diff --git a/netmap/grpc/types.pb.go b/netmap/grpc/types.pb.go
index f1d5ef0..9c6c489 100644
Binary files a/netmap/grpc/types.pb.go and b/netmap/grpc/types.pb.go differ
diff --git a/netmap/types.go b/netmap/types.go
index 27fc2ff..aece7cf 100644
--- a/netmap/types.go
+++ b/netmap/types.go
@@ -55,6 +55,7 @@ type Replica struct {
 type Operation uint32
 
 type PlacementPolicy struct {
+	unique       bool
 	replicas     []Replica
 	backupFactor uint32
 	selectors    []Selector
@@ -106,6 +107,7 @@ const (
 	LE
 	OR
 	AND
+	NOT
 )
 
 const (
@@ -257,6 +259,17 @@ func (r *Replica) SetCount(count uint32) {
 	r.count = count
 }
 
+func (p *PlacementPolicy) GetUnique() bool {
+	if p != nil {
+		return p.unique
+	}
+	return false
+}
+
+func (p *PlacementPolicy) SetUnique(unique bool) {
+	p.unique = unique
+}
+
 func (p *PlacementPolicy) GetFilters() []Filter {
 	if p != nil {
 		return p.filters