-.\" $Id: mdoc.3,v 1.6 2009/02/23 09:33:34 kristaps Exp $
+.\" $Id: mdoc.3,v 1.8 2009/02/23 12:45:19 kristaps Exp $
.\"
.\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se>
.\"
The
.Nm mdoc
library parses lines of mdoc input into an abstract syntax tree.
-.Dq mdoc
-is a macro package of the
+.Dq mdoc ,
+which is used to format BSD manual pages, is a macro package of the
.Dq roff
-language, which is used to format BSD manual pages. The
+language. The
.Nm
library implements only those macros documented in the
.Xr mdoc 7
.Pp
Of note are the TEXT nodes following the HEAD, BODY and TAIL nodes of
the BLOCK production. These refer to punctuation marks. Furthermore,
-although a TEXT node will generally have a non-zero-length string, it
-certain cases, such as
-.Dq \&.Bd \-literal ,
+although a TEXT node will generally have a non-zero-length string, in
+the specific case of
+.Sq \&.Bd \-literal ,
an empty line will produce a zero-length string.
.\" PARAGRAPH
.Pp
-The rule-of-thumb for mapping node types to macros follows: in-line
+The rule-of-thumb for mapping node types to macros follows. In-line
elements, such as
-.Dq \&.Em foo ,
+.Sq \&.Em foo ,
are classified as ELEMENT nodes, which can only contain text.
-Multi-line elements such as
-.Dq \&.Sh
+Multi-line elements, such as
+.Sq \&.Sh ,
are BLOCK elements, where the HEAD constitutes line contents and the
BODY constitutes subsequent lines. In-line elements with matching
pairs, such as
-.Dq \&.So
+.Sq \&.So
and
-.Dq \&.Sc ,
+.Sq \&.Sc ,
are BLOCK elements with no HEAD tag. The only exception to this is
-.Dq \&.Eo
+.Sq \&.Eo
and
-.Dq \&.Ec ,
+.Sq \&.Ec ,
which has a HEAD and TAIL node corresponding to the enclosure string.
-TEXT nodes, obviously, constitute text; the ROOT node is the document's
-root.
+TEXT nodes, obviously, constitute text, and the ROOT node is the
+document's root.
.\" SECTION
.Sh EXAMPLES
The following example reads lines from stdin and parses them, operating