta minus-plus
-.It \e(+-      Ta \(+-     Ta plus-minus
-.It \e[t+-]    Ta \[t+-]   Ta plus-minus (text)
-.It \e(pc      Ta \(pc     Ta centre-dot
-.It \e(mu      Ta \(mu     Ta multiply
-.It \e[tmu]    Ta \[tmu]   Ta multiply (text)
-.It \e(c*      Ta \(c*     Ta circle-multiply
-.It \e(c+      Ta \(c+     Ta circle-plus
-.It \e(di      Ta \(di     Ta divide
-.It \e[tdi]    Ta \[tdi]   Ta divide (text)
-.It \e(f/      Ta \(f/     Ta fraction
-.It \e(**      Ta \(**     Ta asterisk
-.It \e(<=      Ta \(<=     Ta less-than-equal
-.It \e(>=      Ta \(>=     Ta greater-than-equal
-.It \e(<<      Ta \(<<     Ta much less
-.It \e(>>      Ta \(>>     Ta much greater
-.It \e(eq      Ta \(eq     Ta equal
-.It \e(!=      Ta \(!=     Ta not equal
-.It \e(==      Ta \(==     Ta equivalent
-.It \e(ne      Ta \(ne     Ta not equivalent
-.It \e(=~      Ta \(=~     Ta congruent
-.It \e(-~      Ta \(-~     Ta asymptotically congruent
-.It \e(ap      Ta \(ap     Ta asymptotically similar
-.It \e(~~      Ta \(~~     Ta approximately similar
-.It \e(~=      Ta \(~=     Ta approximately equal
-.It \e(pt      Ta \(pt     Ta proportionate
-.It \e(es      Ta \(es     Ta empty set
-.It \e(mo      Ta \(mo     Ta element
-.It \e(nm      Ta \(nm     Ta not element
-.It \e(sb      Ta \(sb     Ta proper subset
-.It \e(nb      Ta \(nb     Ta not subset
-.It \e(sp      Ta \(sp     Ta proper superset
-.It \e(nc      Ta \(nc     Ta not superset
-.It \e(ib      Ta \(ib     Ta reflexive subset
-.It \e(ip      Ta \(ip     Ta reflexive superset
-.It \e(ca      Ta \(ca     Ta intersection
-.It \e(cu      Ta \(cu     Ta union
-.It \e(/_      Ta \(/_     Ta angle
-.It \e(pp      Ta \(pp     Ta perpendicular
-.It \e(is      Ta \(is     Ta integral
+.Bl -column "xxcoproductxx" "Rendered" "Description" -offset indent -compact
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e(pl    Ta \(pl        Ta plus
+.It \e(mi    Ta \(mi        Ta minus
+.It \e-      Ta \-          Ta minus (text)
+.It \e(-+    Ta \(-+        Ta minus-plus
+.It \e(+-    Ta \(+-        Ta plus-minus
+.It \e[t+-]  Ta \[t+-]      Ta plus-minus (text)
+.It \e(pc    Ta \(pc        Ta centre-dot
+.It \e(mu    Ta \(mu        Ta multiply
+.It \e[tmu]  Ta \[tmu]      Ta multiply (text)
+.It \e(c*    Ta \(c*        Ta circle-multiply
+.It \e(c+    Ta \(c+        Ta circle-plus
+.It \e(di    Ta \(di        Ta divide
+.It \e[tdi]  Ta \[tdi]      Ta divide (text)
+.It \e(f/    Ta \(f/        Ta fraction
+.It \e(**    Ta \(**        Ta asterisk
+.It \e(<=    Ta \(<=        Ta less-than-equal
+.It \e(>=    Ta \(>=        Ta greater-than-equal
+.It \e(<<    Ta \(<<        Ta much less
+.It \e(>>    Ta \(>>        Ta much greater
+.It \e(eq    Ta \(eq        Ta equal
+.It \e(!=    Ta \(!=        Ta not equal
+.It \e(==    Ta \(==        Ta equivalent
+.It \e(ne    Ta \(ne        Ta not equivalent
+.It \e(=~    Ta \(=~        Ta congruent
+.It \e(-~    Ta \(-~        Ta asymptotically congruent
+.It \e(ap    Ta \(ap        Ta asymptotically similar
+.It \e(~~    Ta \(~~        Ta approximately similar
+.It \e(~=    Ta \(~=        Ta approximately equal
+.It \e(pt    Ta \(pt        Ta proportionate
+.It \e(es    Ta \(es        Ta empty set
+.It \e(mo    Ta \(mo        Ta element
+.It \e(nm    Ta \(nm        Ta not element
+.It \e(sb    Ta \(sb        Ta proper subset
+.It \e(nb    Ta \(nb        Ta not subset
+.It \e(sp    Ta \(sp        Ta proper superset
+.It \e(nc    Ta \(nc        Ta not superset
+.It \e(ib    Ta \(ib        Ta reflexive subset
+.It \e(ip    Ta \(ip        Ta reflexive superset
+.It \e(ca    Ta \(ca        Ta intersection
+.It \e(cu    Ta \(cu        Ta union
+.It \e(/_    Ta \(/_        Ta angle
+.It \e(pp    Ta \(pp        Ta perpendicular
+.It \e(is    Ta \(is        Ta integral
 .It \e[integral] Ta \[integral] Ta integral
 .It \e[sum]    Ta \[sum]   Ta summation
 .It \e[product] Ta \[product] Ta product
 .It \e[coproduct] Ta \[coproduct] Ta coproduct
-.It \e(gr      Ta \(gr     Ta gradient
-.It \e(sr      Ta \(sr     Ta square root
-.It \e[sqrt]   Ta \[sqrt]  Ta square root
-.It \e(lc      Ta \(lc     Ta left-ceiling
-.It \e(rc      Ta \(rc     Ta right-ceiling
-.It \e(lf      Ta \(lf     Ta left-floor
-.It \e(rf      Ta \(rf     Ta right-floor
-.It \e(if      Ta \(if     Ta infinity
-.It \e(Ah      Ta \(Ah     Ta aleph
-.It \e(Im      Ta \(Im     Ta imaginary
-.It \e(Re      Ta \(Re     Ta real
-.It \e(pd      Ta \(pd     Ta partial differential
-.It \e(-h      Ta \(-h     Ta Planck constant over 2\(*p
+.It \e(gr    Ta \(gr        Ta gradient
+.It \e(sr    Ta \(sr        Ta square root
+.It \e[sqrt] Ta \[sqrt]     Ta square root
+.It \e(lc    Ta \(lc        Ta left-ceiling
+.It \e(rc    Ta \(rc        Ta right-ceiling
+.It \e(lf    Ta \(lf        Ta left-floor
+.It \e(rf    Ta \(rf        Ta right-floor
+.It \e(if    Ta \(if        Ta infinity
+.It \e(Ah    Ta \(Ah        Ta aleph
+.It \e(Im    Ta \(Im        Ta imaginary
+.It \e(Re    Ta \(Re        Ta real
+.It \e(pd    Ta \(pd        Ta partial differential
+.It \e(-h    Ta \(-h        Ta Planck constant over 2\(*p
+.It \e[12]   Ta \[12]       Ta one-half
+.It \e[14]   Ta \[14]       Ta one-fourth
+.It \e[34]   Ta \[34]       Ta three-fourths
 .El
-.\" PARAGRAPH
 .Pp
 Ligatures:
-.Bl -offset indent -column 10n 10n 10n
-.It \e(ss      Ta \(ss     Ta German eszett
-.It \e(AE      Ta \(AE     Ta AE
-.It \e(ae      Ta \(ae     Ta ae
-.It \e(OE      Ta \(OE     Ta OE
-.It \e(oe      Ta \(oe     Ta oe
-.It \e(ff      Ta \(ff     Ta ff ligature
-.It \e(fi      Ta \(fi     Ta fi ligature
-.It \e(fl      Ta \(fl     Ta fl ligature
-.It \e(Fi      Ta \(Fi     Ta ffi ligature
-.It \e(Fl      Ta \(Fl     Ta ffl ligature
+.Bl -column "Input" "Rendered" "Description" -offset indent -compact
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e(ff    Ta \(ff        Ta ff ligature
+.It \e(fi    Ta \(fi        Ta fi ligature
+.It \e(fl    Ta \(fl        Ta fl ligature
+.It \e(Fi    Ta \(Fi        Ta ffi ligature
+.It \e(Fl    Ta \(Fl        Ta ffl ligature
+.It \e(AE    Ta \(AE        Ta AE
+.It \e(ae    Ta \(ae        Ta ae
+.It \e(OE    Ta \(OE        Ta OE
+.It \e(oe    Ta \(oe        Ta oe
+.It \e(ss    Ta \(ss        Ta German eszett
+.It \e(IJ    Ta \(IJ        Ta IJ ligature
+.It \e(ij    Ta \(ij        Ta ij ligature
 .El
-.\" PARAGRAPH
 .Pp
 Accents:
-.Bl -offset indent -column 10n 10n 10n
-.It \e(a"      Ta \(a"     Ta Hungarian umlaut
-.It \e(a-      Ta \(a-     Ta macron
-.It \e(a.      Ta \(a.     Ta dotted
-.It \e(a^      Ta \(a^     Ta circumflex
-.It \e(aa      Ta \(aa     Ta acute
-.It \e(ga      Ta \(ga     Ta grave
-.It \e(ab      Ta \(ab     Ta breve
-.It \e(ac      Ta \(ac     Ta cedilla
-.It \e(ad      Ta \(ad     Ta dieresis
-.It \e(ah      Ta \(ah     Ta caron
-.It \e(ao      Ta \(ao     Ta ring
-.It \e(a~      Ta \(a~     Ta tilde
-.It \e(ho      Ta \(ho     Ta ogonek
-.It \e(ha      Ta \(ha     Ta hat (text)
-.It \e(ti      Ta \(ti     Ta tilde (text)
+.Bl -column "Input" "Rendered" "Description" -offset indent -compact
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e(a"    Ta \(a"        Ta Hungarian umlaut
+.It \e(a-    Ta \(a-        Ta macron
+.It \e(a.    Ta \(a.        Ta dotted
+.It \e(a^    Ta \(a^        Ta circumflex
+.It \e(aa    Ta \(aa        Ta acute
+.It \e'      Ta \'          Ta acute
+.It \e(ga    Ta \(ga        Ta grave
+.It \e`      Ta \`          Ta grave
+.It \e(ab    Ta \(ab        Ta breve
+.It \e(ac    Ta \(ac        Ta cedilla
+.It \e(ad    Ta \(ad        Ta dieresis
+.It \e(ah    Ta \(ah        Ta caron
+.It \e(ao    Ta \(ao        Ta ring
+.It \e(a~    Ta \(a~        Ta tilde
+.It \e(ho    Ta \(ho        Ta ogonek
+.It \e(ha    Ta \(ha        Ta hat (text)
+.It \e(ti    Ta \(ti        Ta tilde (text)
 .El
-.\" PARAGRAPH
 .Pp
-Accented characters:
-.Bl -offset indent -column 10n 10n 10n
-.It \e(-D      Ta \(-D     Ta Eth
-.It \e(Sd      Ta \(Sd     Ta eth
-.It \e(TP      Ta \(TP     Ta Thorn
-.It \e(Tp      Ta \(Tp     Ta thorn
-.It \e('A      Ta \('A     Ta acute A
-.It \e('E      Ta \('E     Ta acute E
-.It \e('I      Ta \('I     Ta acute I
-.It \e('O      Ta \('O     Ta acute O
-.It \e('U      Ta \('U     Ta acute U
-.It \e('a      Ta \('a     Ta acute a
-.It \e('e      Ta \('e     Ta acute e
-.It \e('i      Ta \('i     Ta acute i
-.It \e('o      Ta \('o     Ta acute o
-.It \e('u      Ta \('u     Ta acute u
-.It \e(`A      Ta \(`A     Ta grave A
-.It \e(`E      Ta \(`E     Ta grave E
-.It \e(`I      Ta \(`I     Ta grave I
-.It \e(`O      Ta \(`O     Ta grave O
-.It \e(`U      Ta \(`U     Ta grave U
-.It \e(`a      Ta \(`a     Ta grave a
-.It \e(`e      Ta \(`e     Ta grave e
-.It \e(`i      Ta \(`i     Ta grave i
-.It \e(`o      Ta \(`i     Ta grave o
-.It \e(`u      Ta \(`u     Ta grave u
-.It \e(~A      Ta \(~A     Ta tilde A
-.It \e(~N      Ta \(~N     Ta tilde N
-.It \e(~O      Ta \(~O     Ta tilde O
-.It \e(~a      Ta \(~a     Ta tilde a
-.It \e(~n      Ta \(~n     Ta tilde n
-.It \e(~o      Ta \(~o     Ta tilde o
-.It \e(:A      Ta \(:A     Ta dieresis A
-.It \e(:E      Ta \(:E     Ta dieresis E
-.It \e(:I      Ta \(:I     Ta dieresis I
-.It \e(:O      Ta \(:O     Ta dieresis O
-.It \e(:U      Ta \(:U     Ta dieresis U
-.It \e(:a      Ta \(:a     Ta dieresis a
-.It \e(:e      Ta \(:e     Ta dieresis e
-.It \e(:i      Ta \(:i     Ta dieresis i
-.It \e(:o      Ta \(:o     Ta dieresis o
-.It \e(:u      Ta \(:u     Ta dieresis u
-.It \e(:y      Ta \(:y     Ta dieresis y
-.It \e(^A      Ta \(^A     Ta circumflex A
-.It \e(^E      Ta \(^E     Ta circumflex E
-.It \e(^I      Ta \(^I     Ta circumflex I
-.It \e(^O      Ta \(^O     Ta circumflex O
-.It \e(^U      Ta \(^U     Ta circumflex U
-.It \e(^a      Ta \(^a     Ta circumflex a
-.It \e(^e      Ta \(^e     Ta circumflex e
-.It \e(^i      Ta \(^i     Ta circumflex i
-.It \e(^o      Ta \(^o     Ta circumflex o
-.It \e(^u      Ta \(^u     Ta circumflex u
-.It \e(,C      Ta \(,C     Ta cedilla C
-.It \e(,c      Ta \(,c     Ta cedilla c
-.It \e(/L      Ta \(/L     Ta stroke L
-.It \e(/l      Ta \(/l     Ta stroke l
-.It \e(/O      Ta \(/O     Ta stroke O
-.It \e(/o      Ta \(/o     Ta stroke o
-.It \e(oA      Ta \(oA     Ta ring A
-.It \e(oa      Ta \(oa     Ta ring a
+Accented letters:
+.Bl -column "Input" "Rendered" "Description" -offset indent -compact
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e('A    Ta \('A        Ta acute A
+.It \e('E    Ta \('E        Ta acute E
+.It \e('I    Ta \('I        Ta acute I
+.It \e('O    Ta \('O        Ta acute O
+.It \e('U    Ta \('U        Ta acute U
+.It \e('a    Ta \('a        Ta acute a
+.It \e('e    Ta \('e        Ta acute e
+.It \e('i    Ta \('i        Ta acute i
+.It \e('o    Ta \('o        Ta acute o
+.It \e('u    Ta \('u        Ta acute u
+.It \e(`A    Ta \(`A        Ta grave A
+.It \e(`E    Ta \(`E        Ta grave E
+.It \e(`I    Ta \(`I        Ta grave I
+.It \e(`O    Ta \(`O        Ta grave O
+.It \e(`U    Ta \(`U        Ta grave U
+.It \e(`a    Ta \(`a        Ta grave a
+.It \e(`e    Ta \(`e        Ta grave e
+.It \e(`i    Ta \(`i        Ta grave i
+.It \e(`o    Ta \(`i        Ta grave o
+.It \e(`u    Ta \(`u        Ta grave u
+.It \e(~A    Ta \(~A        Ta tilde A
+.It \e(~N    Ta \(~N        Ta tilde N
+.It \e(~O    Ta \(~O        Ta tilde O
+.It \e(~a    Ta \(~a        Ta tilde a
+.It \e(~n    Ta \(~n        Ta tilde n
+.It \e(~o    Ta \(~o        Ta tilde o
+.It \e(:A    Ta \(:A        Ta dieresis A
+.It \e(:E    Ta \(:E        Ta dieresis E
+.It \e(:I    Ta \(:I        Ta dieresis I
+.It \e(:O    Ta \(:O        Ta dieresis O
+.It \e(:U    Ta \(:U        Ta dieresis U
+.It \e(:a    Ta \(:a        Ta dieresis a
+.It \e(:e    Ta \(:e        Ta dieresis e
+.It \e(:i    Ta \(:i        Ta dieresis i
+.It \e(:o    Ta \(:o        Ta dieresis o
+.It \e(:u    Ta \(:u        Ta dieresis u
+.It \e(:y    Ta \(:y        Ta dieresis y
+.It \e(^A    Ta \(^A        Ta circumflex A
+.It \e(^E    Ta \(^E        Ta circumflex E
+.It \e(^I    Ta \(^I        Ta circumflex I
+.It \e(^O    Ta \(^O        Ta circumflex O
+.It \e(^U    Ta \(^U        Ta circumflex U
+.It \e(^a    Ta \(^a        Ta circumflex a
+.It \e(^e    Ta \(^e        Ta circumflex e
+.It \e(^i    Ta \(^i        Ta circumflex i
+.It \e(^o    Ta \(^o        Ta circumflex o
+.It \e(^u    Ta \(^u        Ta circumflex u
+.It \e(,C    Ta \(,C        Ta cedilla C
+.It \e(,c    Ta \(,c        Ta cedilla c
+.It \e(/L    Ta \(/L        Ta stroke L
+.It \e(/l    Ta \(/l        Ta stroke l
+.It \e(/O    Ta \(/O        Ta stroke O
+.It \e(/o    Ta \(/o        Ta stroke o
+.It \e(oA    Ta \(oA        Ta ring A
+.It \e(oa    Ta \(oa        Ta ring a
 .El
-.\" PARAGRAPH
 .Pp
-Monetary:
-.Bl -offset indent -column 10n 10n 10n
-.It \e(Cs      Ta \(Cs     Ta Scandinavian
-.It \e(Do      Ta \(Do     Ta dollar
-.It \e(Po      Ta \(Po     Ta pound
-.It \e(Ye      Ta \(Ye     Ta yen
-.It \e(Fn      Ta \(Fn     Ta florin
-.It \e(ct      Ta \(ct     Ta cent
-.It \e(Eu      Ta \(Eu     Ta Euro character glyph
-.It \e(eu      Ta \(eu     Ta Euro symbol
+Special letters:
+.Bl -column "Input" "Rendered" "Description" -offset indent -compact
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e(-D    Ta \(-D        Ta Eth
+.It \e(Sd    Ta \(Sd        Ta eth
+.It \e(TP    Ta \(TP        Ta Thorn
+.It \e(Tp    Ta \(Tp        Ta thorn
+.It \e(.i    Ta \(.i        Ta dotless i
+.It \e(.j    Ta \(.j        Ta dotless j
 .El
-.\" PARAGRAPH
 .Pp
-Greek letters:
-.Bl -offset indent -column 10n 10n 10n
-.It \e(*A      Ta \(*A     Ta Alpha
-.It \e(*B      Ta \(*B     Ta Beta
-.It \e(*G      Ta \(*G     Ta Gamma
-.It \e(*D      Ta \(*D     Ta Delta
-.It \e(*E      Ta \(*E     Ta Epsilon
-.It \e(*Z      Ta \(*Z     Ta Zeta
-.It \e(*Y      Ta \(*Y     Ta Eta
-.It \e(*H      Ta \(*H     Ta Theta
-.It \e(*I      Ta \(*I     Ta Iota
-.It \e(*K      Ta \(*K     Ta Kappa
-.It \e(*L      Ta \(*L     Ta Lambda
-.It \e(*M      Ta \(*M     Ta Mu
-.It \e(*N      Ta \(*N     Ta Nu
-.It \e(*C      Ta \(*C     Ta Xi
-.It \e(*O      Ta \(*O     Ta Omicron
-.It \e(*P      Ta \(*P     Ta Pi
-.It \e(*R      Ta \(*R     Ta Rho
-.It \e(*S      Ta \(*S     Ta Sigma
-.It \e(*T      Ta \(*T     Ta Tau
-.It \e(*U      Ta \(*U     Ta Upsilon
-.It \e(*F      Ta \(*F     Ta Phi
-.It \e(*X      Ta \(*X     Ta Chi
-.It \e(*Q      Ta \(*Q     Ta Psi
-.It \e(*W      Ta \(*W     Ta Omega
-.It \e(*a      Ta \(*a     Ta alpha
-.It \e(*b      Ta \(*b     Ta beta
-.It \e(*g      Ta \(*g     Ta gamma
-.It \e(*d      Ta \(*d     Ta delta
-.It \e(*e      Ta \(*e     Ta epsilon
-.It \e(*z      Ta \(*z     Ta zeta
-.It \e(*y      Ta \(*y     Ta eta
-.It \e(*h      Ta \(*h     Ta theta
-.It \e(*i      Ta \(*i     Ta iota
-.It \e(*k      Ta \(*k     Ta kappa
-.It \e(*l      Ta \(*l     Ta lambda
-.It \e(*m      Ta \(*m     Ta mu
-.It \e(*n      Ta \(*n     Ta nu
-.It \e(*c      Ta \(*c     Ta xi
-.It \e(*o      Ta \(*o     Ta omicron
-.It \e(*p      Ta \(*p     Ta pi
-.It \e(*r      Ta \(*r     Ta rho
-.It \e(*s      Ta \(*s     Ta sigma
-.It \e(*t      Ta \(*t     Ta tau
-.It \e(*u      Ta \(*u     Ta upsilon
-.It \e(*f      Ta \(*f     Ta phi
-.It \e(*x      Ta \(*x     Ta chi
-.It \e(*q      Ta \(*q     Ta psi
-.It \e(*w      Ta \(*w     Ta omega
-.It \e(+h      Ta \(+h     Ta theta variant
-.It \e(+f      Ta \(+f     Ta phi variant
-.It \e(+p      Ta \(+p     Ta pi variant
-.It \e(+e      Ta \(+e     Ta epsilon variant
-.It \e(ts      Ta \(ts     Ta sigma terminal
+Currency:
+.Bl -column "Input" "Rendered" "Description" -offset indent -compact
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e(Do    Ta \(Do        Ta dollar
+.It \e(ct    Ta \(ct        Ta cent
+.It \e(Eu    Ta \(Eu        Ta Euro symbol
+.It \e(eu    Ta \(eu        Ta Euro symbol
+.It \e(Ye    Ta \(Ye        Ta yen
+.It \e(Po    Ta \(Po        Ta pound
+.It \e(Cs    Ta \(Cs        Ta Scandinavian
+.It \e(Fn    Ta \(Fn        Ta florin
 .El
-.\" PARAGRAPH
 .Pp
-Special symbols:
-.Bl -offset indent -column 10n 10n 10n
-.It \e(de      Ta \(de     Ta degree
-.It \e(ps      Ta \(ps     Ta paragraph
-.It \e(sc      Ta \(sc     Ta section
-.It \e(dg      Ta \(dg     Ta dagger
-.It \e(dd      Ta \(dd     Ta double dagger
-.It \e(ci      Ta \(ci     Ta circle
-.It \e(ba      Ta \(ba     Ta bar
-.It \e(bb      Ta \(bb     Ta broken bar
-.It \e(co      Ta \(co     Ta copyright
-.It \e(rg      Ta \(rg     Ta registered
-.It \e(tm      Ta \(tm     Ta trademarked
-.It \ee        Ta \e       Ta escape
-.El 
-.\" SECTION
-.Sh PREDEFINED STRINGS
-These are not recommended for use, as they differ across
-implementations:
-.Pp
-Mathematical:
-.Bl -offset indent -column 10n 10n 10n
-.It \e*(Ba     Ta \*(Ba    Ta vertical bar
-.It \e*(Ne     Ta \*(Ne    Ta not equal
-.It \e*(Ge     Ta \*(Ge    Ta greater-than-equal
-.It \e*(Le     Ta \*(Le    Ta less-than-equal
-.It \e*(Gt     Ta \*(Gt    Ta greater-than
-.It \e*(Lt     Ta \*(Lt    Ta less-than
-.It \e*(Pm     Ta \*(Pm    Ta plus-minus
-.It \e*(If     Ta \*(If    Ta infinity
-.It \e*(Pi     Ta \*(Pi    Ta pi
-.It \e*(Na     Ta \*(Na    Ta NaN
+Units:
+.Bl -column "Input" "Rendered" "Description" -offset indent -compact
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e(de    Ta \(de        Ta degree
+.It \e(%0    Ta \(%0        Ta per-thousand
+.It \e(fm    Ta \(fm        Ta minute
+.It \e(sd    Ta \(sd        Ta second
+.It \e(mc    Ta \(mc        Ta micro
 .El
-.\" PARAGRAPH
 .Pp
-Special symbols:
-.Bl -offset indent -column 10n 10n 10n
-.It \e*(Ba     Ta \*(Ba    Ta vertical bar
-.It \e*(Am     Ta \*(Am    Ta ampersand
-.It \e*R       Ta \*R      Ta restricted mark
-.It \e*(Tm     Ta \*(Tm    Ta trade mark
+Greek letters:
+.Bl -column "Input" "Rendered" "Description" -offset indent -compact
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e(*A    Ta \(*A        Ta Alpha
+.It \e(*B    Ta \(*B        Ta Beta
+.It \e(*G    Ta \(*G        Ta Gamma
+.It \e(*D    Ta \(*D        Ta Delta
+.It \e(*E    Ta \(*E        Ta Epsilon
+.It \e(*Z    Ta \(*Z        Ta Zeta
+.It \e(*Y    Ta \(*Y        Ta Eta
+.It \e(*H    Ta \(*H        Ta Theta
+.It \e(*I    Ta \(*I        Ta Iota
+.It \e(*K    Ta \(*K        Ta Kappa
+.It \e(*L    Ta \(*L        Ta Lambda
+.It \e(*M    Ta \(*M        Ta Mu
+.It \e(*N    Ta \(*N        Ta Nu
+.It \e(*C    Ta \(*C        Ta Xi
+.It \e(*O    Ta \(*O        Ta Omicron
+.It \e(*P    Ta \(*P        Ta Pi
+.It \e(*R    Ta \(*R        Ta Rho
+.It \e(*S    Ta \(*S        Ta Sigma
+.It \e(*T    Ta \(*T        Ta Tau
+.It \e(*U    Ta \(*U        Ta Upsilon
+.It \e(*F    Ta \(*F        Ta Phi
+.It \e(*X    Ta \(*X        Ta Chi
+.It \e(*Q    Ta \(*Q        Ta Psi
+.It \e(*W    Ta \(*W        Ta Omega
+.It \e(*a    Ta \(*a        Ta alpha
+.It \e(*b    Ta \(*b        Ta beta
+.It \e(*g    Ta \(*g        Ta gamma
+.It \e(*d    Ta \(*d        Ta delta
+.It \e(*e    Ta \(*e        Ta epsilon
+.It \e(*z    Ta \(*z        Ta zeta
+.It \e(*y    Ta \(*y        Ta eta
+.It \e(*h    Ta \(*h        Ta theta
+.It \e(*i    Ta \(*i        Ta iota
+.It \e(*k    Ta \(*k        Ta kappa
+.It \e(*l    Ta \(*l        Ta lambda
+.It \e(*m    Ta \(*m        Ta mu
+.It \e(*n    Ta \(*n        Ta nu
+.It \e(*c    Ta \(*c        Ta xi
+.It \e(*o    Ta \(*o        Ta omicron
+.It \e(*p    Ta \(*p        Ta pi
+.It \e(*r    Ta \(*r        Ta rho
+.It \e(*s    Ta \(*s        Ta sigma
+.It \e(*t    Ta \(*t        Ta tau
+.It \e(*u    Ta \(*u        Ta upsilon
+.It \e(*f    Ta \(*f        Ta phi
+.It \e(*x    Ta \(*x        Ta chi
+.It \e(*q    Ta \(*q        Ta psi
+.It \e(*w    Ta \(*w        Ta omega
+.It \e(+h    Ta \(+h        Ta theta variant
+.It \e(+f    Ta \(+f        Ta phi variant
+.It \e(+p    Ta \(+p        Ta pi variant
+.It \e(+e    Ta \(+e        Ta epsilon variant
+.It \e(ts    Ta \(ts        Ta sigma terminal
 .El
-.\" PARAGRAPH
-.Pp
-Enclosures:
-.Bl -offset indent -column 10n 10n 10n
-.It \e*q       Ta \*q      Ta double-quote
-.It \e*(Rq     Ta \*(Rq    Ta right-double-quote
-.It \e*(Lq     Ta \*(Lq    Ta left-double-quote
-.It \e*(lp     Ta \*(lp    Ta right-parenthesis
-.It \e*(rp     Ta \*(rp    Ta left-parenthesis
+.Sh PREDEFINED STRINGS
+Predefined strings are inherited from the macro packages of historical
+troff implementations.
+They are
+.Em not recommended
+for use, as they differ across implementations.
+Manuals using these predefined strings are almost certainly not
+portable.
+.Bl -column "Input" "Rendered" "Description" -offset indent
+.It Em Input Ta Em Rendered Ta Em Description
+.It \e*(Ba   Ta \*(Ba       Ta vertical bar
+.It \e*(Ne   Ta \*(Ne       Ta not equal
+.It \e*(Ge   Ta \*(Ge       Ta greater-than-equal
+.It \e*(Le   Ta \*(Le       Ta less-than-equal
+.It \e*(Gt   Ta \*(Gt       Ta greater-than
+.It \e*(Lt   Ta \*(Lt       Ta less-than
+.It \e*(Pm   Ta \*(Pm       Ta plus-minus
+.It \e*(If   Ta \*(If       Ta infinity
+.It \e*(Pi   Ta \*(Pi       Ta pi
+.It \e*(Na   Ta \*(Na       Ta NaN
+.It \e*(Am   Ta \*(Am       Ta ampersand
+.It \e*R     Ta \*R         Ta restricted mark
+.It \e*(Tm   Ta \*(Tm       Ta trade mark
+.It \e*q     Ta \*q         Ta double-quote
+.It \e*(Rq   Ta \*(Rq       Ta right-double-quote
+.It \e*(Lq   Ta \*(Lq       Ta left-double-quote
+.It \e*(lp   Ta \*(lp       Ta right-parenthesis
+.It \e*(rp   Ta \*(rp       Ta left-parenthesis
+.It \e*(lq   Ta \*(lq       Ta left double-quote
+.It \e*(rq   Ta \*(rq       Ta right double-quote
+.It \e*(ua   Ta \*(ua       Ta up arrow
+.It \e*(va   Ta \*(va       Ta up-down arrow
+.It \e*(<=   Ta \*(<=       Ta less-than-equal
+.It \e*(>=   Ta \*(>=       Ta greater-than-equal
+.It \e*(aa   Ta \*(aa       Ta acute
+.It \e*(ga   Ta \*(ga       Ta grave
+.It \e*(Px   Ta \*(Px       Ta POSIX standard name
+.It \e*(Ai   Ta \*(Ai       Ta ANSI standard name
 .El
-.\" SECTION
-.Sh COMPATIBILITY
-This section documents compatibility of
-.Nm
-with older or existing versions of
-.Xr groff 1 .
+.Sh UNICODE CHARACTERS
+The escape sequence
 .Pp
-The following render differently in
-.Fl T Ns Ar ascii
-output mode:
-.Bd -ragged -offset indent
-\e(ss, \e(nm, \e(nb, \e(nc, \e(ib, \e(ip, \e(pp, \e[sum], \e[product],
-\e[coproduct], \e(gr, \e(-h, \e(a.
-.Ed
+.Dl \e[uXXXX]
 .Pp
-The following render differently in
-.Fl T Ns Ar html
-output mode:
-.Bd -ragged -offset indent
-\e(~=, \e(nb, \e(nc
-.Ed
+is interpreted as a Unicode codepoint.
+The codepoint must be in the range above U+0080 and less than U+10FFFF.
+For compatibility, points must be zero-padded to four characters; if
+greater than four characters, no zero padding is allowed.
+Unicode surrogates are not allowed.
+.\" .Pp
+.\" Unicode glyphs attenuate to the
+.\" .Sq \&?
+.\" character if invalid or not rendered by current output media.
+.Sh NUMBERED CHARACTERS
+For backward compatibility with existing manuals,
+.Xr mandoc 1
+also supports the
 .Pp
-Finally, the following have been omitted by being poorly documented or
-having no known representation:
-.Bd -ragged -offset indent
-\e[radicalex], \e[sqrtex]
-.Ed
-.\" SECTION
+.Dl \eN\(aq Ns Ar number Ns \(aq
+.Pp
+escape sequence, inserting the character
+.Ar number
+from the current character set into the output.
+Of course, this is inherently non-portable and is already marked
+as deprecated in the Heirloom roff manual.
+For example, do not use \eN'34', use \e(dq, or even the plain
+.Sq \(dq
+character where possible.
+.Sh COMPATIBILITY
+This section documents compatibility between mandoc and other other
+troff implementations, at this time limited to GNU troff
+.Pq Qq groff .
+.Pp
+.Bl -dash -compact
+.It
+The \eN\(aq\(aq escape sequence is limited to printable characters; in
+groff, it accepts arbitrary character numbers.
+.It
+In
+.Fl T Ns Cm ascii ,
+the
+\e(ss, \e(nm, \e(nb, \e(nc, \e(ib, \e(ip, \e(pp, \e[sum], \e[product],
+\e[coproduct], \e(gr, \e(\-h, and \e(a. special characters render
+differently between mandoc and groff.
+.It
+In
+.Fl T Ns Cm html
+and
+.Fl T Ns Cm xhtml ,
+the \e(~=, \e(nb, and \e(nc special characters render differently
+between mandoc and groff.
+.It
+The
+.Fl T Ns Cm ps
+and
+.Fl T Ns Cm pdf
+modes format like
+.Fl T Ns Cm ascii
+instead of rendering glyphs as in groff.
+.It
+The \e[radicalex], \e[sqrtex], and \e(ru special characters have been omitted
+from mandoc either because they are poorly documented or they have no
+known representation.
+.El
 .Sh SEE ALSO
 .Xr mandoc 1
-.\" SECTION
 .Sh AUTHORS
 The
 .Nm
-utility was written by 
-.An Kristaps Dzonsons Aq kristaps@kth.se .
+manual page was written by
+.An Kristaps Dzonsons ,
+.Mt kristaps@bsd.lv .
+.Sh CAVEATS
+The
+.Sq \e*(Ba
+escape mimics the behaviour of the
+.Sq \&|
+character in
+.Xr mdoc 7 ;
+thus, if you wish to render a vertical bar with no side effects, use
+the
+.Sq \e(ba
+escape.