diff --git a/v2/object/filters.go b/v2/object/filters.go
new file mode 100644
index 0000000..24209af
--- /dev/null
+++ b/v2/object/filters.go
@@ -0,0 +1,44 @@
+package object
+
+// ReservedFilterPrefix is a prefix of key to object header value or property.
+const ReservedFilterPrefix = "$Object:"
+
+const (
+	// FilterHeaderVersion is a filter key to "version" field of the object header.
+	FilterHeaderVersion = ReservedFilterPrefix + "version"
+
+	// FilterHeaderContainerID is a filter key to "container_id" field of the object header.
+	FilterHeaderContainerID = ReservedFilterPrefix + "containerID"
+
+	// FilterHeaderOwnerID is a filter key to "owner_id" field of the object header.
+	FilterHeaderOwnerID = ReservedFilterPrefix + "ownerID"
+
+	// FilterHeaderCreationEpoch is a filter key to "creation_epoch" field of the object header.
+	FilterHeaderCreationEpoch = ReservedFilterPrefix + "creationEpoch"
+
+	// FilterHeaderPayloadLength is a filter key to "payload_length" field of the object header.
+	FilterHeaderPayloadLength = ReservedFilterPrefix + "payloadLength"
+
+	// FilterHeaderPayloadHash is a filter key to "payload_hash" field of the object header.
+	FilterHeaderPayloadHash = ReservedFilterPrefix + "payloadHash"
+
+	// FilterHeaderObjectType is a filter key to "object_type" field of the object header.
+	FilterHeaderObjectType = ReservedFilterPrefix + "objectType"
+
+	// FilterHeaderHomomorphicHash is a filter key to "homomorphic_hash" field of the object header.
+	FilterHeaderHomomorphicHash = ReservedFilterPrefix + "homomorphicHash"
+
+	// FilterHeaderParent is a filter key to "split.parent" field of the object header.
+	FilterHeaderParent = ReservedFilterPrefix + "split.parent"
+)
+
+const (
+	// FilterPropertyRoot is a filter key to check if an object is a top object in a split hierarchy.
+	FilterPropertyRoot = ReservedFilterPrefix + "ROOT"
+
+	// FilterPropertyLeaf is a filter key to check if an object is a leaf in a split hierarchy.
+	FilterPropertyLeaf = ReservedFilterPrefix + "LEAF"
+
+	// FilterPropertyChildfree is a filter key to check if an object has empty children list in `Split` header.
+	FilterPropertyChildfree = ReservedFilterPrefix + "CHILDFREE"
+)