diff --git a/C4/SearchMarc.pm b/C4/SearchMarc.pm
index 2e98e9e32b..67d941ed0a 100644
--- a/C4/SearchMarc.pm
+++ b/C4/SearchMarc.pm
@@ -65,96 +65,139 @@ sub catalogsearch {
 	#		where m1.bibid=m2.bibid and
 	#		(m1.subfieldvalue like "Des%" and m2.subfieldvalue like "27%")
 
-	my $sql_tables; # will contain marc_subfield_table as m1,...
-	my $sql_where1; # will contain the "true" where
-	my $sql_where2; # will contain m1.bibid=m2.bibid
-	my $nb_active=0; # will contain the number of "active" entries. and entry is active is a value is provided.
-	my $nb_table=1; # will contain the number of table. ++ on each entry EXCEPT when an OR  is provided.
+	# "Normal" statements
+	my @normal_tags = ();
+	my @normal_subfields = ();
+	my @normal_and_or = ();
+	my @normal_operator = ();
+	my @normal_value = ();
 
-	for(my $i=0; $i<=@$value;$i++) {
-		if (@$value[$i]) {
-			$nb_active++;
-			if ($nb_active==1) {
-				if (@$operator[$i] eq "start") {
-					$sql_tables .= "marc_subfield_table as m$nb_table,";
-					$sql_where1 .= "@$excluding[$i](m1.subfieldvalue like '@$value[$i]%'";
-					if (@$tags[$i]) {
-						$sql_where1 .=" and m1.tag=@$tags[$i] and m1.subfieldcode='@$subfields[$i]'";
-					}
-					$sql_where1.=")";
-				} elsif (@$operator[$i] eq "contains") {
-					$sql_tables .= "marc_word as m$nb_table,";
-					$sql_where1 .= "@$excluding[$i](m1.word  like '@$value[$i]%'";
-					if (@$tags[$i]) {
-						 $sql_where1 .=" and m1.tag=@$tags[$i] and m1.subfieldid='@$subfields[$i]'";
-					}
-					$sql_where1.=")";
-				} else {
-					$sql_tables .= "marc_subfield_table as m$nb_table,";
-					$sql_where1 .= "@$excluding[$i](m1.subfieldvalue @$operator[$i] '@$value[$i]' ";
-					if (@$tags[$i]) {
-						 $sql_where1 .=" and m1.tag=@$tags[$i] and m1.subfieldcode='@$subfields[$i]'";
-					}
-					$sql_where1.=")";
+	# Extracts the NOT statements from the list of statements
+	my @not_tags = ();
+	my @not_subfields = ();
+	my @not_and_or = ();
+	my @not_operator = ();
+	my @not_value = ();
+	my $any_not = 0;
+
+	for(my $i = 0 ; $i <= $#{$value} ; $i++)
+	{
+		if(@$excluding[$i])	# NOT statements
+		{
+			$any_not = 1;
+			if(@$operator[$i] eq "contains")
+			{
+				foreach my $word (split(/ /, @$value[$i]))	# if operator is contains, splits the words in separate requests
+				{
+					push @not_tags, @$tags[$i];
+					push @not_subfields, @$subfields[$i];
+					push @not_and_or, "or"; # as request is negated, finds "foo" or "bar" if final request is NOT "foo" and "bar"
+					push @not_operator, @$operator[$i];
+					push @not_value, $word;
 				}
-			} else {
-				if (@$operator[$i] eq "start") {
-					$nb_table++;
-					$sql_tables .= "marc_subfield_table as m$nb_table,";
-					$sql_where1 .= "@$and_or[$i] @$excluding[$i](m$nb_table.subfieldvalue like '@$value[$i]%'";
-					if (@$tags[$i]) {
-						 $sql_where1 .=" and m$nb_table.tag=@$tags[$i] and m$nb_table.subfieldcode='@$subfields[$i])";
-					}
-					$sql_where1.=")";
-					$sql_where2 .= "m1.bibid=m$nb_table.bibid";
-				} elsif (@$operator[$i] eq "contains") {
-					if (@$and_or[$i] eq 'and') {
-						$nb_table++;
-						$sql_tables .= "marc_word as m$nb_table,";
-						$sql_where1 .= "@$and_or[$i] @$excluding[$i](m$nb_table.word like '@$value[$i]%'";
-						if (@$tags[$i]) {
-							$sql_where1 .="  and m$nb_table.tag=@$tags[$i] and m$nb_table.subfieldid='@$subfields[$i]'";
-						}
-						$sql_where1.=")";
-						$sql_where2 .= "m1.bibid=m$nb_table.bibid";
-					} else {
-						$sql_where1 .= "@$and_or[$i] @$excluding[$i](m$nb_table.word like '@$value[$i]%'";
-						if (@$tags[$i]) {
-							$sql_where1 .="  and m$nb_table.tag=@$tags[$i] and m$nb_table.subfieldid='@$subfields[$i]'";
-						}
-						$sql_where1.=")";
-						$sql_where2 .= "m1.bibid=m$nb_table.bibid";
-					}
-				} else {
-					$nb_table++;
-					$sql_tables .= "marc_subfield_table as m$nb_table,";
-					$sql_where1 .= "@$and_or[$i] @$excluding[$i](m$nb_table.subfieldvalue @$operator[$i] '@$value[$i]'";
-					if (@$tags[$i]) {
-						 $sql_where1 .="  and m$nb_table.tag=@$tags[$i] and m$nb_table.subfieldcode='@$subfields[$i]'";
-					}
-					$sql_where2 .= "m1.bibid=m$nb_table.bibid";
-					$sql_where1.=")";
+			}
+			else
+			{
+				push @not_tags, @$tags[$i];
+				push @not_subfields, @$subfields[$i];
+				push @not_and_or, "or"; # as request is negated, finds "foo" or "bar" if final request is NOT "foo" and "bar"
+				push @not_operator, @$operator[$i];
+				push @not_value, @$value[$i];
+			}
+		}
+		else	# NORMAL statements
+		{
+			if(@$operator[$i] eq "contains") # if operator is contains, splits the words in separate requests
+			{
+				foreach my $word (split(/ /, @$value[$i]))
+				{
+					push @normal_tags, @$tags[$i];
+					push @normal_subfields, @$subfields[$i];
+					push @normal_and_or, "and";	# assumes "foo" and "bar" if "foo bar" is entered
+					push @normal_operator, @$operator[$i];
+					push @normal_value, $word;
 				}
 			}
+			else
+			{
+				push @normal_tags, @$tags[$i];
+				push @normal_subfields, @$subfields[$i];
+				push @normal_and_or, @$and_or[$i];
+				push @normal_operator, @$operator[$i];
+				push @normal_value, @$value[$i];
+			}
 		}
 	}
-	chop $sql_tables;
+
+	# Finds the basic results without the NOT requests
+	my ($sql_tables, $sql_where1, $sql_where2) = create_request(\@normal_tags, \@normal_subfields, \@normal_and_or, \@normal_operator, \@normal_value);
+
 	my $sth;
+#	warn "HERE (NORMAL)";
 	if ($sql_where2) {
 		$sth = $dbh->prepare("select distinct m1.bibid from $sql_tables where $sql_where2 and ($sql_where1)");
+#		warn("-->select m1.bibid from $sql_tables where $sql_where2 and ($sql_where1)");
 	} else {
 		$sth = $dbh->prepare("select distinct m1.bibid from $sql_tables where $sql_where1");
+#		warn("==>select m1.bibid from $sql_tables where $sql_where1");
 	}
-	$sth->execute;
-	my @result;
-	while (my ($bibid) = $sth->fetchrow) {
-		push @result,$bibid;
+
+	$sth->execute();
+	my @result = ();
+
+	# Processes the NOT if any and there are results
+	my ($not_sql_tables, $not_sql_where1, $not_sql_where2);
+
+	if( ($sth->rows) && $any_not )	# some results to tune up and some NOT statements
+	{
+		($not_sql_tables, $not_sql_where1, $not_sql_where2) = create_request(\@not_tags, \@not_subfields, \@not_and_or, \@not_operator, \@not_value);
+
+		my @tmpresult;
+
+		while (my ($bibid) = $sth->fetchrow) {
+			push @tmpresult,$bibid;
+		}
+		my $sth_not;
+#		warn "HERE (NOT)";
+		if ($not_sql_where2) {
+			$sth_not = $dbh->prepare("select distinct m1.bibid from $not_sql_tables where $not_sql_where2 and ($not_sql_where1)");
+#			warn("-->select m1.bibid from $not_sql_tables where $not_sql_where2 and ($not_sql_where1)");
+		} else {
+			$sth_not = $dbh->prepare("select distinct m1.bibid from $not_sql_tables where $not_sql_where1");
+#			warn("==>select m1.bibid from $not_sql_tables where $not_sql_where1");
+		}
+
+		$sth_not->execute();
+
+		if($sth_not->rows)
+		{
+			my %not_bibids = ();
+			while(my $bibid = $sth_not->fetchrow()) {
+				$not_bibids{$bibid} = 1;	# populates the hashtable with the bibids matching the NOT statement
+			}
+
+			foreach my $bibid (@tmpresult)
+			{
+				if(!$not_bibids{$bibid})
+				{
+					push @result, $bibid;
+				}
+			}
+		}
+		$sth_not->finish();
 	}
+	else	# no NOT statements
+	{
+		while (my ($bibid) = $sth->fetchrow) {
+			push @result,$bibid;
+		}
+	}
+
 	# we have bibid list. Now, loads title and author from [offset] to [offset]+[length]
 	my $counter = $offset;
 	$sth = $dbh->prepare("select author,title from biblio,marc_biblio where biblio.biblionumber=marc_biblio.biblionumber and bibid=?");
 	my @finalresult = ();
-	while ($counter <= ($offset + $length)) {
+	while (($counter <= $#result) && ($counter <= ($offset + $length))) {
 		$sth->execute($result[$counter]);
 		my ($author,$title) = $sth->fetchrow;
 		my %line;
@@ -164,9 +207,104 @@ sub catalogsearch {
 		push @finalresult, \%line;
 		$counter++;
 	}
-	return @finalresult;
+
+	my $nbresults = $#result + 1;
+	return (\@finalresult, $nbresults);
 }
 
+# Creates the SQL Request
+
+sub create_request {
+	my ($tags, $subfields, $and_or, $operator, $value) = @_;
+
+	my $sql_tables; # will contain marc_subfield_table as m1,...
+	my $sql_where1; # will contain the "true" where
+	my $sql_where2 = "("; # will contain m1.bibid=m2.bibid
+	my $nb_active=0; # will contain the number of "active" entries. and entry is active is a value is provided.
+	my $nb_table=1; # will contain the number of table. ++ on each entry EXCEPT when an OR  is provided.
+
+	for(my $i=0; $i<=@$value;$i++) {
+		if (@$value[$i]) {
+			$nb_active++;
+			if ($nb_active==1) {
+				if (@$operator[$i] eq "start") {
+					$sql_tables .= "marc_subfield_table as m$nb_table,";
+					$sql_where1 .= "(m1.subfieldvalue like '@$value[$i]%'";
+					if (@$tags[$i]) {
+						$sql_where1 .=" and m1.tag=@$tags[$i] and m1.subfieldcode='@$subfields[$i]'";
+					}
+					$sql_where1.=")";
+				} elsif (@$operator[$i] eq "contains") {
+					$sql_tables .= "marc_word as m$nb_table,";
+					$sql_where1 .= "(m1.word  like '@$value[$i]%'";
+					if (@$tags[$i]) {
+						 $sql_where1 .=" and m1.tag=@$tags[$i] and m1.subfieldid='@$subfields[$i]'";
+					}
+					$sql_where1.=")";
+				} else {
+					$sql_tables .= "marc_subfield_table as m$nb_table,";
+					$sql_where1 .= "(m1.subfieldvalue @$operator[$i] '@$value[$i]' ";
+					if (@$tags[$i]) {
+						 $sql_where1 .=" and m1.tag=@$tags[$i] and m1.subfieldcode='@$subfields[$i]'";
+					}
+					$sql_where1.=")";
+				}
+			} else {
+				if (@$operator[$i] eq "start") {
+					$nb_table++;
+					$sql_tables .= "marc_subfield_table as m$nb_table,";
+					$sql_where1 .= "@$and_or[$i] (m$nb_table.subfieldvalue like '@$value[$i]%'";
+					if (@$tags[$i]) {
+					 	$sql_where1 .=" and m$nb_table.tag=@$tags[$i] and m$nb_table.subfieldcode='@$subfields[$i]'";
+					}
+					$sql_where1.=")";
+					$sql_where2 .= "m1.bibid=m$nb_table.bibid and ";
+				} elsif (@$operator[$i] eq "contains") {
+					if (@$and_or[$i] eq 'and') {
+						$nb_table++;
+						$sql_tables .= "marc_word as m$nb_table,";
+						$sql_where1 .= "@$and_or[$i] (m$nb_table.word like '@$value[$i]%'";
+						if (@$tags[$i]) {
+							$sql_where1 .=" and m$nb_table.tag=@$tags[$i] and m$nb_table.subfieldid='@$subfields[$i]'";
+						}
+						$sql_where1.=")";
+						$sql_where2 .= "m1.bibid=m$nb_table.bibid and ";
+					} else {
+						$sql_where1 .= "@$and_or[$i] (m$nb_table.word like '@$value[$i]%'";
+						if (@$tags[$i]) {
+							$sql_where1 .="  and m$nb_table.tag=@$tags[$i] and m$nb_table.subfieldid='@$subfields[$i]'";
+						}
+						$sql_where1.=")";
+						$sql_where2 .= "m1.bibid=m$nb_table.bibid and ";
+					}
+				} else {
+					$nb_table++;
+					$sql_tables .= "marc_subfield_table as m$nb_table,";
+					$sql_where1 .= "@$and_or[$i] (m$nb_table.subfieldvalue @$operator[$i] '@$value[$i]'";
+					if (@$tags[$i]) {
+					 	$sql_where1 .="  and m$nb_table.tag=@$tags[$i] and m$nb_table.subfieldcode='@$subfields[$i]'";
+					}
+					$sql_where2 .= "m1.bibid=m$nb_table.bibid and ";
+					$sql_where1.=")";
+				}
+			}
+		}
+	}
+
+	if($sql_where2 ne "(")	# some datas added to sql_where2, processing
+	{
+		$sql_where2 = substr($sql_where2, 0, (length($sql_where2)-5)); # deletes the trailing ' and '
+		$sql_where2 .= ")";
+	}
+	else	# no sql_where2 statement, deleting '('
+	{
+		$sql_where2 = "";
+	}
+	chop $sql_tables;	# deletes the trailing ','
+	return ($sql_tables, $sql_where1, $sql_where2);
+}
+
+
 END { }       # module clean-up code here (global destructor)
 
 1;