diff --git a/proto/sagittarius/datatype.proto b/proto/sagittarius/datatype.proto
index ecab9ee..5946994 100644
--- a/proto/sagittarius/datatype.proto
+++ b/proto/sagittarius/datatype.proto
@@ -1,47 +1,12 @@
 syntax = "proto3";
-import "translations.proto";
-import "google/protobuf/any.proto";
+import "datatype_definition.proto";
 
 option ruby_package = "Tucana::Sagittarius";
 
 package sagittarius;
 
-message DataType {
-  enum Variant {
-    UNKNOWN = 0;
-    PRIMITIVE = 1;
-    TYPE = 2;
-    OBJECT = 3;
-    DATATYPE = 4;
-    ARRAY = 5;
-    GENERIC = 6;
-    FUNCTION = 7;
-  }
-
-  shared.Translation name = 1;
-  Variant variant = 2;
-  repeated DataTypeRule rules = 3;
-  repeated DataType input_types = 4;
-  optional DataType return_type = 5;
-  optional DataType parent_type = 6;
-}
-
-message DataTypeRule {
-  enum Variant {
-    UNKNOWN = 0;
-    REGEX = 1;
-    NUMBER_RANGE = 2;
-    ITEM_OF_COLLECTION = 3;
-    CONTAINS_TYPE = 4;
-    CONTAINS_KEY = 5;
-  }
-
-  Variant variant = 1;
-  map<string, google.protobuf.Any> config = 2;
-}
-
 message DataTypeUpdateRequest {
-  repeated DataType data_types = 1;
+  repeated shared.DataType data_types = 1;
 }
 
 message DataTypeUpdateResponse {
diff --git a/proto/shared/datatype_definition.proto b/proto/shared/datatype_definition.proto
new file mode 100644
index 0000000..1ca52f2
--- /dev/null
+++ b/proto/shared/datatype_definition.proto
@@ -0,0 +1,41 @@
+syntax = "proto3";
+import "google/protobuf/any.proto";
+import "translations.proto";
+
+option ruby_package = "Tucana::Shared";
+
+package shared;
+
+message DataType {
+  enum Variant {
+    UNKNOWN = 0;
+    PRIMITIVE = 1;
+    TYPE = 2;
+    OBJECT = 3;
+    DATATYPE = 4;
+    ARRAY = 5;
+    GENERIC = 6;
+    FUNCTION = 7;
+  }
+
+  Translation name = 1;
+  Variant variant = 2;
+  repeated DataTypeRule rules = 3;
+  repeated DataType input_types = 4;
+  optional DataType return_type = 5;
+  optional DataType parent_type = 6;
+}
+
+message DataTypeRule {
+  enum Variant {
+    UNKNOWN = 0;
+    REGEX = 1;
+    NUMBER_RANGE = 2;
+    ITEM_OF_COLLECTION = 3;
+    CONTAINS_TYPE = 4;
+    CONTAINS_KEY = 5;
+  }
+
+  Variant variant = 1;
+  map<string, google.protobuf.Any> config = 2;
+}