1 files changed, 18 insertions, 8 deletions
diff --git a/doc/grecs_parse.3 b/doc/grecs_parse.3
index 357889f..c51ef95 100644
--- a/doc/grecs_parse.3
+++ b/doc/grecs_parse.3
@@ -16,7 +16,7 @@
 .\" This file is part of SLB. 
 .\" Copyright (C) 2011 Sergey Poznyakoff
 .\"
-.TH GRECS_PARSE 3 "May 4, 2011" "GRECS" "Grecs User Reference"
+.TH GRECS_PARSE 3 "May 7, 2011" "GRECS" "Grecs User Reference"
 .SH NAME
 grecs_parse \- parse a configuration file.
 .SH SYNOPSIS
@@ -48,14 +48,18 @@ typedef struct grecs_node {
      struct grecs_node *next;
      struct grecs_node *prev;
      char *ident;
-     struct grecs_value value;
+     union {
+          struct grecs_value *value;
+          struct grecs_symtab *texttab;
+     } v;
 } grecs_node_t;
 .in
 .fi
 .PP
 The \fItype\fR member describes the type of this node.  Its value is
-\fBgrecs_node_stmt\fR for simple statements, and
-\fBgrecs_node_block\fR, for block statements.
+\fBgrecs_node_stmt\fR for simple statements and
+\fBgrecs_node_block\fR, for block statements.  The topmost node (the
+one returned by \fBgrecs_tree_parse\fR) has type \fBgrecs_node_root\fR.
 .PP
 The \fIlocus\fR describes the location in the input file, which this
 node described.  See
@@ -97,8 +101,14 @@ pidfile "/var/run/mypid";
 .sp
 will have \fBident\fR pointing to the string \fB/var/run/mypid\fR.
 .PP
-Finally, the \fBvalue\fR member keeps the value associated with this
-statement.  It is defined as:
+The \fBv\fR union keeps data which depend on the type of this node.
+The \fBv.texttab\fR member is defined only for the root node (type
+\fBgrecs_node_root\fR). It points to a symbol table which holds shared
+strings for this tree. In particular, this table holds file names
+referenced by \fBlocus\fR members of all underlying nodes.
+.PP
+For non-root nodes,the \fBv.value\fR member is defined.  It points to
+the value associated with this statement.  A value is defined as:
 .sp
 .nf
 .in +5
@@ -106,10 +116,10 @@ typedef struct grecs_value {
      int type;
      union {
           struct grecs_list *list;
-          const char *string;
+          char *string;
           struct {
                size_t c;
-               struct grecs_value *v;
+               struct grecs_value **v;
           } arg;
      } v;
 } grecs_value_t;