diff --git a/metadata/identifier/base_metadata_identifier.go b/metadata/identifier/base_metadata_identifier.go
index 3e67f1464078700a792d2f9760cb0b195257625b..5f3df4c607e69d2b56e1258d081c148524cd7aca 100644
--- a/metadata/identifier/base_metadata_identifier.go
+++ b/metadata/identifier/base_metadata_identifier.go
@@ -49,7 +49,7 @@ func joinParams(joinChar string, params []string) string {
 	return joinedStr
 }
 
-// getIdentifierKey will return string format is service:Version:Group:Side:param1:param2...
+// getIdentifierKey returns string that format is service:Version:Group:Side:param1:param2...
 func (mdi *BaseServiceMetadataIdentifier) getIdentifierKey(params ...string) string {
 	return mdi.serviceInterface +
 		constant.KEY_SEPARATOR + mdi.version +
@@ -58,7 +58,7 @@ func (mdi *BaseServiceMetadataIdentifier) getIdentifierKey(params ...string) str
 		joinParams(constant.KEY_SEPARATOR, params)
 }
 
-// getFilePathKey will return string format is metadata/path/Version/Group/Side/param1/param2...
+// getFilePathKey returns string that format is metadata/path/Version/Group/Side/param1/param2...
 func (mdi *BaseServiceMetadataIdentifier) getFilePathKey(params ...string) string {
 	path := serviceToPath(mdi.serviceInterface)
 
diff --git a/metadata/identifier/metadata_identifier.go b/metadata/identifier/metadata_identifier.go
index c3e8dc1a214e736b143eb662a18c49ac2a38ad33..7e72c10da9c088ca167fa4fbc4dcb57f44b8c06d 100644
--- a/metadata/identifier/metadata_identifier.go
+++ b/metadata/identifier/metadata_identifier.go
@@ -23,12 +23,12 @@ type MetadataIdentifier struct {
 	BaseMetadataIdentifier
 }
 
-// GetIdentifierKey will return string format is service:Version:Group:Side:Application
+// GetIdentifierKey returns string that format is service:Version:Group:Side:Application
 func (mdi *MetadataIdentifier) getIdentifierKey(params ...string) string {
 	return mdi.BaseMetadataIdentifier.getIdentifierKey(mdi.application)
 }
 
-// GetFilePathKey will return string format is metadata/path/Version/Group/Side/Application
+// GetFilePathKey returns string that format is metadata/path/Version/Group/Side/Application
 func (mdi *MetadataIdentifier) getFilePathKey(params ...string) string {
 	return mdi.BaseMetadataIdentifier.getFilePathKey(mdi.application)
 }
diff --git a/metadata/identifier/service_metadata_identifier.go b/metadata/identifier/service_metadata_identifier.go
index 96c0419ed6ae3e2197b4d66118a9cc3cf3a96f71..ccc149f7306c125b19a25373d4da660a154cc84e 100644
--- a/metadata/identifier/service_metadata_identifier.go
+++ b/metadata/identifier/service_metadata_identifier.go
@@ -28,12 +28,12 @@ type ServiceMetadataIdentifier struct {
 	BaseMetadataIdentifier
 }
 
-// GetIdentifierKey will return string format is service:Version:Group:Side:Protocol:"revision"+Revision
+// GetIdentifierKey returns string that format is service:Version:Group:Side:Protocol:"revision"+Revision
 func (mdi *ServiceMetadataIdentifier) getIdentifierKey(params ...string) string {
 	return mdi.BaseMetadataIdentifier.getIdentifierKey(mdi.protocol + constant.KEY_REVISON_PREFIX + mdi.revision)
 }
 
-// GetFilePathKey will return string format is metadata/path/Version/Group/Side/Protocol/"revision"+Revision
+// GetFilePathKey returns string that format is metadata/path/Version/Group/Side/Protocol/"revision"+Revision
 func (mdi *ServiceMetadataIdentifier) getFilePathKey(params ...string) string {
 	return mdi.BaseMetadataIdentifier.getFilePathKey(mdi.protocol + constant.KEY_REVISON_PREFIX + mdi.revision)
 }
diff --git a/metadata/identifier/subscribe_metadata_identifier.go b/metadata/identifier/subscribe_metadata_identifier.go
index 3dc5006f63d17a719c86e1784cbf98cc50065f1c..38f3ebbd462338b581d83cd19403a00a5064b5a4 100644
--- a/metadata/identifier/subscribe_metadata_identifier.go
+++ b/metadata/identifier/subscribe_metadata_identifier.go
@@ -23,12 +23,12 @@ type SubscriberMetadataIdentifier struct {
 	BaseMetadataIdentifier
 }
 
-// GetIdentifierKey will return string format is service:Version:Group:Side:Revision
+// GetIdentifierKey returns string that format is service:Version:Group:Side:Revision
 func (mdi *SubscriberMetadataIdentifier) getIdentifierKey(params ...string) string {
 	return mdi.BaseMetadataIdentifier.getIdentifierKey(mdi.revision)
 }
 
-// GetFilePathKey will return string format is metadata/path/Version/Group/Side/Revision
+// GetFilePathKey returns string that format is metadata/path/Version/Group/Side/Revision
 func (mdi *SubscriberMetadataIdentifier) getFilePathKey(params ...string) string {
 	return mdi.BaseMetadataIdentifier.getFilePathKey(mdi.revision)
 }