-.\" $Id: apropos.1,v 1.22 2014/04/15 23:01:34 schwarze Exp $
+.\" $Id: apropos.1,v 1.23 2014/04/18 09:46:41 schwarze Exp $
.\"
.\" Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
.\" Copyright (c) 2011, 2012, 2014 Ingo Schwarze <schwarze@openbsd.org>
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
-.Dd $Mdocdate: April 15 2014 $
+.Dd $Mdocdate: April 18 2014 $
.Dt APROPOS 1
.Os
.Sh NAME
.Nm
utility queries manual page databases generated by
.Xr makewhatis 8 ,
-evaluating on
+evaluating
.Ar expression
for each file in each database.
+By default, it displays the names, section numbers, and description lines
+of all matching manuals.
.Pp
By default,
.Nm
searches for
.Xr makewhatis 8
databases in the default paths stipulated by
-.Xr man 1 ,
-parses terms as case-sensitive regular expressions
-.Pq the Li \&~ operator
+.Xr man 1
+and uses case-insensitive substring matching
+.Pq the Cm = No operator
over manual names and descriptions
.Pq the Li \&Nm No and Li \&Nd No macro keys .
Multiple terms imply pairwise
and
.Ar expr2
are true (logical
-.Qq and ) .
+.Sq and ) .
.It Ar expr1 Oo Fl o Oc Ar expr2
True if
.Ar expr1
and/or
.Ar expr2
evaluate to true (logical
-.Qq or ) .
+.Sq or ) .
.It Ar term
True if
.Ar term
is satisfied.
This has syntax
-.Li [key[,key]*(=~)]?val ,
-where operand
-.Cm key
+.Sm off
+.Oo
+.Op Ar key Op , Ar key ...
+.Pq Cm = | ~
+.Oc
+.Ar val
+.Sm on ,
+where
+.Ar key
is an
.Xr mdoc 7
macro to query and
-.Cm val
+.Ar val
is its value.
See
.Sx Macro Keys
for a list of available keys.
Operator
-.Li \&=
+.Cm =
evaluates a substring, while
-.Li \&~
+.Cm ~
evaluates a regular expression.
.It Fl i Ar term
If
Has no effect on substring terms.
.El
.Pp
-Results are sorted by manual title, with output formatted as
+Results are sorted by manual sections and names, with output formatted as
.Pp
-.D1 title(sec) \- description
+.D1 name[, name...](sec) \- description
.Pp
Where
-.Qq title
-is the manual's title (note multiple manual names may exist for one
-title),
-.Qq sec
+.Dq name
+is the manual's name,
+.Dq sec
is the manual section, and
-.Qq description
+.Dq description
is the manual's short description.
If an architecture is specified for the manual, it is displayed as
.Pp
-.D1 title(cat/arch) \- description
+.D1 name(sec/arch) \- description
.Pp
Resulting manuals may be accessed as
.Pp
-.Dl $ man \-s sec title
+.Dl $ man \-s sec name
.Pp
If an architecture is specified in the output, use
.Pp
-.Dl $ man \-s sec \-S arch title
+.Dl $ man \-s sec \-S arch name
.Ss Macro Keys
Queries evaluate over a subset of
.Xr mdoc 7
.Pp
.Dl $ apropos '~set.?[ug]id'
.Pp
-Search for manuals in the library category mentioning both the
+Search for manuals in the library section mentioning both the
.Qq optind
and the
.Qq optarg