Deprecate .Tn and .Ux, and make it clearer that .Bt and .Ud are deprecated.

[mandoc.git] / mdoc.7

diff --git a/mdoc.7 b/mdoc.7
index cd1e2e89502286ee6551086e074a695c1ebc496a..0706a19b7b01506fd3efa56cee7f160e94491b89 100644 (file)
--- a/mdoc.7
+++ b/mdoc.7
@@ -1,4 +1,4 @@
-.\"    $Id: mdoc.7,v 1.224 2013/12/31 23:29:41 schwarze Exp $
+.\"    $Id: mdoc.7,v 1.230 2014/06/24 21:43:08 schwarze Exp $

 .\"
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010, 2011, 2013 Ingo Schwarze <schwarze@openbsd.org>
 .\"
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010, 2011, 2013 Ingo Schwarze <schwarze@openbsd.org>


@@ -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: December 31 2013 $
+.Dd $Mdocdate: June 24 2014 $

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


@@ -125,7 +125,7 @@ file for a utility
 \&.Nm progname
 \&.Nd one line about what it does
 \&.\e\(dq .Sh LIBRARY
 \&.Nm progname
 \&.Nd one line about what it does
 \&.\e\(dq .Sh LIBRARY

-\&.\e\(dq For sections 2, 3, & 9 only.
+\&.\e\(dq For sections 2, 3, and 9 only.

 \&.\e\(dq Not used in OpenBSD.
 \&.Sh SYNOPSIS
 \&.Nm progname
 \&.\e\(dq Not used in OpenBSD.
 \&.Sh SYNOPSIS
 \&.Nm progname


@@ -135,20 +135,22 @@ file for a utility
 The
 \&.Nm
 utility processes files ...
 The
 \&.Nm
 utility processes files ...

+\&.\e\(dq .Sh CONTEXT
+\&.\e\(dq For section 9 functions only.

 \&.\e\(dq .Sh IMPLEMENTATION NOTES
 \&.\e\(dq Not used in OpenBSD.
 \&.\e\(dq .Sh RETURN VALUES
 \&.\e\(dq .Sh IMPLEMENTATION NOTES
 \&.\e\(dq Not used in OpenBSD.
 \&.\e\(dq .Sh RETURN VALUES

-\&.\e\(dq For sections 2, 3, & 9 only.
+\&.\e\(dq For sections 2, 3, and 9 function return values only.

 \&.\e\(dq .Sh ENVIRONMENT
 \&.\e\(dq .Sh ENVIRONMENT

-\&.\e\(dq For sections 1, 6, 7, & 8 only.
+\&.\e\(dq For sections 1, 6, 7, and 8 only.

 \&.\e\(dq .Sh FILES
 \&.\e\(dq .Sh EXIT STATUS
 \&.\e\(dq .Sh FILES
 \&.\e\(dq .Sh EXIT STATUS

-\&.\e\(dq For sections 1, 6, & 8 only.
+\&.\e\(dq For sections 1, 6, and 8 only.

 \&.\e\(dq .Sh EXAMPLES
 \&.\e\(dq .Sh DIAGNOSTICS
 \&.\e\(dq .Sh EXAMPLES
 \&.\e\(dq .Sh DIAGNOSTICS

-\&.\e\(dq For sections 1, 4, 6, 7, & 8 only.
+\&.\e\(dq For sections 1, 4, 6, 7, 8, and 9 printf/stderr messages only.

 \&.\e\(dq .Sh ERRORS
 \&.\e\(dq .Sh ERRORS

-\&.\e\(dq For sections 2, 3, & 9 only.
+\&.\e\(dq For sections 2, 3, 4, and 9 errno settings only.

 \&.\e\(dq .Sh SEE ALSO
 \&.\e\(dq .Xr foobar 1
 \&.\e\(dq .Sh STANDARDS
 \&.\e\(dq .Sh SEE ALSO
 \&.\e\(dq .Xr foobar 1
 \&.\e\(dq .Sh STANDARDS


@@ -318,6 +320,9 @@ macro followed by a non-standard section name, and each having
 several subsections, like in the present
 .Nm
 manual.
 several subsections, like in the present
 .Nm
 manual.

+.It Em CONTEXT
+This section lists the contexts in which functions can be called in section 9.
+The contexts are autoconf, process, or interrupt.

 .It Em IMPLEMENTATION NOTES
 Implementation-specific notes should be kept here.
 This is useful when implementing standard functions that may have side
 .It Em IMPLEMENTATION NOTES
 Implementation-specific notes should be kept here.
 This is useful when implementing standard functions that may have side


@@ -358,8 +363,12 @@ Example usages.
 This often contains snippets of well-formed, well-tested invocations.
 Make sure that examples work properly!
 .It Em DIAGNOSTICS
 This often contains snippets of well-formed, well-tested invocations.
 Make sure that examples work properly!
 .It Em DIAGNOSTICS

-Documents error conditions.
-This is most useful in section 4 manuals.
+Documents error messages.
+In section 4 and 9 manuals, these are usually messages printed by the
+kernel to the console and to the kernel log.
+In section 1, 6, 7, and 8, these are usually messages printed by
+userland programs to the standard error output.
+.Pp

 Historically, this section was used in place of
 .Em EXIT STATUS
 for manuals in sections 1, 6, and 8; however, this practise is
 Historically, this section was used in place of
 .Em EXIT STATUS
 for manuals in sections 1, 6, and 8; however, this practise is


@@ -369,7 +378,9 @@ See
 .Sx \&Bl
 .Fl diag .
 .It Em ERRORS
 .Sx \&Bl
 .Fl diag .
 .It Em ERRORS

-Documents error handling in sections 2, 3, and 9.
+Documents
+.Xr errno 2
+settings in sections 2, 3, 4, and 9.

 .Pp
 See
 .Sx \&Er .
 .Pp
 See
 .Sx \&Er .


@@ -502,7 +513,6 @@ in the alphabetical
 .It Sx \&Cd Ta kernel configuration declaration (>0 arguments)
 .It Sx \&Ad Ta memory address (>0 arguments)
 .It Sx \&Ms Ta mathematical symbol (>0 arguments)
 .It Sx \&Cd Ta kernel configuration declaration (>0 arguments)
 .It Sx \&Ad Ta memory address (>0 arguments)
 .It Sx \&Ms Ta mathematical symbol (>0 arguments)

-.It Sx \&Tn Ta tradename (>0 arguments)

 .El
 .Ss Physical markup
 .Bl -column "Brq, Bro, Brc" description
 .El
 .Ss Physical markup
 .Bl -column "Brq, Bro, Brc" description


@@ -530,7 +540,6 @@ in the alphabetical
 .It Sx \&Ex Fl std Ta standard command exit values: Op Ar utility ...
 .It Sx \&Rv Fl std Ta standard function return values: Op Ar function ...
 .It Sx \&St Ta reference to a standards document (one argument)
 .It Sx \&Ex Fl std Ta standard command exit values: Op Ar utility ...
 .It Sx \&Rv Fl std Ta standard function return values: Op Ar function ...
 .It Sx \&St Ta reference to a standards document (one argument)

-.It Sx \&Ux Ta Ux

 .It Sx \&At Ta At
 .It Sx \&Bx Ta Bx
 .It Sx \&Bsx Ta Bsx
 .It Sx \&At Ta At
 .It Sx \&Bx Ta Bx
 .It Sx \&Bsx Ta Bsx


@@ -741,9 +750,8 @@ See also
 .Sx \&Dx ,
 .Sx \&Fx ,
 .Sx \&Nx ,
 .Sx \&Dx ,
 .Sx \&Fx ,
 .Sx \&Nx ,

-.Sx \&Ox ,

 and
 and

-.Sx \&Ux .
+.Sx \&Ox .

 .Ss \&Bc
 Close a
 .Sx \&Bo
 .Ss \&Bc
 Close a
 .Sx \&Bo


@@ -1107,10 +1115,10 @@ See also
 .Sx \&Dx ,
 .Sx \&Fx ,
 .Sx \&Nx ,
 .Sx \&Dx ,
 .Sx \&Fx ,
 .Sx \&Nx ,

-.Sx \&Ox ,

 and
 and

-.Sx \&Ux .
+.Sx \&Ox .

 .Ss \&Bt
 .Ss \&Bt

+Supported only for compatibility, do not use this in new manuals.

 Prints
 .Dq is currently in beta test.
 .Ss \&Bx
 Prints
 .Dq is currently in beta test.
 .Ss \&Bx


@@ -1130,9 +1138,8 @@ See also
 .Sx \&Dx ,
 .Sx \&Fx ,
 .Sx \&Nx ,
 .Sx \&Dx ,
 .Sx \&Fx ,
 .Sx \&Nx ,

-.Sx \&Ox ,

 and
 and

-.Sx \&Ux .
+.Sx \&Ox .

 .Ss \&Cd
 Kernel configuration declaration.
 This denotes strings accepted by
 .Ss \&Cd
 Kernel configuration declaration.
 This denotes strings accepted by


@@ -1305,70 +1312,70 @@ It should be capitalised.
 .It Ar section
 The manual section.
 This may be one of
 .It Ar section
 The manual section.
 This may be one of

-.Ar 1
+.Cm 1

 .Pq utilities ,
 .Pq utilities ,

-.Ar 2
+.Cm 2

 .Pq system calls ,
 .Pq system calls ,

-.Ar 3
+.Cm 3

 .Pq libraries ,
 .Pq libraries ,

-.Ar 3p
+.Cm 3p

 .Pq Perl libraries ,
 .Pq Perl libraries ,

-.Ar 4
+.Cm 4

 .Pq devices ,
 .Pq devices ,

-.Ar 5
+.Cm 5

 .Pq file formats ,
 .Pq file formats ,

-.Ar 6
+.Cm 6

 .Pq games ,
 .Pq games ,

-.Ar 7
+.Cm 7

 .Pq miscellaneous ,
 .Pq miscellaneous ,

-.Ar 8
+.Cm 8

 .Pq system utilities ,
 .Pq system utilities ,

-.Ar 9
+.Cm 9

 .Pq kernel functions ,
 .Pq kernel functions ,

-.Ar X11
+.Cm X11

 .Pq X Window System ,
 .Pq X Window System ,

-.Ar X11R6
+.Cm X11R6

 .Pq X Window System ,
 .Pq X Window System ,

-.Ar unass
+.Cm unass

 .Pq unassociated ,
 .Pq unassociated ,

-.Ar local
+.Cm local

 .Pq local system ,
 .Pq local system ,

-.Ar draft
+.Cm draft

 .Pq draft manual ,
 or
 .Pq draft manual ,
 or

-.Ar paper
+.Cm paper

 .Pq paper .
 It should correspond to the manual's filename suffix and defaults to
 .Pq paper .
 It should correspond to the manual's filename suffix and defaults to

-.Dq 1
+.Cm 1

 if unspecified.
 .It Ar volume
 This overrides the volume inferred from
 .Ar section .
 This field is optional, and if specified, must be one of
 if unspecified.
 .It Ar volume
 This overrides the volume inferred from
 .Ar section .
 This field is optional, and if specified, must be one of

-.Ar USD
+.Cm USD

 .Pq users' supplementary documents ,
 .Pq users' supplementary documents ,

-.Ar PS1
+.Cm PS1

 .Pq programmers' supplementary documents ,
 .Pq programmers' supplementary documents ,

-.Ar AMD
+.Cm AMD

 .Pq administrators' supplementary documents ,
 .Pq administrators' supplementary documents ,

-.Ar SMM
+.Cm SMM

 .Pq system managers' manuals ,
 .Pq system managers' manuals ,

-.Ar URM
+.Cm URM

 .Pq users' reference manuals ,
 .Pq users' reference manuals ,

-.Ar PRM
+.Cm PRM

 .Pq programmers' reference manuals ,
 .Pq programmers' reference manuals ,

-.Ar KM
+.Cm KM

 .Pq kernel manuals ,
 .Pq kernel manuals ,

-.Ar IND
+.Cm IND

 .Pq master index ,
 .Pq master index ,

-.Ar MMI
+.Cm MMI

 .Pq master index ,
 .Pq master index ,

-.Ar LOCAL
+.Cm LOCAL

 .Pq local manuals ,
 .Pq local manuals ,

-.Ar LOC
+.Cm LOC

 .Pq local manuals ,
 or
 .Pq local manuals ,
 or

-.Ar CON
+.Cm CON

 .Pq contributed manuals .
 .It Ar arch
 This specifies the machine architecture a manual page applies to,
 .Pq contributed manuals .
 .It Ar arch
 This specifies the machine architecture a manual page applies to,


@@ -1430,9 +1437,8 @@ See also
 .Sx \&Bx ,
 .Sx \&Fx ,
 .Sx \&Nx ,
 .Sx \&Bx ,
 .Sx \&Fx ,
 .Sx \&Nx ,

-.Sx \&Ox ,

 and
 and

-.Sx \&Ux .
+.Sx \&Ox .

 .Ss \&Ec
 Close a scope started by
 .Sx \&Eo .
 .Ss \&Ec
 Close a scope started by
 .Sx \&Eo .


@@ -1481,7 +1487,7 @@ See also
 and
 .Sx \&Sy .
 .Ss \&En
 and
 .Sx \&Sy .
 .Ss \&En

-This macro is obsolete and not implemented in
+This macro is obsolete and ignored by

 .Xr mandoc 1 .
 .Ss \&Eo
 An arbitrary enclosure.
 .Xr mandoc 1 .
 .Ss \&Eo
 An arbitrary enclosure.


@@ -1508,7 +1514,8 @@ See also
 .Sx \&Dv
 for general constants.
 .Ss \&Es
 .Sx \&Dv
 for general constants.
 .Ss \&Es

-This macro is obsolete and not implemented.
+This macro is obsolete and ignored by
+.Xr mandoc 1 .

 .Ss \&Ev
 Environmental variables such as those specified in
 .Xr environ 7 .
 .Ss \&Ev
 Environmental variables such as those specified in
 .Xr environ 7 .


@@ -1688,7 +1695,7 @@ See also
 and
 .Sx \&Ft .
 .Ss \&Fr
 and
 .Sx \&Ft .
 .Ss \&Fr

-This macro is obsolete and not implemented in
+This macro is obsolete and ignored by

 .Xr mandoc 1 .
 .Pp
 It was used to show function return values.
 .Xr mandoc 1 .
 .Pp
 It was used to show function return values.


@@ -1733,9 +1740,8 @@ See also
 .Sx \&Bx ,
 .Sx \&Dx ,
 .Sx \&Nx ,
 .Sx \&Bx ,
 .Sx \&Dx ,
 .Sx \&Nx ,

-.Sx \&Ox ,

 and
 and

-.Sx \&Ux .
+.Sx \&Ox .

 .Ss \&Hf
 This macro is not implemented in
 .Xr mandoc 1 .
 .Ss \&Hf
 This macro is not implemented in
 .Xr mandoc 1 .


@@ -2053,9 +2059,8 @@ See also
 .Sx \&Bx ,
 .Sx \&Dx ,
 .Sx \&Fx ,
 .Sx \&Bx ,
 .Sx \&Dx ,
 .Sx \&Fx ,

-.Sx \&Ox ,

 and
 and

-.Sx \&Ux .
+.Sx \&Ox .

 .Ss \&Oc
 Close multi-line
 .Sx \&Oo
 .Ss \&Oc
 Close multi-line
 .Sx \&Oo


@@ -2109,7 +2114,7 @@ See also
 and
 .Sx \&Dt .
 .Ss \&Ot
 and
 .Sx \&Dt .
 .Ss \&Ot

-This macro is obsolete and not implemented in
+This macro is obsolete and ignored by

 .Xr mandoc 1 .
 .Pp
 Historical
 .Xr mandoc 1 .
 .Pp
 Historical


@@ -2132,9 +2137,8 @@ See also
 .Sx \&Bx ,
 .Sx \&Dx ,
 .Sx \&Fx ,
 .Sx \&Bx ,
 .Sx \&Dx ,
 .Sx \&Fx ,

-.Sx \&Nx ,

 and
 and

-.Sx \&Ux .
+.Sx \&Nx .

 .Ss \&Pa
 An absolute or relative file system path, or a file or directory name.
 If an argument is not provided, the character
 .Ss \&Pa
 An absolute or relative file system path, or a file or directory name.
 If an argument is not provided, the character


@@ -2354,115 +2358,243 @@ and
 .Sx \&Sx .
 .Ss \&St
 Replace an abbreviation for a standard with the full form.
 .Sx \&Sx .
 .Ss \&St
 Replace an abbreviation for a standard with the full form.

-The following standards are recognised:
-.Pp
-.Bl -tag -width "-p1003.1g-2000X" -compact
-.It \-p1003.1-88
-.St -p1003.1-88
-.It \-p1003.1-90
-.St -p1003.1-90
-.It \-p1003.1-96
-.St -p1003.1-96
-.It \-p1003.1-2001
-.St -p1003.1-2001
-.It \-p1003.1-2004
-.St -p1003.1-2004
-.It \-p1003.1-2008
-.St -p1003.1-2008
-.It \-p1003.1-2013
-.St -p1003.1-2013
-.It \-p1003.1
-.St -p1003.1
-.It \-p1003.1b
-.St -p1003.1b
-.It \-p1003.1b-93
-.St -p1003.1b-93
-.It \-p1003.1c-95
-.St -p1003.1c-95
-.It \-p1003.1d-99
-.St -p1003.1d-99
-.It \-p1003.1g-2000
-.St -p1003.1g-2000
-.It \-p1003.1i-95
-.St -p1003.1i-95
-.It \-p1003.1j-2000
-.St -p1003.1j-2000
-.It \-p1003.1q-2000
-.St -p1003.1q-2000
-.It \-p1003.2
-.St -p1003.2
-.It \-p1003.2-92
-.St -p1003.2-92
-.It \-p1003.2a-92
-.St -p1003.2a-92
-.It \-p1387.2
-.St -p1387.2
-.It \-p1387.2-95
-.St -p1387.2-95
+The following standards are recognised.
+Where multiple lines are given without a blank line in between,
+they all refer to the same standard, and using the first form
+is recommended.
+.Bl -tag -width 1n
+.It C language standards
+.Pp
+.Bl -tag -width "-p1003.1g-2000" -compact
+.It \-ansiC
+.St -ansiC
+.It \-ansiC-89
+.St -ansiC-89

 .It \-isoC
 .St -isoC
 .It \-isoC-90
 .St -isoC-90
 .It \-isoC
 .St -isoC
 .It \-isoC-90
 .St -isoC-90

+.br
+The original C standard.
+.Pp

 .It \-isoC-amd1
 .St -isoC-amd1
 .It \-isoC-amd1
 .St -isoC-amd1

+.Pp

 .It \-isoC-tcor1
 .St -isoC-tcor1
 .It \-isoC-tcor1
 .St -isoC-tcor1

+.Pp

 .It \-isoC-tcor2
 .St -isoC-tcor2
 .It \-isoC-tcor2
 .St -isoC-tcor2

+.Pp

 .It \-isoC-99
 .St -isoC-99
 .It \-isoC-99
 .St -isoC-99

+.It \-ansiC-99
+.St -ansiC-99
+.br
+The second major version of the C language standard.
+.Pp

 .It \-isoC-2011
 .St -isoC-2011
 .It \-isoC-2011
 .St -isoC-2011

+.br
+The third major version of the C language standard.
+.El
+.It POSIX.1 before the Single UNIX Specification
+.Pp
+.Bl -tag -width "-p1003.1g-2000" -compact
+.It \-p1003.1-88
+.St -p1003.1-88
+.It \-p1003.1
+.St -p1003.1
+.br
+The original POSIX standard, based on ANSI C.
+.Pp
+.It \-p1003.1-90
+.St -p1003.1-90

 .It \-iso9945-1-90
 .St -iso9945-1-90
 .It \-iso9945-1-90
 .St -iso9945-1-90

+.br
+The first update of POSIX.1.
+.Pp
+.It \-p1003.1b-93
+.St -p1003.1b-93
+.It \-p1003.1b
+.St -p1003.1b
+.br
+Real-time extensions.
+.Pp
+.It \-p1003.1c-95
+.St -p1003.1c-95
+.br
+POSIX thread interfaces.
+.Pp
+.It \-p1003.1i-95
+.St -p1003.1i-95
+.br
+Technical Corrigendum.
+.Pp
+.It \-p1003.1-96
+.St -p1003.1-96

 .It \-iso9945-1-96
 .St -iso9945-1-96
 .It \-iso9945-1-96
 .St -iso9945-1-96

-.It \-iso9945-2-93
-.St -iso9945-2-93
-.It \-ansiC
-.St -ansiC
-.It \-ansiC-89
-.St -ansiC-89
-.It \-ansiC-99
-.St -ansiC-99
-.It \-ieee754
-.St -ieee754
-.It \-iso8802-3
-.St -iso8802-3
-.It \-iso8601
-.St -iso8601
-.It \-ieee1275-94
-.St -ieee1275-94
+.br
+Includes POSIX.1-1990, 1b, 1c, and 1i.
+.El
+.It X/Open Portability Guide version 4 and related standards
+.Pp
+.Bl -tag -width "-p1003.1g-2000" -compact

 .It \-xpg3
 .St -xpg3
 .It \-xpg3
 .St -xpg3

+.br
+An XPG4 precursor, published in 1989.
+.Pp
+.It \-p1003.2
+.St -p1003.2
+.It \-p1003.2-92
+.St -p1003.2-92
+.It \-iso9945-2-93
+.St -iso9945-2-93
+.br
+An XCU4 precursor.
+.Pp
+.It \-p1003.2a-92
+.St -p1003.2a-92
+.br
+Updates to POSIX.2.
+.Pp

 .It \-xpg4
 .St -xpg4
 .It \-xpg4
 .St -xpg4

+.br
+Based on POSIX.1 and POSIX.2, published in 1992.
+.El
+.It Single UNIX Specification version 1 and related standards
+.Pp
+.Bl -tag -width "-p1003.1g-2000" -compact

 .It \-xpg4.2
 .St -xpg4.2
 .It \-xpg4.2
 .St -xpg4.2

+.br
+This standard was published in 1994 and is also called SUSv1.
+It was used as the basis for UNIX 95 certification.
+The following three refer to parts of it.
+.Pp
+.It \-xsh4.2
+.St -xsh4.2
+.Pp
+.It \-xcurses4.2
+.St -xcurses4.2
+.Pp
+.It \-p1003.1g-2000
+.St -p1003.1g-2000
+.br
+Networking APIs, including sockets.
+.Pp

 .It \-xpg4.3
 .St -xpg4.3
 .It \-xpg4.3
 .St -xpg4.3

+.Pp
+.It \-svid4
+.St -svid4 ,
+.br
+Published in 1995.
+.El
+.It Single UNIX Specification version 2 and related standards
+.Pp
+.Bl -tag -width "-p1003.1g-2000" -compact
+.It \-susv2
+.St -susv2
+This Standard was published in 1997
+and is also called X/Open Portability Guide version 5.
+It was used as the basis for UNIX 98 certification.
+The following refer to parts of it.
+.Pp

 .It \-xbd5
 .St -xbd5
 .It \-xbd5
 .St -xbd5

-.It \-xcu5
-.St -xcu5
-.It \-xsh4.2
-.St -xsh4.2
+.Pp

 .It \-xsh5
 .St -xsh5
 .It \-xsh5
 .St -xsh5

+.Pp
+.It \-xcu5
+.St -xcu5
+.Pp

 .It \-xns5
 .St -xns5
 .It \-xns5
 .St -xns5

-.It \-xns5.2
-.St -xns5.2

 .It \-xns5.2d2.0
 .St -xns5.2d2.0
 .It \-xns5.2d2.0
 .St -xns5.2d2.0

-.It \-xcurses4.2
-.St -xcurses4.2
-.It \-susv2
-.St -susv2
+.It \-xns5.2
+.St -xns5.2
+.Pp
+.It \-p1387.2
+.St -p1387.2
+.It \-p1387.2-95
+.St -p1387.2-95
+.br
+POSIX software administration.
+.El
+.It Single UNIX Specification version 3 and related standards
+.Pp
+.Bl -tag -width "-p1003.1g-2000X" -compact
+.It \-p1003.1d-99
+.St -p1003.1d-99
+.br
+Additional real-time extensions.
+.Pp
+.It \-p1003.1j-2000
+.St -p1003.1j-2000
+.br
+Advanced real-time extensions.
+.Pp
+.It \-p1003.1q-2000
+.St -p1003.1q-2000
+.br
+Amendment 7: Tracing [C Language].
+.Pp
+.It \-p1003.1-2001
+.St -p1003.1-2001

 .It \-susv3
 .St -susv3
 .It \-susv3
 .St -susv3

-.It \-svid4
-.St -svid4
+.br
+This standard is based on C99, SUSv2, POSIX.1-1996, 1d, and 1j.
+It is also called X/Open Portability Guide version 6.
+It is used as the basis for UNIX 03 certification.
+.Pp
+.It \-p1003.1-2004
+.St -p1003.1-2004
+.br
+The second and last Technical Corrigendum.
+.El
+.It Single UNIX Specification version 4
+.Pp
+.Bl -tag -width "-p1003.1g-2000" -compact
+.It \-p1003.1-2008
+.St -p1003.1-2008
+.br
+This standard is also called SUSv4 and
+X/Open Portability Guide version 7.
+.Pp
+.It \-p1003.1-2013
+.St -p1003.1-2013
+.br
+This is the first Technical Corrigendum.
+.El
+.It Other standards
+.Pp
+.Bl -tag -width "-p1003.1g-2000" -compact
+.It \-ieee754
+.St -ieee754
+.br
+Floating-point arithmetic.
+.Pp
+.It \-iso8601
+.St -iso8601
+.br
+Representation of dates and times, published in 1988.
+.Pp
+.It \-iso8802-3
+.St -iso8802-3
+.br
+Ethernet local area networks.
+.Pp
+.It \-ieee1275-94
+.St -ieee1275-94
+.El

 .El
 .Ss \&Sx
 Reference a section or subsection in the same manual page.
 .El
 .Ss \&Sx
 Reference a section or subsection in the same manual page.


@@ -2494,36 +2626,19 @@ Table cell separator in
 lists; can only be used below
 .Sx \&It .
 .Ss \&Tn
 lists; can only be used below
 .Sx \&It .
 .Ss \&Tn

-Format a tradename.
-.Pp
-Since this macro is often implemented to use a small caps font,
-it has historically been used for acronyms (like ASCII) as well.
-Such usage is not recommended because it would use the same macro
-sometimes for semantical annotation, sometimes for physical formatting.
-.Pp
-Examples:
-.Dl \&.Tn IBM
+Supported only for compatibility, do not use this in new manuals.
+Even though the macro name
+.Pq Dq tradename
+suggests a semantic function, historic usage is inconsistent, mostly
+using it as a presentation-level macro to request a small caps font.

 .Ss \&Ud
 .Ss \&Ud

+Supported only for compatibility, do not use this in new manuals.

 Prints out
 .Dq currently under development.
 .Ss \&Ux
 Prints out
 .Dq currently under development.
 .Ss \&Ux

-Format the
-.Ux
-name.
-Accepts no argument.
-.Pp
-Examples:
-.Dl \&.Ux
-.Pp
-See also
-.Sx \&At ,
-.Sx \&Bsx ,
-.Sx \&Bx ,
-.Sx \&Dx ,
-.Sx \&Fx ,
-.Sx \&Nx ,
-and
-.Sx \&Ox .
+Supported only for compatibility, do not use this in new manuals.
+Prints out
+.Dq Ux .

 .Ss \&Va
 A variable name.
 .Pp
 .Ss \&Va
 A variable name.
 .Pp


@@ -3000,8 +3115,9 @@ Manually switching the font using the
 .Ql \ef
 font escape sequences is never required.
 .Sh COMPATIBILITY
 .Ql \ef
 font escape sequences is never required.
 .Sh COMPATIBILITY

-This section documents compatibility between mandoc and other
-troff implementations, at this time limited to GNU troff
+This section provides an incomplete list of compatibility issues
+between mandoc and other troff implementations, at this time limited
+to GNU troff

 .Pq Qq groff .
 The term
 .Qq historic groff
 .Pq Qq groff .
 The term
 .Qq historic groff


@@ -3110,7 +3226,7 @@ certain list types.
 can only be called by other macros, but not at the beginning of a line.
 .It
 .Sx \&%C
 can only be called by other macros, but not at the beginning of a line.
 .It
 .Sx \&%C

-is not implemented.
+is not implemented (up to and including groff-1.22.2).

 .It
 Historic groff only allows up to eight or nine arguments per macro input
 line, depending on the exact situation.
 .It
 Historic groff only allows up to eight or nine arguments per macro input
 line, depending on the exact situation.


@@ -3128,7 +3244,7 @@ in new groff and mandoc.
 .Sq \ef
 .Pq font face
 and
 .Sq \ef
 .Pq font face
 and

-.Sq \ef
+.Sq \eF

 .Pq font family face
 .Sx Text Decoration
 escapes behave irregularly when specified within line-macro scopes.
 .Pq font family face
 .Sx Text Decoration
 escapes behave irregularly when specified within line-macro scopes.


@@ -3145,41 +3261,11 @@ The following features are unimplemented in mandoc:
 .Fl file Ar file .
 .It
 .Sx \&Bd
 .Fl file Ar file .
 .It
 .Sx \&Bd

-.Fl offset Ar center
+.Fl offset Cm center

 and
 and

-.Fl offset Ar right .
+.Fl offset Cm right .

 Groff does not implement centred and flush-right rendering either,
 but produces large indentations.
 Groff does not implement centred and flush-right rendering either,
 but produces large indentations.

-.It
-The
-.Sq \eh
-.Pq horizontal position ,
-.Sq \ev
-.Pq vertical position ,
-.Sq \em
-.Pq text colour ,
-.Sq \eM
-.Pq text filling colour ,
-.Sq \ez
-.Pq zero-length character ,
-.Sq \ew
-.Pq string length ,
-.Sq \ek
-.Pq horizontal position marker ,
-.Sq \eo
-.Pq text overstrike ,
-and
-.Sq \es
-.Pq text size
-escape sequences are all discarded in mandoc.
-.It
-The
-.Sq \ef
-scaling unit is accepted by mandoc, but rendered as the default unit.
-.It
-In quoted literals, groff allows pairwise double-quotes to produce a
-standalone double-quote in formatted output.
-This is not supported by mandoc.

 .El
 .Sh SEE ALSO
 .Xr man 1 ,
 .El
 .Sh SEE ALSO
 .Xr man 1 ,