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Diff for /mandoc/mdoc.7 between version 1.38 and 1.56

version 1.38, 2009/07/06 09:21:24 version 1.56, 2009/08/18 14:27:16
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 .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN  .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF  .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"  .\"
 .Dd $Mdocdate$  .Dd $Mdocdate$
 .Dt MDOC 7  .Dt MDOC 7
 .Os  .Os
 .\" SECTION  .
   .
 .Sh NAME  .Sh NAME
 .Nm mdoc  . Nm mdoc
 .Nd mdoc language reference  . Nd mdoc language reference
 .\" SECTION  .
   .
 .Sh DESCRIPTION  .Sh DESCRIPTION
 The  The
 .Nm mdoc  . Nm mdoc
 language is used to format  language is used to format
 .Bx  . Bx
 .Ux  . Ux
 manuals.  In this reference document, we describe the syntax and  manuals.  In this reference document, we describe its syntax, structure,
 structure of the  and usage.  Our reference implementation is
 .Nm  . Xr mandoc 1 .
 language.  Our reference implementation is  
 .Xr mandoc 1 .  
 The  The
 .Sx COMPATIBILITY  . Sx COMPATIBILITY
 section describes compatibility with  section describes compatibility with
 .Xr groff 1 .  . Xr groff 1 .
 .\" PARAGRAPH  . Pp
 .Pp  
 An  An
 .Nm  . Nm
 document follows simple rules:  lines beginning with the control  document follows simple rules:  lines beginning with the control
 character  character
 .Sq \.  . Sq \.
 are parsed for macros.  Other lines are interpreted within the scope of  are parsed for macros.  Other lines are interpreted within the scope of
 prior macros:  prior macros:
 .Bd -literal -offset XXX  . Bd -literal -offset indent
 \&.Sh Macro lines change control state.  \&.Sh Macro lines change control state.
 Other lines are interpreted within the current state.  Other lines are interpreted within the current state.
 .Ed  . Ed
 .\" SECTION  .
 .Sh INPUT ENCODING  .
 .Nm  .Sh LANGUAGE SYNTAX
   . Nm
 documents may contain only graphable 7-bit ASCII characters, the space  documents may contain only graphable 7-bit ASCII characters, the space
 character  character, and, in certain circumstances, the tab character.  All
 .Sq \  ,  manuals must have
 and, in certain circumstances, the tab character  . Ux
 .Sq \et .  line terminators.
 All manuals must have  .
 .Sq \en  .
 line termination.  . Ss Comments
 .Pp  Text following a
 The only time a blank line is acceptable is within  .  Sq \e" ,
 the context of  whether in a macro or free-form text line, is ignored to the end of
 .Sq \&.Bd \-literal  line.  A macro line with only a control character and comment escape,
 or  .  Sq \&.\e" ,
 .Sq \&.Bd \-unfilled .  is also ignored.
 .Pp  .
 Tab characters  .
 .Pq \et  . Ss Reserved Characters
 are only acceptable when delimiting  
 .Sq \&.Bl \-column  
 and in  
 .Sq \&.Bd \-literal  
 or  
 .Sq \&.Bd \-unfilled  
 contexts.  
 .\" SUB-SECTION  
 .Ss Comments  
 Anything following a  
 .Sq \e"  
 delimiter is considered a comment (unless the  
 .Sq \e  
 itself has been escaped) and is ignored to the end of line.  
 Furthermore, a macro line with only a control character  
 .Sq \. ,  
 optionally followed by whitespace, is ignored.  
 .\" SUB-SECTION  
 .Ss Reserved Characters  
 Within a macro line, the following characters are reserved:  Within a macro line, the following characters are reserved:
 .Bl -tag -width Ds -offset XXXX -compact  .  Bl -tag -width Ds -offset indent -compact
 .It \&.  .   It \&.
 .Pq period  .    Pq period
 .It \&,  .   It \&,
 .Pq comma  .    Pq comma
 .It \&:  .   It \&:
 .Pq colon  .    Pq colon
 .It \&;  .   It \&;
 .Pq semicolon  .    Pq semicolon
 .It \&(  .   It \&(
 .Pq left-parenthesis  .    Pq left-parenthesis
 .It \&)  .   It \&)
 .Pq right-parenthesis  .    Pq right-parenthesis
 .It \&[  .   It \&[
 .Pq left-bracket  .    Pq left-bracket
 .It \&]  .   It \&]
 .Pq right-bracket  .    Pq right-bracket
 .It \&?  .   It \&?
 .Pq question  .    Pq question
 .It \&!  .   It \&!
 .Pq exclamation  .    Pq exclamation
 .It \&|  .   It \&|
 .Pq vertical bar  .    Pq vertical bar
 .El  .  El
 .\" PARAGRAPH  .  Pp
 .Pp  
 Use of reserved characters is described in  Use of reserved characters is described in
 .Sx Closure .  .  Sx MACRO SYNTAX .
 For general non-reserved use, characters must either be escaped with a  For general use in macro lines, these characters must either be escaped
 non-breaking space  with a non-breaking space
 .Pq Sq \e&  .  Pq Sq \e&
 or, if applicable, an appropriate escape-sequence used.  or, if applicable, an appropriate escape sequence used.
 .\" SUB-SECTION  .
 .Ss Special Characters  .
 Special character sequences begin with the escape character  . Ss Special Characters
 .Sq \e  Special characters may occur in both macro and free-form lines.
 followed by either an open-parenthesis  Sequences begin with the escape character
 .Sq \&(  .  Sq \e
   followed by either an open-parenthesis
   .  Sq \&(
 for two-character sequences; an open-bracket  for two-character sequences; an open-bracket
 .Sq \&[  .  Sq \&[
 for n-character sequences (terminated at a close-bracket  for n-character sequences (terminated at a close-bracket
 .Sq \&] ) ;  .  Sq \&] ) ;
 or a single one-character sequence.  or a single one-character sequence.  See
 .Pp  .  Xr mandoc_char 7
 Characters may alternatively be escaped by a slash-asterisk,  for a complete list.  Examples include
 .Sq \e* ,  .  Sq \e(em
 with the same combinations as described above.  .  Pq em-dash
 .Pp  and
 Terms may also be text-decorated using the  .  Sq \ee
 .Sq \ef  .  Pq back-slash .
 escape followed by a text-decoration letter: B (bold), I, (italic), or P  .
 and R (Roman, or reset).  This form is not recommended.  .
 .\" SUB-SECTION  . Ss Text Decoration
 .Ss Whitespace  Terms may be text-decorated using the
 Unless in literal mode or specifically escaped, consecutive blocks of  .  Sq \ef
 whitespace are pruned from input.  These are later re-added, if  escape followed by an indicator: B (bold), I, (italic), or P and R
 applicable, by a front-end utility such as  (Roman, or reset).  This form is not recommended for
 .Xr mandoc 1 .  .  Nm ,
 .\" SECTION  which encourages semantic, not presentation, annotation.
 .Sh STRUCTURE  .
   .
   . Ss Predefined Strings
   Historically,
   .  Xr groff 1
   also defined a set of package-specific
   .  Dq predefined strings ,
   which, like
   .  Sx Special Characters ,
   demark special output characters and strings by way of input codes.
   Predefined strings are escaped with the slash-asterisk,
   .  Sq \e* :
   single-character
   .  Sq \e*X ,
   two-character
   .  Sq \e*(XX ,
   and N-character
   .  Sq \e*[N] .
   See
   .  Xr mandoc_char 7
   for a complete list.  Examples include
   .  Sq \e*(Am
   .  Pq ampersand
   and
   .  Sq \e*(Ba
   .  Pq vertical bar .
   .
   .
   . Ss Whitespace
   In non-literal free-form lines, consecutive blocks of whitespace are
   pruned from input and added later in the output filter, if applicable:
   .  Bd -literal -offset indent
   These     spaces   are    pruned       from    input.
   \&.Bd \-literal
   These         are              not.
   \&.Ed
   .  Ed
   .  Pp
   In macro lines, whitespace delimits arguments and is discarded.  If
   arguments are quoted, whitespace within the quotes is retained.
   .  Pp
   Blank lines are only permitted within literal contexts, as are lines
   containing only whitespace.  Tab characters are only acceptable when
   delimiting
   .  Sq \&Bl \-column
   or when in a literal context.
   .
   .
   . Ss Quotation
   Macro arguments may be quoted with a double-quote to group
   space-delimited terms or to retain blocks of whitespace.  A quoted
   argument begins with a double-quote preceded by whitespace.  The next
   double-quote not pair-wise adjacent to another double-quote terminates
   the literal, regardless of surrounding whitespace.
   .  Pp
   This produces tokens
   .  Sq a" ,
   .  Sq b c ,
   .  Sq de ,
   and
   .  Sq fg" .
   Note that any quoted term, be it argument or macro, is indiscriminately
   considered literal text.  Thus, the following produces
   .  Sq \&Em a :
   .  Bd -literal -offset indent
   \&.Em "Em a"
   .  Ed
   .  Pp
   In free-form mode, quotes are regarded as opaque text.
   .
   .
   .Sh MANUAL STRUCTURE
 Each  Each
 .Nm  . Nm
 document must begin with the document prologue, containing, in order,  document must begin with a document prologue, containing, in order,
 .Sq \&.Dd ,  . Sq \&Dd ,
 .Sq \&.Dt ,  . Sq \&Dt ,
 and  and
 .Sq \&.Os .  . Sq \&Os ,
 Following these, the document body must begin with the NAME section  then the NAME section containing at least one
 containing at least one  . Sq \&Nm
 .Sq \&.Nm  followed by
 followed by a  . Sq \&Nd :
 .Sq \&.Nd  . Bd -literal -offset indent
 macro.  \&.Dd $\&Mdocdate$
 .Pp  \&.Dt mdoc 7
 At least one free-form or macro line must follow this prologue.  \&.Os
 .\"  \&.Sh NAME
 .Ss Classification  \&.Nm mdoc
 Macros are classified by their scope rules.  Some macros are allowed to  \&.Nd mdoc language reference
 deviate from their classifications to preserve backward-compatibility  . Ed
 with old macro combinations still found in the manual corpus.  These are  . Pp
 specifically noted on a per-macro basis.  Subsequent SYNOPSIS and DESCRIPTION sections are strongly encouraged,
 .\" SUB-SECTION  but non-compulsory.
 .Ss Scope  .
 .Bl -inset  .
 .\" LIST-ITEM  .Sh MACRO SYNTAX
 .It Em Block  Macros are one to three three characters in length and begin with a
 macros enclose other block macros, in-line macros or text, and  control character ,
 may span multiple lines.  . Sq \&. ,
 .Bl -inset -offset XXXX  at the beginning of the line.  An arbitrary amount of whitespace may
 .\" LIST-ITEM  sit between the control character and the macro name.  Thus,
 .It Em Full-block  . Sq \&.Pp
 macros always span multiple lines.  They consist of zero or  and
 more  . Sq \&.\ \ \ \&Pp
 .Qq heads ,  are equivalent.  Macro names are two or three characters in length.
 subsequent macros or text on the same line following invocation; an  . Pp
 optional  The syntax of a macro depends on its classification.  In this section,
 .Qq body ,  . Sq \-arg
 which spans subsequent lines of text or macros; and an optional  refers to macro arguments, which may be followed by zero or more
 .Qq tail ,  . Sq parm
 macros or text on the same line following closure.  parameters;
 .\" LIST-ITEM  . Sq \&Yo
 .It Em Partial-block  opens the scope of a macro; and if specified,
 macros may span multiple lines.  They consists of a optional  . Sq \&Yc
 .Qq head ,  closes it out.
 text immediately following invocation; always a  . Pp
 .Qq body ,  The
 text or macros following the head on the same and subsequent lines; and  . Em Callable
 optionally a  column indicates that the macro may be called subsequent to the initial
 .Qq tail ,  line-macro.  If a macro is not callable, then its invocation after the
 text immediately following closure.  initial line macro is interpreted as opaque text, such that
 .\" LIST-ITEM  . Sq \&.Fl Sh
 .It Em In-line  produces
 macros may only enclose text and span at most a single line.  . Sq Fl Sh .
 .El  . Pp
 .El  The
 .\" SUB-SECTION  . Em Parsable
 .Ss Closure  column indicates whether the macro may be followed by further
 Closure of a macro's scope depends first on its classification, then  (ostensibly callable) macros.  If a macro is not parsable, subsequent
 on whether it's parsable.  In this table,  macro invocations on the line will be interpreted as opaque text.
 .Sq BFE  . Pp
 refers to block full-explicit and so on.  The
 .\" PARAGRAPH  . Em Scope
 .Pp  column, if applicable, describes closure rules.
 .Bl -tag -width 12n -offset XXXX -compact  .
 .It BPE , BFE  .
 corresponding explicit closure macro  . Ss Block full-explicit
 .It BFI  Multi-line scope closed by an explicit closing macro.  All macros
 end-of-file or a corresponding implicit closure macro  contains bodies; only
 .It BPI  .  Pq Sq \&Bf
 end-of-line (body may be closed by >0 space-separated  contains a head.
 .Sx Reserved Characters ,  .  Bd -literal -offset indent
 although block scope will still be open)  \&.Yo \(lB\-arg \(lBparm...\(rB\(rB \(lBhead...\(rB
 .It INL  \(lBbody...\(rB
 end-of-line  
 .El  
 .\" PARAGRAPH  
 .Pp  
 If a macro (block or in-line) is parsable, it may also be closed out by  
 one of the following scenarios (unless specifically noted otherwise):  
 .\" PARAGRAPH  
 .Pp  
 .Bl -dash -offset XXXX -compact  
 .It  
 a sequence of >0 space-separated  
 .Sx Reserved Characters ,  
 .It  
 another macro,  
 .It  
 end-of-line, or  
 .It  
 completion of a set number of arguments.  
 .El  
 .\" PARAGRAPH  
 .Pp  
 If >0 space-separated  
 .Sx Reserved Characters  
 are followed by non-reserved characters, the behaviour differs per  
 macro.  In general, scope of the macro is closed and re-opened:  
 subsequent tokens are interpreted as if the scope had just been opened.  
 In other circumstances, scope is simply closed out.  
 .\" SECTION  
 .Sh SYNTAX  
 Macros are two or three characters in length.  The syntax of macro  
 invocation depends on its classification.  
 .Qq \-arg  
 refers to the macro arguments (which may contain zero or more values).  
 In these illustrations,  
 .Sq \&.Yo  
 opens the scope of a macro, and if specified,  
 .Sq \&.Yc  
 closes it out (closure may be implicit at end-of-line or end-of-file).  
 .\" PARAGRAPH  
 .Pp  
 Block full-explicit (may contain head, body, tail).  
 .Bd -literal -offset XXXX  
 \&.Yo \(lB\-arg \(lBval...\(rB\(rB \(lBhead...\(rB  
 \(lBbody...\(rB  
 \&.Yc \(lBtail...\(rB  
 .Ed  
 .\" PARAGRAPH  
 .Pp  
 Block full-implicit (may contain zero or more heads, body, no tail).  
 .Bd -literal -offset XXXX  
 \&.Yo \(lB\-arg \(lBval...\(rB\(rB \(lBhead... \(lBTa head...\(rB\(rB  
 \(lBbody...\(rB  
 \&.Yc  \&.Yc
 .Ed  .  Ed
 .\" PARAGRAPH  .  Pp
 .Pp  .  Bl -column -compact -offset indent "MacroX" "CallableX" "ParsableX" "closed by XXX"
 Block partial-explicit (may contain head, multi-line body, tail).  .   It Em Macro Ta Em Callable Ta Em Parsable Ta Em Scope
 .Bd -literal -offset XXXX  .   It \&Bd     Ta    \&No     Ta    \&No     Ta    closed by \&Ed
 \&.Yo \(lB\-arg \(lBval...\(rB\(rB \(lBhead...\(rB  .   It \&Bf     Ta    \&No     Ta    \&No     Ta    closed by \&Ef
 \(lBbody...\(rB  .   It \&Bk     Ta    \&No     Ta    \&No     Ta    closed by \&Ek
 \&.Yc \(lBtail...\(rB  .   It \&Bl     Ta    \&No     Ta    \&No     Ta    closed by \&El
   .   It \&Ed     Ta    \&No     Ta    \&No     Ta    opened by \&Bd
   .   It \&Ef     Ta    \&No     Ta    \&No     Ta    opened by \&Bf
   .   It \&Ek     Ta    \&No     Ta    \&No     Ta    opened by \&Bk
   .   It \&El     Ta    \&No     Ta    \&No     Ta    opened by \&Bl
   .  El
   .
   .
   . Ss Block full-implicit
   Multi-line scope closed by end-of-file or implicitly by another macro.
   All macros have bodies; some
   .  Po
   .   Sq \&It \-bullet ,
   .   Sq \-hyphen ,
   .   Sq \-dash ,
   .   Sq \-enum ,
   .   Sq \-item
   .  Pc
   don't have heads, while
   .  Sq \&It \-column
   may have multiple heads.
   .  Bd -literal -offset indent
   \&.Yo \(lB\-arg \(lBparm...\(rB\(rB \(lBhead... \(lBTa head...\(rB\(rB
   \(lBbody...\(rB
   .  Ed
   .  Pp
   .  Bl -column -compact -offset indent "MacroX" "CallableX" "ParsableX" "closed by XXXXXXXXXXX"
   .   It Em Macro Ta Em Callable Ta Em Parsable Ta Em Scope
   .   It \&It     Ta    \&No     Ta    Yes      Ta    closed by \&It, \&El
   .   It \&Nd     Ta    \&No     Ta    \&No     Ta    closed by \&Sh
   .   It \&Sh     Ta    \&No     Ta    \&No     Ta    closed by \&Sh
   .   It \&Ss     Ta    \&No     Ta    \&No     Ta    closed by \&Sh, \&Ss
   .  El
   .
   .
   . Ss Block partial-explicit
   Like block full-explicit, but also with single-line scope.  Each
   has at least a body and, in limited circumstances, a head
   .  Pq So \&Fo Sc , So \&Eo Sc
   and/or tail
   .  Pq So \&Ec Sc .
   .  Bd -literal -offset indent
   \&.Yo \(lB\-arg \(lBparm...\(rB\(rB \(lBhead...\(rB
   \(lBbody...\(rB
   \&.Yc \(lBtail...\(rB
   
 \&.Yo \(lB\-arg \(lBval...\(rB\(rB \(lBhead...\(rB \  \&.Yo \(lB\-arg \(lBparm...\(rB\(rB \(lBhead...\(rB \
 \(lBbody...\(rB \&Yc \(lBtail...\(rB  \(lBbody...\(rB \&Yc \(lBtail...\(rB
 .Ed  .  Ed
 .\" PARAGRAPH  .  Pp
 .Pp  .  Bl -column "MacroX" "CallableX" "ParsableX" "closed by XXXX" -compact -offset indent
 Block partial-implicit (no head, body, no tail).  Note that the body  .   It Em Macro Ta Em Callable Ta Em Parsable Ta Em Scope
 section may be followed by zero or more  .   It \&Ac     Ta    Yes      Ta    Yes      Ta    opened by \&Ao
 .Sx Reserved Words .  .   It \&Ao     Ta    Yes      Ta    Yes      Ta    closed by \&Ac
 These are in the block scope, but not in the body scope.  .   It \&Bc     Ta    Yes      Ta    Yes      Ta    closed by \&Bo
 .Bd -literal -offset XXXX  .   It \&Bo     Ta    Yes      Ta    Yes      Ta    opened by \&Bc
 \&.Yo \(lB\-arg \(lBval...\(rB\(rB \(lBbody...\(rB \(lBreserved...\(rB  .   It \&Brc    Ta    Yes      Ta    Yes      Ta    opened by \&Bro
 .Ed  .   It \&Bro    Ta    Yes      Ta    Yes      Ta    closed by \&Brc
 .\" PARAGRAPH  .   It \&Dc     Ta    Yes      Ta    Yes      Ta    opened by \&Do
 .Pp  .   It \&Do     Ta    Yes      Ta    Yes      Ta    closed by \&Dc
 In-lines have \(>=0 scoped arguments.  .   It \&Ec     Ta    Yes      Ta    Yes      Ta    opened by \&Eo
 .Bd -literal -offset XXX  .   It \&Eo     Ta    Yes      Ta    Yes      Ta    closed by \&Ec
 \&.Yy \(lB\-arg \(lBval...\(rB\(rB \(lBargs...\(rB  .   It \&Fc     Ta    Yes      Ta    Yes      Ta    opened by \&Fo
   .   It \&Fo     Ta    \&No     Ta    \&No     Ta    closed by \&Fc
 \&.Yy \(lB\-arg \(lBval...\(rB\(rB arg0 arg1 argN  .   It \&Oc     Ta    Yes      Ta    Yes      Ta    closed by \&Oo
 .Ed  .   It \&Oo     Ta    Yes      Ta    Yes      Ta    opened by \&Oc
 .\" SECTION  .   It \&Pc     Ta    Yes      Ta    Yes      Ta    closed by \&Po
 .Sh MACROS  .   It \&Po     Ta    Yes      Ta    Yes      Ta    opened by \&Pc
 This section contains a complete list of all  .   It \&Qc     Ta    Yes      Ta    Yes      Ta    opened by \&Oo
 .Nm  .   It \&Qo     Ta    Yes      Ta    Yes      Ta    closed by \&Oc
 macros, arranged by classification.  A  .   It \&Re     Ta    \&No     Ta    \&No     Ta    opened by \&Rs
 .Qq callable  .   It \&Rs     Ta    \&No     Ta    \&No     Ta    closed by \&Re
 macro is invoked subsequent to the initial macro-line macro.  A  .   It \&Sc     Ta    Yes      Ta    Yes      Ta    opened by \&So
 .Qq parsable  .   It \&So     Ta    Yes      Ta    Yes      Ta    closed by \&Sc
 macro may be followed by further (ostensibly callable) macros.  .   It \&Xc     Ta    Yes      Ta    Yes      Ta    opened by \&Xo
 .\" SUB-SECTION  .   It \&Xo     Ta    Yes      Ta    Yes      Ta    closed by \&Xc
 .Ss Block full-implicit  .  El
 The head of these macros follows invocation; the body is the content of  .
 subsequent lines prior to closure.  None of these macros have tails;  .
 some  . Ss Block partial-implicit
 .Po  Like block full-implicit, but with single-line scope closed by
 .Sq \&.It \-bullet ,  .  Sx Reserved Characters
 .Sq \-hyphen ,  or end of line.
 .Sq \-dash ,  .  Bd -literal -offset indent
 .Sq \-enum ,  \&.Yo \(lB\-arg \(lBval...\(rB\(rB \(lBbody...\(rB \(lBres...\(rB
 .Sq \-item  .  Ed
 .Pc  .  Pp
 don't have heads.  .  Bl -column "MacroX" "CallableX" "ParsableX" -compact -offset indent
 .Pp  .   It Em Macro Ta Em Callable Ta Em Parsable
 .Bl -column -compact -offset XXXX "MacroX" "CallableX" "ParsableX" "Closing"  .   It \&Aq     Ta    Yes      Ta    Yes
 .It Em Macro Ta Em Callable Ta Em Parsable Ta Em Closing  .   It \&Bq     Ta    Yes      Ta    Yes
 .It \&.Sh    Ta    \&No    Ta    \&No    Ta    \&.Sh  .   It \&Brq    Ta    Yes      Ta    Yes
 .It \&.Ss    Ta    \&No    Ta    \&No    Ta    \&.Sh, \&.Ss  .   It \&D1     Ta    \&No     Ta    \&Yes
 .It \&.It    Ta    \&No    Ta    Yes     Ta    \&.It, \&.El  .   It \&Dl     Ta    \&No     Ta    Yes
 .El  .   It \&Dq     Ta    Yes      Ta    Yes
 .\" SUB-SECTION  .   It \&Op     Ta    Yes      Ta    Yes
 .Ss Block full-explicit  .   It \&Pq     Ta    Yes      Ta    Yes
 None of these macros are callable or parsed.  The last column indicates  .   It \&Ql     Ta    Yes      Ta    Yes
 the explicit scope rules.  All contains bodies, some may contain heads  .   It \&Qq     Ta    Yes      Ta    Yes
 .Pq So \&Bf Sc .  .   It \&Sq     Ta    Yes      Ta    Yes
 .Pp  .  El
 .Bl -column -compact -offset XXXX "MacroX" "CallableX" "ParsableX" "closed by XXX"  .
 .It Em Macro Ta Em Callable Ta Em Parsable Ta Em Scope  .
 .It \&.Bd    Ta    \&No    Ta    \&No    Ta    closed by \&.Ed  . Ss In-line
 .It \&.Ed    Ta    \&No    Ta    \&No    Ta    opened by \&.Bd  Closed by
 .It \&.Bl    Ta    \&No    Ta    \&No    Ta    closed by \&.El  .  Sx Reserved Characters ,
 .It \&.El    Ta    \&No    Ta    \&No    Ta    opened by \&.Bl  end of line, fixed argument lengths, and/or subsequent macros.  In-line
 .It \&.Bf    Ta    \&No    Ta    \&No    Ta    closed by \&.Ef  macros have only text children.  If a number (or inequality) of
 .It \&.Ef    Ta    \&No    Ta    \&No    Ta    opened by \&.Bf  
 .It \&.Bk    Ta    \&No    Ta    \&No    Ta    closed by \&.Ek  
 .It \&.Ek    Ta    \&No    Ta    \&No    Ta    opened by \&.Bk  
 .El  
 .\" SUB-SECTION  
 .Ss Block partial-implicit  
 All of these are callable and parsed for further macros.  Their scopes  
 close at the invocation's end-of-line.  
 .Pp  
 .Bl -column "MacroX" "CallableX" "ParsableX" -compact -offset XXXX  
 .It Em Macro Ta Em Callable Ta Em Parsable  
 .It \&.Aq    Ta    Yes   Ta    Yes  
 .It \&.Op    Ta    Yes   Ta    Yes  
 .It \&.Bq    Ta    Yes   Ta    Yes  
 .It \&.Dq    Ta    Yes   Ta    Yes  
 .It \&.Pq    Ta    Yes   Ta    Yes  
 .It \&.Qq    Ta    Yes   Ta    Yes  
 .It \&.Sq    Ta    Yes   Ta    Yes  
 .It \&.Brq   Ta    Yes   Ta    Yes  
 .It \&.D1    Ta    \&No  Ta    \&Yes  
 .It \&.Dl    Ta    \&No  Ta    Yes  
 .It \&.Ql    Ta    Yes   Ta    Yes  
 .El  
 .\" PARAGRAPH  
 .Pp  
 The  
 .Sq \&.Op  
 may be broken by  
 .Sq \&.Oc  
 as in the following example:  
 .Bd -literal -offset XXXX  
 \&.Oo  
 \&.Op Fl a Oc  
 .Ed  
 .Pp  
 In the above example, the scope of  
 .Sq \&.Op  
 is technically broken by  
 .Sq \&.Oc ,  
 however, due to the overwhelming existence of this sequence, it's  
 allowed.  
 .\" SUB-SECTION  
 .Ss Block partial-explicit  
 Each of these contains at least a body and, in limited circumstances, a  
 head  
 .Pq So \&.Fo Sc , So \&.Eo Sc  
 and/or tail  
 .Pq So \&.Ec Sc .  
 .Pp  
 .Bl -column "MacroX" "CallableX" "ParsableX" "closed by XXXX" -compact -offset XXXX  
 .It Em Macro Ta Em Callable Ta Em Parsable Ta Em Scope  
 .It \&.Ao    Ta    Yes   Ta    Yes    Ta    closed by \&.Ac  
 .It \&.Ac    Ta    Yes   Ta    Yes    Ta    opened by \&.Ao  
 .It \&.Bc    Ta    Yes   Ta    Yes    Ta    closed by \&.Bo  
 .It \&.Bo    Ta    Yes   Ta    Yes    Ta    opened by \&.Bc  
 .It \&.Pc    Ta    Yes   Ta    Yes    Ta    closed by \&.Po  
 .It \&.Po    Ta    Yes   Ta    Yes    Ta    opened by \&.Pc  
 .It \&.Do    Ta    Yes   Ta    Yes    Ta    closed by \&.Dc  
 .It \&.Dc    Ta    Yes   Ta    Yes    Ta    opened by \&.Do  
 .It \&.Xo    Ta    Yes   Ta    Yes    Ta    closed by \&.Xc  
 .It \&.Xc    Ta    Yes   Ta    Yes    Ta    opened by \&.Xo  
 .It \&.Bro   Ta    Yes   Ta    Yes    Ta    closed by \&.Brc  
 .It \&.Brc   Ta    Yes   Ta    Yes    Ta    opened by \&.Bro  
 .It \&.Oc    Ta    Yes   Ta    Yes    Ta    closed by \&.Oo  
 .It \&.Oo    Ta    Yes   Ta    Yes    Ta    opened by \&.Oc  
 .It \&.So    Ta    Yes   Ta    Yes    Ta    closed by \&.Sc  
 .It \&.Sc    Ta    Yes   Ta    Yes    Ta    opened by \&.So  
 .It \&.Fc    Ta    Yes   Ta    Yes    Ta    opened by \&.Fo  
 .It \&.Fo    Ta    \&No  Ta    \&No   Ta    closed by \&.Fc  
 .It \&.Ec    Ta    Yes   Ta    Yes    Ta    opened by \&.Eo  
 .It \&.Eo    Ta    Yes   Ta    Yes    Ta    closed by \&.Ec  
 .It \&.Qc    Ta    Yes   Ta    Yes    Ta    opened by \&.Oo  
 .It \&.Qo    Ta    Yes   Ta    Yes    Ta    closed by \&.Oc  
 .It \&.Re    Ta    \&No  Ta    \&No   Ta    opened by \&.Rs  
 .It \&.Rs    Ta    \&No  Ta    \&No   Ta    closed by \&.Re  
 .El  
 .\" SUB-SECTION  
 .Ss In-line  
 In-line macros have only text children.  If a number (or inequality) of  
 arguments is  arguments is
 .Pq n ,  .  Pq n ,
 then the macro accepts an arbitrary number of arguments.  then the macro accepts an arbitrary number of arguments.
 .Pp  .  Bd -literal -offset indent
 .Bl -column "MacroX" "CallableX" "ParsableX" "Arguments" -compact -offset XXXX  \&.Yo \(lB\-arg \(lBval...\(rB\(rB \(lBargs...\(rB \(lbres...\(rb
 .It Em Macro Ta Em Callable Ta Em Parsable Ta Em Arguments  
 .It \&.Dd    Ta    \&No  Ta    \&No    Ta    >0  \&.Yo \(lB\-arg \(lBval...\(rB\(rB \(lBargs...\(rB Yc...
 .It \&.Dt    Ta    \&No  Ta    \&No    Ta    n  
 .It \&.Os    Ta    \&No  Ta    \&No    Ta    n  \&.Yo \(lB\-arg \(lBval...\(rB\(rB arg0 arg1 argN
 .It \&.Pp    Ta    \&No  Ta    \&No    Ta    0  .  Ed
 .It \&.Ad    Ta    Yes   Ta    Yes     Ta    n  .  Pp
 .It \&.An    Ta    Yes   Ta    Yes     Ta    n  .  Bl -column "MacroX" "CallableX" "ParsableX" "Arguments" -compact -offset indent
 .It \&.Ar    Ta    Yes   Ta    Yes     Ta    n  .   It Em Macro Ta Em Callable Ta Em Parsable Ta Em Arguments
 .It \&.Cd    Ta    Yes   Ta    \&No    Ta    >0  .   It \&%A     Ta    \&No     Ta    \&No     Ta    >0
 .It \&.Cm    Ta    Yes   Ta    Yes     Ta    n  .   It \&%B     Ta    \&No     Ta    \&No     Ta    >0
 .It \&.Dv    Ta    Yes   Ta    Yes     Ta    n  .   It \&%C     Ta    \&No     Ta    \&No     Ta    >0
 .It \&.Er    Ta    Yes   Ta    Yes     Ta    >0  .   It \&%D     Ta    \&No     Ta    \&No     Ta    >0
 .It \&.Ev    Ta    Yes   Ta    Yes     Ta    n  .   It \&%I     Ta    \&No     Ta    \&No     Ta    >0
 .It \&.Ex    Ta    \&No  Ta    \&No    Ta    0  .   It \&%J     Ta    \&No     Ta    \&No     Ta    >0
 .It \&.Fa    Ta    Yes   Ta    Yes     Ta    n  .   It \&%N     Ta    \&No     Ta    \&No     Ta    >0
 .It \&.Fd    Ta    \&No  Ta    \&No    Ta    >0  .   It \&%O     Ta    \&No     Ta    \&No     Ta    >0
 .It \&.Fl    Ta    Yes   Ta    Yes     Ta    n  .   It \&%P     Ta    \&No     Ta    \&No     Ta    >0
 .It \&.Fn    Ta    Yes   Ta    Yes     Ta    >0  .   It \&%R     Ta    \&No     Ta    \&No     Ta    >0
 .It \&.Ft    Ta    Yes   Ta    Yes     Ta    n  .   It \&%T     Ta    \&No     Ta    \&No     Ta    >0
 .It \&.Ic    Ta    Yes   Ta    Yes     Ta    >0  .   It \&%V     Ta    \&No     Ta    \&No     Ta    >0
 .It \&.In    Ta    \&No  Ta    \&No    Ta    n  .   It \&Ad     Ta    Yes      Ta    Yes      Ta    n
 .It \&.Li    Ta    Yes   Ta    Yes     Ta    n  .   It \&An     Ta    Yes      Ta    Yes      Ta    n
 .It \&.Nd    Ta    \&No  Ta    \&No    Ta    n  .   It \&Ap     Ta    Yes      Ta    Yes      Ta    0
 .It \&.Nm    Ta    Yes   Ta    Yes     Ta    n  .   It \&Ar     Ta    Yes      Ta    Yes      Ta    n
 .It \&.Ot    Ta    \&No  Ta    \&No    Ta    n  .   It \&At     Ta    Yes      Ta    Yes      Ta    1
 .It \&.Pa    Ta    Yes   Ta    Yes     Ta    n  .   It \&Bsx    Ta    Yes      Ta    Yes      Ta    n
 .It \&.Rv    Ta    \&No  Ta    \&No    Ta    0  .   It \&Bt     Ta    \&No     Ta    \&No     Ta    0
 .It \&.St    Ta    \&No  Ta    Yes     Ta    1  .   It \&Bx     Ta    Yes      Ta    Yes      Ta    n
 .It \&.Va    Ta    Yes   Ta    Yes     Ta    n  .   It \&Cd     Ta    Yes      Ta    Yes      Ta    >0
 .It \&.Vt    Ta    Yes   Ta    Yes     Ta    >0  .   It \&Cm     Ta    Yes      Ta    Yes      Ta    n
 .It \&.Xr    Ta    Yes   Ta    Yes     Ta    >0, <3  .   It \&Db     Ta    \&No     Ta    \&No     Ta    1
 .It \&.%A    Ta    \&No  Ta    \&No    Ta    >0  .   It \&Dd     Ta    \&No     Ta    \&No     Ta    >0
 .It \&.%B    Ta    \&No  Ta    \&No    Ta    >0  .   It \&Dt     Ta    \&No     Ta    \&No     Ta    n
 .It \&.%C    Ta    \&No  Ta    \&No    Ta    >0  .   It \&Dv     Ta    Yes      Ta    Yes      Ta    n
 .It \&.%D    Ta    \&No  Ta    \&No    Ta    >0  .   It \&Dx     Ta    Yes      Ta    Yes      Ta    n
 .It \&.%I    Ta    \&No  Ta    \&No    Ta    >0  .   It \&Em     Ta    Yes      Ta    Yes      Ta    >0
 .It \&.%J    Ta    \&No  Ta    \&No    Ta    >0  .   It \&En     Ta    \&No     Ta    \&No     Ta    0
 .It \&.%N    Ta    \&No  Ta    \&No    Ta    >0  .   It \&Er     Ta    Yes      Ta    Yes      Ta    >0
 .It \&.%O    Ta    \&No  Ta    \&No    Ta    >0  .   It \&Es     Ta    \&No     Ta    \&No     Ta    0
 .It \&.%P    Ta    \&No  Ta    \&No    Ta    >0  .   It \&Ev     Ta    Yes      Ta    Yes      Ta    n
 .It \&.%R    Ta    \&No  Ta    \&No    Ta    >0  .   It \&Ex     Ta    \&No     Ta    \&No     Ta    0
 .It \&.%T    Ta    \&No  Ta    \&No    Ta    >0  .   It \&Fa     Ta    Yes      Ta    Yes      Ta    n
 .It \&.%V    Ta    \&No  Ta    \&No    Ta    >0  .   It \&Fd     Ta    \&No     Ta    \&No     Ta    >0
 .It \&.At    Ta    Yes   Ta    Yes     Ta    1  .   It \&Fl     Ta    Yes      Ta    Yes      Ta    n
 .It \&.Bsx   Ta    Yes   Ta    Yes     Ta    n  .   It \&Fn     Ta    Yes      Ta    Yes      Ta    >0
 .It \&.Bx    Ta    Yes   Ta    Yes     Ta    n  .   It \&Fr     Ta    \&No     Ta    \&No     Ta    n
 .It \&.Db    Ta    \&No  Ta    \&No    Ta    1  .   It \&Ft     Ta    Yes      Ta    Yes      Ta    n
 .It \&.Em    Ta    Yes   Ta    Yes     Ta    >0  .   It \&Fx     Ta    Yes      Ta    Yes      Ta    n
 .It \&.Fx    Ta    Yes   Ta    Yes     Ta    n  .   It \&Hf     Ta    \&No     Ta    \&No     Ta    n
 .It \&.Ms    Ta    Yes   Ta    Yes     Ta    >0  .   It \&Ic     Ta    Yes      Ta    Yes      Ta    >0
 .It \&.No    Ta    Yes   Ta    Yes     Ta    0  .   It \&In     Ta    \&No     Ta    \&No     Ta    n
 .It \&.Ns    Ta    Yes   Ta    Yes     Ta    0  .   It \&Lb     Ta    \&No     Ta    \&No     Ta    1
 .It \&.Nx    Ta    Yes   Ta    Yes     Ta    n  .   It \&Li     Ta    Yes      Ta    Yes      Ta    n
 .It \&.Ox    Ta    Yes   Ta    Yes     Ta    n  .   It \&Lk     Ta    Yes      Ta    Yes      Ta    n
 .It \&.Pf    Ta    \&No  Ta    Yes     Ta    1  .   It \&Lp     Ta    \&No     Ta    \&No     Ta    0
 .It \&.Sm    Ta    \&No  Ta    \&No    Ta    1  .   It \&Ms     Ta    Yes      Ta    Yes      Ta    >0
 .It \&.Sx    Ta    Yes   Ta    Yes     Ta    >0  .   It \&Mt     Ta    Yes      Ta    Yes      Ta    >0
 .It \&.Sy    Ta    Yes   Ta    Yes     Ta    >0  .   It \&Nm     Ta    Yes      Ta    Yes      Ta    n
 .It \&.Tn    Ta    Yes   Ta    Yes     Ta    >0  .   It \&No     Ta    Yes      Ta    Yes      Ta    0
 .It \&.Ux    Ta    Yes   Ta    Yes     Ta    n  .   It \&Ns     Ta    Yes      Ta    Yes      Ta    0
 .It \&.Dx    Ta    Yes   Ta    Yes     Ta    n  .   It \&Nx     Ta    Yes      Ta    Yes      Ta    n
 .It \&.Bt    Ta    \&No  Ta    \&No    Ta    0  .   It \&Os     Ta    \&No     Ta    \&No     Ta    n
 .It \&.Hf    Ta    \&No  Ta    \&No    Ta    n  .   It \&Ot     Ta    \&No     Ta    \&No     Ta    n
 .It \&.Fr    Ta    \&No  Ta    \&No    Ta    n  .   It \&Ox     Ta    Yes      Ta    Yes      Ta    n
 .It \&.Ud    Ta    \&No  Ta    \&No    Ta    0  .   It \&Pa     Ta    Yes      Ta    Yes      Ta    n
 .It \&.Lb    Ta    \&No  Ta    \&No    Ta    1  .   It \&Pf     Ta    \&No     Ta    Yes      Ta    1
 .It \&.Ap    Ta    Yes   Ta    Yes     Ta    0  .   It \&Pp     Ta    \&No     Ta    \&No     Ta    0
 .It \&.Lp    Ta    \&No  Ta    \&No    Ta    0  .   It \&Rv     Ta    \&No     Ta    \&No     Ta    0
 .It \&.Lk    Ta    Yes   Ta    Yes     Ta    n  .   It \&Sm     Ta    \&No     Ta    \&No     Ta    1
 .It \&.Mt    Ta    Yes   Ta    Yes     Ta    >0  .   It \&St     Ta    \&No     Ta    Yes      Ta    1
 .It \&.Es    Ta    \&No  Ta    \&No    Ta    0  .   It \&Sx     Ta    Yes      Ta    Yes      Ta    >0
 .It \&.En    Ta    \&No  Ta    \&No    Ta    0  .   It \&Sy     Ta    Yes      Ta    Yes      Ta    >0
 .El  .   It \&Tn     Ta    Yes      Ta    Yes      Ta    >0
 .Pp  .   It \&Ud     Ta    \&No     Ta    \&No     Ta    0
 The  .   It \&Ux     Ta    Yes      Ta    Yes      Ta    n
 .Sq \&.Ot ,  .   It \&Va     Ta    Yes      Ta    Yes      Ta    n
 .Sq \&.Fr ,  .   It \&Vt     Ta    Yes      Ta    Yes      Ta    >0
 .Sq \&.Es  .   It \&Xr     Ta    Yes      Ta    Yes      Ta    >0, <3
 and  .   It \&br     Ta    \&No     Ta    \&No     Ta    0
 .Sq \&.En ,  .   It \&sp     Ta    \&No     Ta    \&No     Ta    1
 macros are obsolete.  .  El
 .\" SECTION  .
   .
 .Sh COMPATIBILITY  .Sh COMPATIBILITY
 This section documents compatibility with other roff implementations, at  This section documents compatibility with other roff implementations, at
 this time limited to  this time limited to
 .Xr groff 1 .  . Xr groff 1 .
 The term  The term
 .Qq historic groff  . Qq historic groff
 refers to those versions before the  refers to those versions before the
 .Pa doc.tmac  . Pa doc.tmac
 file re-write  file re-write
 .Pq somewhere between 1.15 and 1.19 .  . Pq somewhere between 1.15 and 1.19 .
 .Pp  . Pp
 .Bl -dash -compact  . Bl -dash -compact
 .\" LIST-ITEM  .  It
 .It  The
 Some character sequences in groff are not handled depending on escape  .   Sq \-split
 style, e.g.,  or
 .Sq \e(ba  .   Sq \-nosplit
 and  argument to
 .Sq \e*(Ba  .   Sq \&An
 may not be interchanged.  This is no longer the case: all character  applies to the whole document, not just to the current section as it
 sequences resolve to the same symbol, regardless the escape style.  does in groff.
 .\" LIST-ITEM  .  It
 .It  In quoted literals, groff allowed pair-wise double-quotes to produce a
   standalone double-quote in formatted output.  This idiosyncratic
   behaviour is no longer applicable.
   .  It
   The
   .   Sq \&sp
   macro does not accept negative numbers.
   .  It
 Blocks of whitespace are stripped from both macro and free-form text  Blocks of whitespace are stripped from both macro and free-form text
 lines (except when in literal mode), while groff would retain whitespace  lines (except when in literal mode), while groff would retain whitespace
 in free-form text lines.  in free-form text lines.
 .\" LIST-ITEM  .  It
 .It  
 Historic groff has many un-callable macros.  Most of these (excluding  Historic groff has many un-callable macros.  Most of these (excluding
 some block-level macros) are now callable, conforming to the  some block-level macros) are now callable, conforming to the
 non-historic groff version.  non-historic groff version.
 .\" LIST-ITEM  .  It
 .It  The vertical bar
 The vertical bar  .   Sq \(ba
 .Sq \(ba  
 made historic groff  made historic groff
 .Qq go orbital  .   Qq go orbital
 but is a proper delimiter in this implementation.  but is a proper delimiter in this implementation.
 .\" LIST-ITEM  .  It
 .It  .   Sq \&It \-nested
 .Sq \&.It \-nested  
 is assumed for all lists (it wasn't in historic groff): any list may be  is assumed for all lists (it wasn't in historic groff): any list may be
 nested and  nested and
 .Sq \-enum  .   Sq \-enum
 lists will restart the sequence only for the sub-list.  lists will restart the sequence only for the sub-list.
 .\" LIST-ITEM  .  It
 .It  .   Sq \&It \-column
 .Sq \&.It \-column  
 syntax where column widths may be preceded by other arguments (instead  syntax where column widths may be preceded by other arguments (instead
 of proceeded) is not supported.  of proceeded) is not supported.
 .\" LIST-ITEM  .  It
 .It  The
 The  .   Sq \&At
 .Sq \&.At  
 macro only accepts a single parameter.  macro only accepts a single parameter.
 .\" LIST-ITEM  .  It
 .It  
 Some manuals use  Some manuals use
 .Sq \&.Li  .   Sq \&Li
 incorrectly by following it with a reserved character and expecting the  incorrectly by following it with a reserved character and expecting the
 delimiter to render.  This is not supported.  delimiter to render.  This is not supported.
 .\" LIST-ITEM  .  It
 .It  In groff, the
 If an special-character control character is escaped  .   Sq \&Fo
 .Sq \e\e ,  macro only produces the first parameter.  This is no longer the case.
 it will obviously not render the subsequent sequence.  Even newer  . El
 versions of groff seem to dither on this.  .
 .El  .
 .\" SECTION  
 .Sh SEE ALSO  .Sh SEE ALSO
 .Xr mandoc 1 ,  . Xr mandoc 1 ,
 .Xr mandoc_char 7  . Xr mandoc_char 7
 .\" SECTION  .
   .
 .Sh AUTHORS  .Sh AUTHORS
 The  The
 .Nm  . Nm
 utility was written by  reference was written by
 .An Kristaps Dzonsons Aq kristaps@kth.se .  . An Kristaps Dzonsons Aq kristaps@kth.se .
 .\" SECTION  .
   .
 .Sh CAVEATS  .Sh CAVEATS
 There are many ambiguous parts of mdoc.  There are many ambiguous parts of mdoc.
 .Pp  . Pp
 .Bl -dash -compact  . Bl -dash -compact
 .\" LIST-ITEM  .  It
 .It  .   Sq \&Fa
 .Sq \&.Fa  should be
 should be  .   Sq \&Va
 .Sq \&.Va  
 as function arguments are variables.  as function arguments are variables.
 .\" LIST-ITEM  .  It
 .It  .   Sq \&Ft
 .Sq \&.Ft  
 should be  should be
 .Sq \&.Vt  .   Sq \&Vt
 as function return types are still types.  Furthermore, the  as function return types are still types.  Furthermore, the
 .Sq \&.Ft  .   Sq \&Ft
 should be removed and  should be removed and
 .Sq \&.Fo ,  .   Sq \&Fo ,
 which ostensibly follows it, should follow the same convention as  which ostensibly follows it, should follow the same convention as
 .Sq \&.Va .  .   Sq \&Va .
 .\" LIST-ITEM  .  It
 .It  .   Sq \&Va
 .Sq \&.Va  
 should formalise that only one or two arguments are acceptable: a  should formalise that only one or two arguments are acceptable: a
 variable name and optional, preceding type.  variable name and optional, preceding type.
 .\" LIST-ITEM  .  It
 .It  .   Sq \&Fd
 .Sq \&.Fd  
 is ambiguous.  It's commonly used to indicate an include file in the  is ambiguous.  It's commonly used to indicate an include file in the
 synopsis section.  synopsis section.
 .Sq \&.In  .   Sq \&In
 should be used, instead.  should be used, instead.
 .\" LIST-ITEM  .  It
 .It  
 Only the  Only the
 .Sq \-literal  .   Sq \-literal
 argument to  argument to
 .Sq \&.Bd  .   Sq \&Bd
 makes sense.  The remaining ones should be removed.  makes sense.  The remaining ones should be removed.
 .\" LIST-ITEM  .  It
 .It  The
 The  .   Sq \&Xo
 .Sq \&.Xo  
 and  and
 .Sq \&.Xc  .   Sq \&Xc
 macros should be deprecated.  macros should be deprecated.
 .\" LIST-ITEM  .  It
 .It  
 The  The
 .Sq \&.Dt  .   Sq \&Dt
 macro lacks clarity.  It should be absolutely clear which title will  macro lacks clarity.  It should be absolutely clear which title will
 render when formatting the manual page.  render when formatting the manual page.
 .\" LIST-ITEM  .  It
 .It  
 A  A
 .Sq \&.Lx  .   Sq \&Lx
 should be provided for Linux (\(`a la  should be provided for Linux (\(`a la
 .Sq \&.Ox ,  .   Sq \&Ox ,
 .Sq \&.Nx  .   Sq \&Nx
 etc.).  etc.).
 .\" LIST-ITEM  .  It
 .It  
 There's no way to refer to references in  There's no way to refer to references in
 .Sq \&.Rs/.Re  .   Sq \&Rs/Re
 blocks.  blocks.
 .\" LIST-ITEM  .  It
 .It  The \-split and \-nosplit dictates via
 The \-split and \-nosplit arguments to  .   Sq \&An
 .Sq \&.An  are re-set when entering and leaving the AUTHORS section.
 are inane.  . El
 .\" LIST-ITEM  .
 .It  
 The end-of-line whitespace warnings are superfluous holdovers from  
 historic groff.  
 .El  
Legend:
Removed from v.1.38  
changed lines
  Added in v.1.56
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