===================================================================
RCS file: /cvs/mandoc/Attic/mdocml.1,v
retrieving revision 1.6
retrieving revision 1.26
diff -u -p -r1.6 -r1.26
--- mandoc/Attic/mdocml.1	2008/11/27 17:27:50	1.6
+++ mandoc/Attic/mdocml.1	2008/12/10 14:42:46	1.26
@@ -1,55 +1,142 @@
-.\"	$OpenBSD: mdocml.1,v 1.6 2008/11/27 17:27:50 kristaps Exp $
 .\"
-.\" The following requests are required for all man pages.
-.\"
-.\" Remove `\&' from the line below.
-.Dd $Mdocdate: November 27 2008 $
+.Dd $Mdocdate: December 10 2008 $
 .Dt mdocml 1
 .Os
 .\"
-.Op foo
 .Sh NAME
 .Nm mdocml
 .Nd compile manpage source into mark-up language
 .\"
 .Sh SYNOPSIS
 .Nm mdocml
-.Op Fl W
+.Op Fl v
+.Op Fl W Ns Ar err...
+.Op Fl f Ar filter
 .Op Fl o Ar outfile
 .Op Ar infile
 .\"
 .Sh DESCRIPTION
 The
 .Nm
-utility compiles manpage source into a mark-up language.  Its arguments
-are as follows:
+utility parses mdoc formatted manual source and passes results into an
+output filter.  The current output filters are
+.Fl f Ar html
+and
+.Fl f Ar xml .
+By default, 
+.Nm
+only validates its input. This may be explicitly directed with
+.Fl f Ar noop .  
+Arguments common to all filters follow:
 .Bl -tag -width "\-o outfile"
+.It Fl f Ar filter
+The output filter name.  
 .It Fl o Ar outfile
-Place output in 
+Write output to 
 .Ar outfile ,
 which may be
-.Qq \-
-for standard output.  The default is standard output.
+.Dq \-
+for stdout.  This is meaningless for
+.Fl f Ar noop .
+.It Fl W Ns Ar err...
+Print warning messages.  If set to 
+.Fl W Ns Ar all ,
+all warnings are printed; if
+.Fl W Ns Ar error ,
+warnings are considered errors and cause utility termination.  Multiple 
+.Fl W
+arguments may be comma-separated, such as
+.Fl W Ns Ar error,all .
+.It Fl v
+Make warning and error messages verbose.
 .It Ar infile
 Read input from
 .Ar infile ,
 which may be 
-.Qq \-
-for standard input.  The default is standard input.
-.It Fl W
-Print warnings.
+.Dq \-
+for stdin.
 .El
-.\" The following requests should be uncommented and used where appropriate.
-.\" This next request is for sections 2, 3, and 9 function return values only.
-.\" .Sh RETURN VALUES
-.\" This next request is for sections 1, 6, 7 & 8 only.
-.\" .Sh ENVIRONMENT
-.\" .Sh FILES
-.\" .Sh EXAMPLES
-.\" This next request is for sections 1, 4, 6, and 8 only.
-.\" .Sh DIAGNOSTICS
-.\" The next request is for sections 2, 3, and 9 error and signal handling only.
-.\" .Sh ERRORS
+.Pp
+By default,
+.Nm
+reads from stdin and writes to stdout.
+.Pp
+.Ex -std mdocml
+.\"
+.Ss Noop Filter
+The default noop 
+.Dq validating
+filter simply validates its input; it produces no output beyond error
+and warning messages.
+.\"
+.Ss XML Filter
+The XML filter, specified by
+.Fl f Ar xml ,
+produces correctly-formatted XML output.  This filter has no additional
+arguments.
+.Pp
+The XML filter creates an XML document where element names are their respective
+roff macro names.  Each element name has an associated
+namespace, which is one of 
+.Dq block ,
+.Dq head ,
+.Dq body ,
+or
+.Dq inline ,
+corresponding to the display mode of a node.  The document root is
+always the
+.Dq mdoc
+element, in the default namespace; the 
+.Dq head
+namespace is for block headers (such as 
+.Sq .Ss
+and
+.Sq .Sh ) ;
+the
+.Dq body
+namespace is for block bodies; and the
+.Dq inline
+namespace is for in-line elements (such as
+.Sq .Em ) .
+.\"
+.Ss HTML Filter
+The HTML filter, specified by
+.Fl f Ar html ,
+accepts the following filter-specific arguments:
+.Bl -tag -width "\-c css"
+.It Fl c Ar css
+The CSS file location, which defaults to 
+.Ar mdocml.css .
+.It Fl e
+Whether to embed the CSS file into the HTML prologue.
+.El
+.Pp
+By default, the HTML filter produces HTML-4.01 strict mark-up.  The
+default CSS document styles the page as it would appear in a terminal
+window.
+.\" 
+.Sh EXAMPLES
+To produce an HTML4-strict document 
+.Pa mdocml.html
+for
+.Pa mdocml.1 
+with the default, embedded style-sheet:
+.Pp
+.D1 % mdocml -fhtml -e -o mdocml.html mdocml.1 
+.Pp
+To create an XML document on standard output from
+.Pa mdocml.1
+with the default namespace identifiers
+.Li head ,
+.Li body ,
+.Li block 
+and
+.Li inline :
+.Pp
+.D1 % mdocml -Wall,error -fxml mdocml.1 
+.Pp
+The previous example will also halt on input document warnings.
+.\"
 .Sh SEE ALSO
 .Xr groff 1 ,
 .Xr mdoc.samples 7 ,
@@ -63,14 +150,34 @@ utility was written by 
 .An Kristaps Dzonsons Aq kristaps@kth.se .
 .\"
 .Sh CAVEATS
-The
+Most caveats of
 .Nm
-engine doesn't understand
-.Sq \&Xo
+stem from ambiguities in 
+.Xr mdoc 7
+or the necessary limitations of converting an ad hoc language into
+structured ones:
+.Bl -enum -compact -offset indent
+.It 
+The engine doesn't understand the
+.Sq \&No ,
+.Sq \&Db ,
+.Sq \&Xc ,
 and
-.Sq \&Xc
-troff macros.
+.Sq \&Xo
+mdoc macros.
+.It 
+All macro arguments may be quoted, instead of only some.
+.It 
+Blank lines raise errors.
+.It 
+If terminating punctuation is found, then 
+.Em all
+remaining tokens are flushed after line scope is closed, not just the
+last one.
+.El
 .Pp
-.Em All
-macro arguments may be quoted, instead of only some.
+The roff engine in 
+.Nm
+produces text in-line; thus, output may already be partially written by
+the time an error is encountered.
 .\" .Sh BUGS