===================================================================
RCS file: /cvs/mandoc/Attic/mdoc.3,v
retrieving revision 1.9
retrieving revision 1.13
diff -u -p -r1.9 -r1.13
--- mandoc/Attic/mdoc.3	2009/02/23 15:19:47	1.9
+++ mandoc/Attic/mdoc.3	2009/02/27 09:14:02	1.13
@@ -1,4 +1,4 @@
-.\" $Id: mdoc.3,v 1.9 2009/02/23 15:19:47 kristaps Exp $
+.\" $Id: mdoc.3,v 1.13 2009/02/27 09:14:02 kristaps Exp $
 .\"
 .\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se>
 .\"
@@ -16,7 +16,7 @@
 .\" TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 .\" PERFORMANCE OF THIS SOFTWARE.
 .\" 
-.Dd $Mdocdate: February 23 2009 $
+.Dd $Mdocdate: February 27 2009 $
 .Dt mdoc 3
 .Os
 .\" SECTION
@@ -59,7 +59,10 @@ library implements only those macros documented in the
 .Xr mdoc 7
 and
 .Xr mdoc.samples 7
-manuals.
+manuals.  Documents with 
+.Xr refer 1 ,
+.Xr eqn 1
+and other pre-processor sections aren't accomodated.
 .\" PARAGRAPH
 .Pp
 .Nm
@@ -89,7 +92,9 @@ This section further defines the 
 .Sx Functions 
 and
 .Sx Variables
-available to programmers.  The last sub-section,
+available to programmers.  Following that,
+.Sx Character Encoding
+describes input format.  Lastly, 
 .Sx Abstract Syntax Tree ,
 documents the output tree.
 .\" SUBSECTION
@@ -173,6 +178,63 @@ An array of string-ified token names.
 .It Va mdoc_argnames
 An array of string-ified token argument names.
 .El
+.\" SUBSECTION
+.Ss Character Encoding
+The
+.Xr mdoc 3
+library accepts only printable ASCII characters as defined by
+.Xr isprint 3 .
+Non-ASCII character sequences are delimited in various ways.  All are
+preceeded by an escape character
+.Sq \\
+and followed by either an open-parenthesis 
+.Sq \&(
+for two-character sequences; an open-bracket
+.Sq \&[
+for n-character sequences (terminated at a close-bracket
+.Sq \&] ) ;
+an asterisk and open-parenthesis
+.Sq \&*(
+for two-character sequences;
+an asterisk and non-open-parenthesis 
+.Sq \&*
+for single-character sequences; or one of a small set of standalone
+single characters for other escapes.
+.\" PARAGRAPH
+.Pp
+Examples:
+.Pp
+.Bl -tag -width "XXXXXXXX" -offset "XXXX" -compact
+.\" LIST-ITEM
+.It \\*(<=
+prints 
+.Dq \*(<=
+.Pq greater-equal
+.\" LIST-ITEM
+.It \\(<-
+prints
+.Dq \(<-
+.Pq left-arrow
+.\" LIST-ITEM
+.It \\[<-]
+also prints
+.Dq \(<-
+.Pq left-arrow
+.\" LIST-ITEM
+.It \\*(Ba
+prints
+.Dq \*(Ba
+.Pq bar
+.\" LIST-ITEM
+.It \\*q
+prints
+.Dq \*q
+.Pq double-quote
+.El
+.\" PARAGRAPH
+.Pp
+All escaped sequences are syntax-checked, but it's up to the front-end
+system to correctly render them to the output device.
 .\" SUBSECTION
 .Ss Abstract Syntax Tree
 The