diff --git a/v2/acl/grpc/types.pb.go b/v2/acl/grpc/types.pb.go
index e1805a3..fe81184 100644
--- a/v2/acl/grpc/types.pb.go
+++ b/v2/acl/grpc/types.pb.go
@@ -760,7 +760,7 @@ func (x *BearerToken_Body) GetLifetime() *BearerToken_Body_TokenLifetime {
 	return nil
 }
 
-// Lifetime parameters of the token. Filed names taken from
+// Lifetime parameters of the token. Field names taken from
 // [rfc7519](https://tools.ietf.org/html/rfc7519).
 type BearerToken_Body_TokenLifetime struct {
 	state         protoimpl.MessageState
diff --git a/v2/object/grpc/service.pb.go b/v2/object/grpc/service.pb.go
index e35c1d0..77f84ef 100644
--- a/v2/object/grpc/service.pb.go
+++ b/v2/object/grpc/service.pb.go
@@ -1875,7 +1875,7 @@ func (x *SearchRequest_Body) GetFilters() []*SearchRequest_Body_Filter {
 //
 // * $Object:version \
 //   version
-// * $Object:objectID                       \
+// * $Object:objectID \
 //   object_id
 // * $Object:containerID \
 //   container_id
@@ -1893,6 +1893,8 @@ func (x *SearchRequest_Body) GetFilters() []*SearchRequest_Body_Filter {
 //   homomorphic_hash
 // * $Object:split.parent \
 //   object_id of parent
+// * $Object:split.splitID \
+//   16 byte UUID used to identify the split object hierarchy parts
 //
 // There are some well-known filter aliases to match objects by certain
 // properties:
@@ -1909,10 +1911,6 @@ func (x *SearchRequest_Body) GetFilters() []*SearchRequest_Body_Filter {
 // * $Object:PHY \
 //   Returns only objects physically stored in the system. This filter is
 //   activated if the `key` exists, disregarding the value and matcher type.
-// * $Object:CHILDFREE \
-//   With the `value` set to `true` checks if an object has empty
-//   children list in `Split` header. With other values returns
-//   non-childfree objects.
 type SearchRequest_Body_Filter struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
diff --git a/v2/object/grpc/types.go b/v2/object/grpc/types.go
index fa3ae76..b1f46c8 100644
--- a/v2/object/grpc/types.go
+++ b/v2/object/grpc/types.go
@@ -54,6 +54,13 @@ func (m *Header_Split) SetChildren(v []*refs.ObjectID) {
 	}
 }
 
+// SetSplitID sets split ID of the object.
+func (m *Header_Split) SetSplitId(v []byte) {
+	if m != nil {
+		m.SplitId = v
+	}
+}
+
 // SetContainerId sets identifier of the container.
 func (m *Header) SetContainerId(v *refs.ContainerID) {
 	if m != nil {
diff --git a/v2/object/grpc/types.pb.go b/v2/object/grpc/types.pb.go
index 0498da0..8d5eede 100644
--- a/v2/object/grpc/types.pb.go
+++ b/v2/object/grpc/types.pb.go
@@ -536,6 +536,10 @@ type Header_Split struct {
 	ParentHeader *Header `protobuf:"bytes,4,opt,name=parent_header,json=parentHeader,proto3" json:"parent_header,omitempty"`
 	// List of identifiers of the objects generated by splitting current one.
 	Children []*grpc.ObjectID `protobuf:"bytes,5,rep,name=children,proto3" json:"children,omitempty"`
+	// 16 byte UUID used to identify the split object hierarchy parts. Must be
+	// unique inside container. All objects participating in the split must
+	// have the same `split_id` value.
+	SplitId []byte `protobuf:"bytes,6,opt,name=split_id,json=splitID,proto3" json:"split_id,omitempty"`
 }
 
 func (x *Header_Split) Reset() {
@@ -605,6 +609,13 @@ func (x *Header_Split) GetChildren() []*grpc.ObjectID {
 	return nil
 }
 
+func (x *Header_Split) GetSplitId() []byte {
+	if x != nil {
+		return x.SplitId
+	}
+	return nil
+}
+
 var File_v2_object_grpc_types_proto protoreflect.FileDescriptor
 
 var file_v2_object_grpc_types_proto_rawDesc = []byte{
@@ -630,7 +641,7 @@ var file_v2_object_grpc_types_proto_rawDesc = []byte{
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@@ -674,7 +685,7 @@ var file_v2_object_grpc_types_proto_rawDesc = []byte{
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@@ -692,33 +703,34 @@ var file_v2_object_grpc_types_proto_rawDesc = []byte{
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 }
 
 var (
diff --git a/v2/session/grpc/types.pb.go b/v2/session/grpc/types.pb.go
index 7140ceb..76331a0 100644
--- a/v2/session/grpc/types.pb.go
+++ b/v2/session/grpc/types.pb.go
@@ -723,7 +723,7 @@ type SessionToken_Body_Object struct {
 
 func (*SessionToken_Body_Object) isSessionToken_Body_Context() {}
 
-// Lifetime parameters of the token. Filed names taken from rfc7519.
+// Lifetime parameters of the token. Field names taken from rfc7519.
 type SessionToken_Body_TokenLifetime struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache