Noticed that our skeleton mdoc.7 had lower-case `Dt'. Fixed and added

[mandoc.git] / mdoc.7

diff --git a/mdoc.7 b/mdoc.7
index 6ecd5a7b292490fd869908b9f41a8dcffbb61870..5bd8aa109fd7c8ede9bdfbba123cde6d62e3e2fc 100644 (file)
--- a/mdoc.7
+++ b/mdoc.7
@@ -1,6 +1,6 @@
-.\"    $Id: mdoc.7,v 1.174 2011/01/04 23:32:21 kristaps Exp $
+.\"    $Id: mdoc.7,v 1.188 2011/05/26 09:26:16 kristaps Exp $

 .\"
 .\"

-.\" Copyright (c) 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
+.\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>

 .\" Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>
 .\"
 .\" Permission to use, copy, modify, and distribute this software for any
 .\" Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>
 .\"
 .\" Permission to use, copy, modify, and distribute this software for any


@@ -15,7 +15,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"

-.Dd $Mdocdate: January 4 2011 $
+.Dd $Mdocdate: May 26 2011 $

 .Dt MDOC 7
 .Os
 .Sh NAME
 .Dt MDOC 7
 .Os
 .Sh NAME


@@ -40,37 +40,39 @@ An
 .Nm
 document follows simple rules: lines beginning with the control
 character
 .Nm
 document follows simple rules: lines beginning with the control
 character

-.Sq \.
+.Sq \&.

 are parsed for macros.
 are parsed for macros.

-Other lines are interpreted within the scope of
-prior macros:
+Text lines, those not beginning with the control character, are
+interpreted within the scope of prior macros:

 .Bd -literal -offset indent
 \&.Sh Macro lines change control state.
 .Bd -literal -offset indent
 \&.Sh Macro lines change control state.

-Other lines are interpreted within the current state.
+Text lines are interpreted within the current state.

 .Ed
 .Sh LANGUAGE SYNTAX
 .Nm
 documents may contain only graphable 7-bit ASCII characters, the space
 character, and, in certain circumstances, the tab character.
 .Ed
 .Sh LANGUAGE SYNTAX
 .Nm
 documents may contain only graphable 7-bit ASCII characters, the space
 character, and, in certain circumstances, the tab character.

-All manuals must have
-.Ux
-line terminators.
+.Pp
+If the first character of a text line is a space, that line is printed
+with a leading newline.

 .Ss Comments
 Text following a
 .Sq \e\*q ,
 .Ss Comments
 Text following a
 .Sq \e\*q ,

-whether in a macro or free-form text line, is ignored to the end of
+whether in a macro or text line, is ignored to the end of

 line.
 A macro line with only a control character and comment escape,
 .Sq \&.\e\*q ,
 is also ignored.
 Macro lines with only a control character and optional whitespace are
 stripped from input.
 line.
 A macro line with only a control character and comment escape,
 .Sq \&.\e\*q ,
 is also ignored.
 Macro lines with only a control character and optional whitespace are
 stripped from input.

-.Ss Reserved Characters
-Within a macro line, the following characters are reserved:
+.Ss Reserved Terms
+Within a macro line, the following terms are reserved:

 .Pp
 .Bl -tag -width Ds -offset indent -compact
 .It \&.
 .Pq period
 .Pp
 .Bl -tag -width Ds -offset indent -compact
 .It \&.
 .Pq period

+.It \e.
+.Pq escaped period

 .It \&,
 .Pq comma
 .It \&:
 .It \&,
 .Pq comma
 .It \&:


@@ -91,16 +93,16 @@ Within a macro line, the following characters are reserved:
 .Pq exclamation
 .It \&|
 .Pq vertical bar
 .Pq exclamation
 .It \&|
 .Pq vertical bar

+.It \e*(Ba
+.Pq reserved-word vertical bar

 .El
 .Pp
 .El
 .Pp

-Use of reserved characters is described in
-.Sx MACRO SYNTAX .
-For general use in macro lines, these characters can either be escaped
-with a non-breaking space
-.Pq Sq \e&
-or, if applicable, an appropriate escape sequence can be used.
+For general use in macro lines, these can be escaped with a non-breaking
+space
+.Pq Sq \e& .
+In text lines, these may be used as normal punctuation.

 .Ss Special Characters
 .Ss Special Characters

-Special characters may occur in both macro and free-form lines.
+Special characters may occur in both macro and text lines.

 Sequences begin with the escape character
 .Sq \e
 followed by either an open-parenthesis
 Sequences begin with the escape character
 .Sq \e
 followed by either an open-parenthesis


@@ -129,18 +131,15 @@ escape followed by an indicator: B (bold), I (italic), R (Roman), or P
 .Pp
 A numerical representation 3, 2, or 1 (bold, italic, and Roman,
 respectively) may be used instead.
 .Pp
 A numerical representation 3, 2, or 1 (bold, italic, and Roman,
 respectively) may be used instead.

-A text decoration is valid within
-the current font scope only: if a macro opens a font scope alongside
-its own scope, such as
-.Sx \&Bf
-.Cm \&Sy ,
-in-scope invocations of
-.Sq \ef
-are only valid within the font scope of the macro.
-If
+If a macro opens a font scope after calling
+.Sq \ef ,
+such as with
+.Sx \&Bf ,
+the

 .Sq \ef
 .Sq \ef

-is specified outside of any font scope, such as in unenclosed, free-form
-text, it will affect the remainder of the document.
+mode will be restored upon exiting the
+.Sx \&Bf
+scope.

 .Pp
 Note this form is
 .Em not
 .Pp
 Note this form is
 .Em not


@@ -174,9 +173,9 @@ and
 .Pq vertical bar .
 .Ss Whitespace
 Whitespace consists of the space character.
 .Pq vertical bar .
 .Ss Whitespace
 Whitespace consists of the space character.

-In free-form lines, whitespace is preserved within a line; unescaped
+In text lines, whitespace is preserved within a line; unescaped

 trailing spaces are stripped from input (unless in a literal context).
 trailing spaces are stripped from input (unless in a literal context).

-Blank free-form lines, which may include whitespace, are only permitted
+Blank text lines, which may include whitespace, are only permitted

 within literal contexts.
 .Pp
 In macro lines, whitespace delimits arguments and is discarded.
 within literal contexts.
 .Pp
 In macro lines, whitespace delimits arguments and is discarded.


@@ -196,35 +195,7 @@ Thus, the following produces
 \&.Op "Fl a"
 .Ed
 .Pp
 \&.Op "Fl a"
 .Ed
 .Pp

-In free-form mode, quotes are regarded as opaque text.
-.Ss Dates
-There are several macros in
-.Nm
-that require a date argument.
-The canonical form for dates is the American format:
-.Pp
-.D1 Cm Month Day , Year
-.Pp
-The
-.Cm Day
-value is an optionally zero-padded numeral.
-The
-.Cm Month
-value is the full month name.
-The
-.Cm Year
-value is the full four-digit year.
-.Pp
-Reduced form dates are broken-down canonical form dates:
-.Pp
-.D1 Cm Month , Year
-.D1 Cm Year
-.Pp
-Some examples of valid dates follow:
-.Pp
-.D1 "May, 2009" Pq reduced form
-.D1 "2009" Pq reduced form
-.D1 "May 20, 2009" Pq canonical form
+In text lines, quotes are regarded as opaque text.

 .Ss Scaling Widths
 Many macros support scaled widths for their arguments, such as
 stipulating a two-inch list indentation with the following:
 .Ss Scaling Widths
 Many macros support scaled widths for their arguments, such as
 stipulating a two-inch list indentation with the following:


@@ -283,18 +254,20 @@ a line.
 By doing so, front-ends will be able to apply the proper amount of
 spacing after the end of sentence (unescaped) period, exclamation mark,
 or question mark followed by zero or more non-sentence closing
 By doing so, front-ends will be able to apply the proper amount of
 spacing after the end of sentence (unescaped) period, exclamation mark,
 or question mark followed by zero or more non-sentence closing

-delimiters (
-.Ns Sq \&) ,
+delimiters
+.Po
+.Sq \&) ,

 .Sq \&] ,
 .Sq \&' ,
 .Sq \&] ,
 .Sq \&' ,

-.Sq \&" ) .
+.Sq \&"
+.Pc .

 .Pp
 The proper spacing is also intelligently preserved if a sentence ends at
 the boundary of a macro line.
 For example:
 .Pp
 .Pp
 The proper spacing is also intelligently preserved if a sentence ends at
 the boundary of a macro line.
 For example:
 .Pp

-.Dl \&Xr mandoc 1 \.
-.Dl \&Fl T \&Ns \&Cm ascii \.
+.Dl \&.Xr mandoc 1 \&.
+.Dl \&.Fl T \&Ns \&Cm ascii \&.

 .Sh MANUAL STRUCTURE
 A well-formed
 .Nm
 .Sh MANUAL STRUCTURE
 A well-formed
 .Nm


@@ -323,19 +296,20 @@ sections, although this varies between manual sections.
 .Pp
 The following is a well-formed skeleton
 .Nm
 .Pp
 The following is a well-formed skeleton
 .Nm

-file:
+file for a utility
+.Qq progname :

 .Bd -literal -offset indent
 \&.Dd $\&Mdocdate$
 .Bd -literal -offset indent
 \&.Dd $\&Mdocdate$

-\&.Dt mdoc 7
+\&.Dt PROGNAME section

 \&.Os
 \&.Sh NAME
 \&.Os
 \&.Sh NAME

-\&.Nm foo
+\&.Nm progname

 \&.Nd a description goes here
 \&.\e\*q .Sh LIBRARY
 \&.\e\*q For sections 2, 3, & 9 only.
 \&.\e\*q Not used in OpenBSD.
 \&.Sh SYNOPSIS
 \&.Nd a description goes here
 \&.\e\*q .Sh LIBRARY
 \&.\e\*q For sections 2, 3, & 9 only.
 \&.\e\*q Not used in OpenBSD.
 \&.Sh SYNOPSIS

-\&.Nm foo
+\&.Nm progname

 \&.Op Fl options
 \&.Ar
 \&.Sh DESCRIPTION
 \&.Op Fl options
 \&.Ar
 \&.Sh DESCRIPTION


@@ -382,6 +356,10 @@ The syntax for this as follows:
 \&.Nd a one line description
 .Ed
 .Pp
 \&.Nd a one line description
 .Ed
 .Pp

+Multiple
+.Sq \&Nm
+names should be separated by commas.
+.Pp

 The
 .Sx \&Nm
 macro(s) must precede the
 The
 .Sx \&Nm
 macro(s) must precede the


@@ -409,16 +387,18 @@ configuration.
 For the first, utilities (sections 1, 6, and 8), this is
 generally structured as follows:
 .Bd -literal -offset indent
 For the first, utilities (sections 1, 6, and 8), this is
 generally structured as follows:
 .Bd -literal -offset indent

-\&.Nm foo
+\&.Nm bar

 \&.Op Fl v
 \&.Op Fl o Ar file
 \&.Op Ar
 \&.Op Fl v
 \&.Op Fl o Ar file
 \&.Op Ar

-\&.Nm bar
+\&.Nm foo

 \&.Op Fl v
 \&.Op Fl o Ar file
 \&.Op Ar
 .Ed
 .Pp
 \&.Op Fl v
 \&.Op Fl o Ar file
 \&.Op Ar
 .Ed
 .Pp

+Commands should be ordered alphabetically.
+.Pp

 For the second, function calls (sections 2, 3, 9):
 .Bd -literal -offset indent
 \&.In header.h
 For the second, function calls (sections 2, 3, 9):
 .Bd -literal -offset indent
 \&.In header.h


@@ -429,6 +409,14 @@ For the second, function calls (sections 2, 3, 9):
 \&.Fn bar "const char *src"
 .Ed
 .Pp
 \&.Fn bar "const char *src"
 .Ed
 .Pp

+Ordering of
+.Sx \&In ,
+.Sx \&Vt ,
+.Sx \&Fn ,
+and
+.Sx \&Fo
+macros should follow C header-file conventions.
+.Pp

 And for the third, configurations (section 4):
 .Bd -literal -offset indent
 \&.Cd \*qit* at isa? port 0x2e\*q
 And for the third, configurations (section 4):
 .Bd -literal -offset indent
 \&.Cd \*qit* at isa? port 0x2e\*q


@@ -477,9 +465,15 @@ or
 .Sx \&Ss
 macro or the end of an enclosing block, whichever comes first.
 .It Em DESCRIPTION
 .Sx \&Ss
 macro or the end of an enclosing block, whichever comes first.
 .It Em DESCRIPTION

-This expands upon the brief, one line description in
-.Em NAME .
-It usually contains a breakdown of the options (if documenting a
+This begins with an expansion of the brief, one line description in
+.Em NAME :
+.Bd -literal -offset indent
+The
+\&.Nm
+utility does this, that, and the other.
+.Ed
+.Pp
+It usually follows with a breakdown of the options (if documenting a

 command), such as:
 .Bd -literal -offset indent
 The arguments are as follows:
 command), such as:
 .Bd -literal -offset indent
 The arguments are as follows:


@@ -627,7 +621,10 @@ column, if applicable, describes closure rules.
 Multi-line scope closed by an explicit closing macro.
 All macros contains bodies; only
 .Sx \&Bf
 Multi-line scope closed by an explicit closing macro.
 All macros contains bodies; only
 .Sx \&Bf

-contains a head.
+and
+.Pq optionally
+.Sx \&Bl
+contain a head.

 .Bd -literal -offset indent
 \&.Yo \(lB\-arg \(lBparm...\(rB\(rB \(lBhead...\(rB
 \(lBbody...\(rB
 .Bd -literal -offset indent
 \&.Yo \(lB\-arg \(lBparm...\(rB\(rB \(lBhead...\(rB
 \(lBbody...\(rB


@@ -732,7 +729,7 @@ and/or tail
 .El
 .Ss Block partial-implicit
 Like block full-implicit, but with single-line scope closed by
 .El
 .Ss Block partial-implicit
 Like block full-implicit, but with single-line scope closed by

-.Sx Reserved Characters
+.Sx Reserved Terms

 or end of line.
 .Bd -literal -offset indent
 \&.Yo \(lB\-arg \(lBval...\(rB\(rB \(lBbody...\(rB \(lBres...\(rB
 or end of line.
 .Bd -literal -offset indent
 \&.Yo \(lB\-arg \(lBval...\(rB\(rB \(lBbody...\(rB \(lBres...\(rB


@@ -765,7 +762,7 @@ section line, else it is
 .Sx In-line .
 .Ss In-line
 Closed by
 .Sx In-line .
 .Ss In-line
 Closed by

-.Sx Reserved Characters ,
+.Sx Reserved Terms ,

 end of line, fixed argument lengths, and/or subsequent macros.
 In-line macros have only text children.
 If a number (or inequality) of arguments is
 end of line, fixed argument lengths, and/or subsequent macros.
 In-line macros have only text children.
 If a number (or inequality) of arguments is


@@ -795,8 +792,8 @@ then the macro accepts an arbitrary number of arguments.
 .It Sx \&%T  Ta    \&No     Ta    \&No     Ta    >0
 .It Sx \&%U  Ta    \&No     Ta    \&No     Ta    >0
 .It Sx \&%V  Ta    \&No     Ta    \&No     Ta    >0
 .It Sx \&%T  Ta    \&No     Ta    \&No     Ta    >0
 .It Sx \&%U  Ta    \&No     Ta    \&No     Ta    >0
 .It Sx \&%V  Ta    \&No     Ta    \&No     Ta    >0

-.It Sx \&Ad  Ta    Yes      Ta    Yes      Ta    n
-.It Sx \&An  Ta    Yes      Ta    Yes      Ta    n
+.It Sx \&Ad  Ta    Yes      Ta    Yes      Ta    >0
+.It Sx \&An  Ta    Yes      Ta    Yes      Ta    >0

 .It Sx \&Ap  Ta    Yes      Ta    Yes      Ta    0
 .It Sx \&Ar  Ta    Yes      Ta    Yes      Ta    n
 .It Sx \&At  Ta    Yes      Ta    Yes      Ta    1
 .It Sx \&Ap  Ta    Yes      Ta    Yes      Ta    0
 .It Sx \&Ar  Ta    Yes      Ta    Yes      Ta    n
 .It Sx \&At  Ta    Yes      Ta    Yes      Ta    1


@@ -804,31 +801,31 @@ then the macro accepts an arbitrary number of arguments.
 .It Sx \&Bt  Ta    \&No     Ta    \&No     Ta    0
 .It Sx \&Bx  Ta    Yes      Ta    Yes      Ta    n
 .It Sx \&Cd  Ta    Yes      Ta    Yes      Ta    >0
 .It Sx \&Bt  Ta    \&No     Ta    \&No     Ta    0
 .It Sx \&Bx  Ta    Yes      Ta    Yes      Ta    n
 .It Sx \&Cd  Ta    Yes      Ta    Yes      Ta    >0

-.It Sx \&Cm  Ta    Yes      Ta    Yes      Ta    n
+.It Sx \&Cm  Ta    Yes      Ta    Yes      Ta    >0

 .It Sx \&Db  Ta    \&No     Ta    \&No     Ta    1
 .It Sx \&Dd  Ta    \&No     Ta    \&No     Ta    n
 .It Sx \&Dt  Ta    \&No     Ta    \&No     Ta    n
 .It Sx \&Db  Ta    \&No     Ta    \&No     Ta    1
 .It Sx \&Dd  Ta    \&No     Ta    \&No     Ta    n
 .It Sx \&Dt  Ta    \&No     Ta    \&No     Ta    n

-.It Sx \&Dv  Ta    Yes      Ta    Yes      Ta    n
+.It Sx \&Dv  Ta    Yes      Ta    Yes      Ta    >0

 .It Sx \&Dx  Ta    Yes      Ta    Yes      Ta    n
 .It Sx \&Em  Ta    Yes      Ta    Yes      Ta    >0
 .It Sx \&En  Ta    \&No     Ta    \&No     Ta    0
 .It Sx \&Er  Ta    Yes      Ta    Yes      Ta    >0
 .It Sx \&Es  Ta    \&No     Ta    \&No     Ta    0
 .It Sx \&Dx  Ta    Yes      Ta    Yes      Ta    n
 .It Sx \&Em  Ta    Yes      Ta    Yes      Ta    >0
 .It Sx \&En  Ta    \&No     Ta    \&No     Ta    0
 .It Sx \&Er  Ta    Yes      Ta    Yes      Ta    >0
 .It Sx \&Es  Ta    \&No     Ta    \&No     Ta    0

-.It Sx \&Ev  Ta    Yes      Ta    Yes      Ta    n
+.It Sx \&Ev  Ta    Yes      Ta    Yes      Ta    >0

 .It Sx \&Ex  Ta    \&No     Ta    \&No     Ta    n
 .It Sx \&Ex  Ta    \&No     Ta    \&No     Ta    n

-.It Sx \&Fa  Ta    Yes      Ta    Yes      Ta    n
+.It Sx \&Fa  Ta    Yes      Ta    Yes      Ta    >0

 .It Sx \&Fd  Ta    \&No     Ta    \&No     Ta    >0
 .It Sx \&Fl  Ta    Yes      Ta    Yes      Ta    n
 .It Sx \&Fn  Ta    Yes      Ta    Yes      Ta    >0
 .It Sx \&Fr  Ta    \&No     Ta    \&No     Ta    n
 .It Sx \&Fd  Ta    \&No     Ta    \&No     Ta    >0
 .It Sx \&Fl  Ta    Yes      Ta    Yes      Ta    n
 .It Sx \&Fn  Ta    Yes      Ta    Yes      Ta    >0
 .It Sx \&Fr  Ta    \&No     Ta    \&No     Ta    n

-.It Sx \&Ft  Ta    Yes      Ta    Yes      Ta    n
+.It Sx \&Ft  Ta    Yes      Ta    Yes      Ta    >0

 .It Sx \&Fx  Ta    Yes      Ta    Yes      Ta    n
 .It Sx \&Hf  Ta    \&No     Ta    \&No     Ta    n
 .It Sx \&Ic  Ta    Yes      Ta    Yes      Ta    >0
 .It Sx \&Fx  Ta    Yes      Ta    Yes      Ta    n
 .It Sx \&Hf  Ta    \&No     Ta    \&No     Ta    n
 .It Sx \&Ic  Ta    Yes      Ta    Yes      Ta    >0

-.It Sx \&In  Ta    \&No     Ta    \&No     Ta    n
+.It Sx \&In  Ta    \&No     Ta    \&No     Ta    1

 .It Sx \&Lb  Ta    \&No     Ta    \&No     Ta    1
 .It Sx \&Lb  Ta    \&No     Ta    \&No     Ta    1

-.It Sx \&Li  Ta    Yes      Ta    Yes      Ta    n
-.It Sx \&Lk  Ta    Yes      Ta    Yes      Ta    n
+.It Sx \&Li  Ta    Yes      Ta    Yes      Ta    >0
+.It Sx \&Lk  Ta    Yes      Ta    Yes      Ta    >0

 .It Sx \&Lp  Ta    \&No     Ta    \&No     Ta    0
 .It Sx \&Ms  Ta    Yes      Ta    Yes      Ta    >0
 .It Sx \&Mt  Ta    Yes      Ta    Yes      Ta    >0
 .It Sx \&Lp  Ta    \&No     Ta    \&No     Ta    0
 .It Sx \&Ms  Ta    Yes      Ta    Yes      Ta    >0
 .It Sx \&Mt  Ta    Yes      Ta    Yes      Ta    >0


@@ -884,8 +881,10 @@ block.
 Publication date of an
 .Sx \&Rs
 block.
 Publication date of an
 .Sx \&Rs
 block.

-This should follow the reduced or canonical form syntax described in
-.Sx Dates .
+Recommended formats of arguments are
+.Ar month day , year
+or just
+.Ar year .

 .Ss \&%I
 Publisher or issuer name of an
 .Sx \&Rs
 .Ss \&%I
 Publisher or issuer name of an
 .Sx \&Rs


@@ -1061,7 +1060,7 @@ Its syntax is as follows:
 .Pp
 Display blocks are used to select a different indentation and
 justification than the one used by the surrounding text.
 .Pp
 Display blocks are used to select a different indentation and
 justification than the one used by the surrounding text.

-They may contain both macro lines and free-form text lines.
+They may contain both macro lines and text lines.

 By default, a display block is preceded by a vertical space.
 .Pp
 The
 By default, a display block is preceded by a vertical space.
 .Pp
 The


@@ -1176,9 +1175,10 @@ See also
 and
 .Sx \&Sy .
 .Ss \&Bk
 and
 .Sx \&Sy .
 .Ss \&Bk

-Keep the output generated from each macro input line together
-on one single output line.
-Line breaks in free-form text lines are unaffected.
+For each macro, keep its output together on the same output line,
+until the end of the macro or the end of the input line is reached,
+whichever comes first.
+Line breaks in text lines are unaffected.

 The syntax is as follows:
 .Pp
 .D1 Pf \. Sx \&Bk Fl words
 The syntax is as follows:
 .Pp
 .D1 Pf \. Sx \&Bk Fl words


@@ -1467,17 +1467,36 @@ This is the mandatory first macro of any
 manual.
 Its syntax is as follows:
 .Pp
 manual.
 Its syntax is as follows:
 .Pp

-.D1 Pf \. Sx \&Dd Op Ar date
+.D1 Pf \. Sx \&Dd Ar month day , year

 .Pp
 The
 .Pp
 The

-.Ar date
-may be either
-.Ar $\&Mdocdate$ ,
-which signifies the current manual revision date dictated by
+.Ar month
+is the full English month name, the
+.Ar day
+is an optionally zero-padded numeral, and the
+.Ar year
+is the full four-digit year.
+.Pp
+Other arguments are not portable; the
+.Xr mandoc 1
+utility handles them as follows:
+.Bl -dash -offset 3n -compact
+.It
+To have the date automatically filled in by the
+.Ox
+version of

 .Xr cvs 1 ,
 .Xr cvs 1 ,

-or instead a valid canonical date as specified by
-.Sx Dates .
-If a date does not conform or is empty, the current date is used.
+the special string
+.Dq $\&Mdocdate$
+can be given as an argument.
+.It
+A few alternative date formats are accepted as well
+and converted to the standard form.
+.It
+If a date string cannot be parsed, it is used verbatim.
+.It
+If no date string is given, the current date is used.
+.El

 .Pp
 Examples:
 .Dl \&.Dd $\&Mdocdate$
 .Pp
 Examples:
 .Dl \&.Dd $\&Mdocdate$


@@ -1853,9 +1872,9 @@ A function name.
 Its syntax is as follows:
 .Bd -ragged -offset indent
 .Pf \. Ns Sx \&Fn
 Its syntax is as follows:
 .Bd -ragged -offset indent
 .Pf \. Ns Sx \&Fn

-.Op Cm functype
-.Cm funcname
-.Op Oo Cm argtype Oc Cm argname
+.Op Ar functype
+.Ar funcname
+.Op Oo Ar argtype Oc Ar argname

 .Ed
 .Pp
 Function arguments are surrounded in parenthesis and
 .Ed
 .Pp
 Function arguments are surrounded in parenthesis and


@@ -1863,8 +1882,8 @@ are delimited by commas.
 If no arguments are specified, blank parenthesis are output.
 .Pp
 Examples:
 If no arguments are specified, blank parenthesis are output.
 .Pp
 Examples:

-.Dl \&.Fn "int funcname" "int arg0" "int arg1"
-.Dl \&.Fn funcname "int arg0"
+.Dl \&.Fn \*qint funcname\*q \*qint arg0\*q \*qint arg1\*q
+.Dl \&.Fn funcname \*qint arg0\*q

 .Dl \&.Fn funcname arg0
 .Bd -literal -offset indent -compact
 \&.Ft functype
 .Dl \&.Fn funcname arg0
 .Bd -literal -offset indent -compact
 \&.Ft functype


@@ -1884,17 +1903,17 @@ This is a multi-line version of
 .Sx \&Fn .
 Its syntax is as follows:
 .Pp
 .Sx \&Fn .
 Its syntax is as follows:
 .Pp

-.D1 Pf \. Sx \&Fo Cm funcname
+.D1 Pf \. Sx \&Fo Ar funcname

 .Pp
 Invocations usually occur in the following context:
 .Bd -ragged -offset indent
 .Pp
 Invocations usually occur in the following context:
 .Bd -ragged -offset indent

-.Pf \. Sx \&Ft Cm functype
+.Pf \. Sx \&Ft Ar functype

 .br
 .br

-.Pf \. Sx \&Fo Cm funcname
+.Pf \. Sx \&Fo Ar funcname

 .br
 .br

-.Pf \. Sx \&Fa Oo Cm argtype Oc Cm argname
+.Pf \. Sx \&Fa Oo Ar argtype Oc Ar argname

 .br
 .br

-\.\.\.
+\&.\.\.

 .br
 .Pf \. Sx \&Fc
 .Ed
 .br
 .Pf \. Sx \&Fc
 .Ed


@@ -1913,7 +1932,7 @@ and
 A function type.
 Its syntax is as follows:
 .Pp
 A function type.
 Its syntax is as follows:
 .Pp

-.D1 Pf \. Sx \&Ft Cm functype
+.D1 Pf \. Sx \&Ft Ar functype

 .Pp
 Examples:
 .Dl \&.Ft int
 .Pp
 Examples:
 .Dl \&.Ft int


@@ -1994,7 +2013,7 @@ and
 .Fl diag
 have the following syntax:
 .Pp
 .Fl diag
 have the following syntax:
 .Pp

-.D1 Pf \. Sx \&It Cm args
+.D1 Pf \. Sx \&It Ar args

 .Pp
 Lists of type
 .Fl bullet ,
 .Pp
 Lists of type
 .Fl bullet ,


@@ -2067,14 +2086,14 @@ See also
 Specify a library.
 The syntax is as follows:
 .Pp
 Specify a library.
 The syntax is as follows:
 .Pp

-.D1 Pf \. Sx \&Lb Cm library
+.D1 Pf \. Sx \&Lb Ar library

 .Pp
 The
 .Pp
 The

-.Cm library
+.Ar library

 parameter may be a system library, such as
 parameter may be a system library, such as

-.Cm libz
+.Ar libz

 or
 or

-.Cm libpam ,
+.Ar libpam ,

 in which case a small library description is printed next to the linker
 invocation; or a custom library, in which case the library name is
 printed in quotes.
 in which case a small library description is printed next to the linker
 invocation; or a custom library, in which case the library name is
 printed in quotes.


@@ -2100,7 +2119,7 @@ and
 Format a hyperlink.
 Its syntax is as follows:
 .Pp
 Format a hyperlink.
 Its syntax is as follows:
 .Pp

-.D1 Pf \. Sx \&Lk Cm uri Op Cm name
+.D1 Pf \. Sx \&Lk Ar uri Op Ar name

 .Pp
 Examples:
 .Dl \&.Lk http://bsd.lv \*qThe BSD.lv Project\*q
 .Pp
 Examples:
 .Dl \&.Lk http://bsd.lv \*qThe BSD.lv Project\*q


@@ -2115,7 +2134,7 @@ Synonym for
 Display a mathematical symbol.
 Its syntax is as follows:
 .Pp
 Display a mathematical symbol.
 Its syntax is as follows:
 .Pp

-.D1 Pf \. Sx \&Ms Cm symbol
+.D1 Pf \. Sx \&Ms Ar symbol

 .Pp
 Examples:
 .Dl \&.Ms sigma
 .Pp
 Examples:
 .Dl \&.Ms sigma


@@ -2126,7 +2145,7 @@ Format a
 hyperlink.
 Its syntax is as follows:
 .Pp
 hyperlink.
 Its syntax is as follows:
 .Pp

-.D1 Pf \. Sx \&Mt Cm address
+.D1 Pf \. Sx \&Mt Ar address

 .Pp
 Examples:
 .Dl \&.Mt discuss@manpages.bsd.lv
 .Pp
 Examples:
 .Dl \&.Mt discuss@manpages.bsd.lv


@@ -2203,6 +2222,8 @@ Suppress a space.
 Following invocation, text is interpreted as free-form text until a
 macro is encountered.
 .Pp
 Following invocation, text is interpreted as free-form text until a
 macro is encountered.
 .Pp

+This has no effect when invoked at the start of a macro line.
+.Pp

 Examples:
 .Dl \&.Fl o \&Ns \&Ar output
 .Pp
 Examples:
 .Dl \&.Fl o \&Ns \&Ar output
 .Pp


@@ -2262,10 +2283,10 @@ any
 file.
 Its syntax is as follows:
 .Pp
 file.
 Its syntax is as follows:
 .Pp

-.D1 Pf \. Sx \&Os Op Cm system Op Cm version
+.D1 Pf \. Sx \&Os Op Ar system Op Ar version

 .Pp
 The optional
 .Pp
 The optional

-.Cm system
+.Ar system

 parameter specifies the relevant operating system or environment.
 Left unspecified, it defaults to the local operating system version.
 This is the suggested form.
 parameter specifies the relevant operating system or environment.
 Left unspecified, it defaults to the local operating system version.
 This is the suggested form.


@@ -2324,14 +2345,14 @@ Removes the space
 between its arguments.
 Its syntax is as follows:
 .Pp
 between its arguments.
 Its syntax is as follows:
 .Pp

-.D1 Pf \. \&Pf Cm prefix suffix
+.D1 Pf \. \&Pf Ar prefix suffix

 .Pp
 The
 .Pp
 The

-.Cm suffix
+.Ar suffix

 argument may be a macro.
 .Pp
 Examples:
 argument may be a macro.
 .Pp
 Examples:

-.Dl \&.Pf \e. \&Sx \&Pf \&Cm prefix suffix
+.Dl \&.Pf \e. \&Sx \&Pf \&Ar prefix suffix

 .Ss \&Po
 Multi-line version of
 .Sx \&Pq .
 .Ss \&Po
 Multi-line version of
 .Sx \&Pq .


@@ -2452,11 +2473,11 @@ Its syntax is as follows:
 .D1 Pf \. Sx \&Sm Cm on | off
 .Pp
 By default, spacing is
 .D1 Pf \. Sx \&Sm Cm on | off
 .Pp
 By default, spacing is

-.Cm on .
+.Ar on .

 When switched
 When switched

-.Cm off ,
+.Ar off ,

 no white space is inserted between macro arguments and between the
 no white space is inserted between macro arguments and between the

-output generated from adjacent macros, but free-form text lines
+output generated from adjacent macros, but text lines

 still get normal spacing between words and sentences.
 .Ss \&So
 Multi-line version of
 still get normal spacing between words and sentences.
 .Ss \&So
 Multi-line version of


@@ -2679,15 +2700,15 @@ Link to another manual
 .Pq Qq cross-reference .
 Its syntax is as follows:
 .Pp
 .Pq Qq cross-reference .
 Its syntax is as follows:
 .Pp

-.D1 Pf \. Sx \&Xr Cm name section
+.D1 Pf \. Sx \&Xr Ar name section

 .Pp
 The
 .Pp
 The

-.Cm name
+.Ar name

 and
 and

-.Cm section
+.Ar section

 are the name and section of the linked manual.
 If
 are the name and section of the linked manual.
 If

-.Cm section
+.Ar section

 is followed by non-punctuation, an
 .Sx \&Ns
 is inserted into the token stream.
 is followed by non-punctuation, an
 .Sx \&Ns
 is inserted into the token stream.


@@ -2712,10 +2733,10 @@ This macro should not be used; it is implemented for compatibility with
 historical manuals.
 Its syntax is as follows:
 .Pp
 historical manuals.
 Its syntax is as follows:
 .Pp

-.D1 Pf \. Sx \&sp Op Cm height
+.D1 Pf \. Sx \&sp Op Ar height

 .Pp
 The
 .Pp
 The

-.Cm height
+.Ar height

 argument must be formatted as described in
 .Sx Scaling Widths .
 If unspecified,
 argument must be formatted as described in
 .Sx Scaling Widths .
 If unspecified,


@@ -2767,9 +2788,12 @@ does not start a new line.
 \*[hist]
 .It
 .Sx \&Dd
 \*[hist]
 .It
 .Sx \&Dd

-without an argument prints
-.Dq Epoch .
-In mandoc, it resolves to the current date.
+with non-standard arguments behaves very strangely.
+When there are three arguments, they are printed verbatim.
+Any other number of arguments is replaced by the current date,
+but without any arguments the string
+.Dq Epoch
+is printed.

 .It
 .Sx \&Fl
 does not print a dash for an empty argument.
 .It
 .Sx \&Fl
 does not print a dash for an empty argument.


@@ -2903,6 +2927,7 @@ This is not supported by mandoc.
 .Sh SEE ALSO
 .Xr man 1 ,
 .Xr mandoc 1 ,
 .Sh SEE ALSO
 .Xr man 1 ,
 .Xr mandoc 1 ,

+.Xr eqn 7 ,

 .Xr man 7 ,
 .Xr mandoc_char 7
 .Xr roff 7 ,
 .Xr man 7 ,
 .Xr mandoc_char 7
 .Xr roff 7 ,