Added:

       Note: currently, only btree access method supports  multi-
       attribute indices.  Up to 7 keys may be specified.

src/man/create_index.l

 .\" This is -*-nroff-*-
 .\" XXX standard disclaimer belongs here....
-.\" $Header: /cvsroot/pgsql/src/man/Attic/create_index.l,v 1.5 1997/05/13 04:41:51 momjian Exp $
+.\" $Header: /cvsroot/pgsql/src/man/Attic/create_index.l,v 1.6 1997/05/14 01:38:34 vadim Exp $
 .TH "CREATE INDEX" SQL 11/05/95 PostgreSQL PostgreSQL
 .SH NAME
 create index \(em construct a secondary index
@@ -8,7 +8,7 @@ create index \(em construct a secondary index
 .nf
 \fBcreate\fR [\fBunique\fR] \fBindex\fR index-name
 	\fBon\fR classname [\fBusing\fR am-name]
-	\fB(\fR attname, ... [type_class\fB] )\fR
+	\fB(\fR attname [type_class], ...\fB )\fR
 
 \fBcreate\fR [\fBunique\fR] \fBindex\fR index-name
 	\fBon\fR classname [\fBusing\fR am-name]
@@ -34,6 +34,11 @@ integers.
 The default operator class is the appropriate operator class for
 that field type.
 .PP
+\fBNote:\fR currently, only 
+.IR btree
+access method supports multi-attribute indices.
+Up to 7 keys may be specified.
+.PP
 In the second syntax shown above, an index can be defined on the
 result of a user-defined function
 .IR funcname