diff --git a/generated/xg-pondownstreammanagementperformancemonitoringhistorydata.go b/generated/xg-pondownstreammanagementperformancemonitoringhistorydata.go
new file mode 100644
index 0000000..b861f30
--- /dev/null
+++ b/generated/xg-pondownstreammanagementperformancemonitoringhistorydata.go
@@ -0,0 +1,160 @@
+/*
+ * Copyright (c) 2018 - present.  Boling Consulting Solutions (bcsw.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * NOTE: This file was generated, manual edits will be overwritten!
+ *
+ * Generated by 'goCodeGenerator.py':
+ *              https://github.com/cboling/OMCI-parser/README.md
+ */
+
+package generated
+
+import "github.com/deckarep/golang-set"
+
+// XgPonDownstreamManagementPerformanceMonitoringHistoryDataClassID is the 16-bit ID for the OMCI
+// Managed entity XG-PON downstream management performance monitoring history data
+const XgPonDownstreamManagementPerformanceMonitoringHistoryDataClassID ClassID = ClassID(345)
+
+var xgpondownstreammanagementperformancemonitoringhistorydataBME *ManagedEntityDefinition
+
+// XgPonDownstreamManagementPerformanceMonitoringHistoryData (class ID #345)
+//	This ME collects PM data associated with the XG-PON TC layer. It collects counters associated
+//	with downstream PLOAM and OMCI messages.
+//
+//	For a complete discussion of generic PM architecture, refer to clause I.4.
+//
+//	Relationships
+//		An instance of this ME is associated with an ANI-G.
+//
+//	Attributes
+//		Managed Entity Id
+//			Managed entity ID: This attribute uniquely identifies each instance of this ME. Through an
+//			identical ID, this ME is implicitly linked to an instance of the ANI-G. (R, set-by-create)
+//			(mandatory) (2-bytes)
+//
+//		Interval End Time
+//			Interval end time: This attribute identifies the most recently finished 15-min interval. (R)
+//			(mandatory) (1-byte)
+//
+//		Threshold Data 1_2 Id
+//			Threshold data 1/2 ID: This attribute points to an instance of the threshold data 1 ME that
+//			contains PM threshold values. Since no threshold value attribute number exceeds 7, a threshold
+//			data 2 ME is optional. (R,-W, set-by-create) (mandatory) (2-bytes)
+//
+//		Ploam Message Integrity Check Mic Error Count
+//			PLOAM message integrity check (MIC) error count: This attribute counts MIC errors detected in
+//			downstream PLOAM messages, either directed to this ONU or broadcast to all ONUs. (R) (optional)
+//			(4-bytes)
+//
+//		Downstream Ploam Messages Count
+//			Downstream PLOAM messages count: This attribute counts PLOAM messages received, either directed
+//			to this ONU or broadcast to all ONUs. (R) (optional) (4-bytes)
+//
+//		Profile Messages Received
+//			Profile messages received: This attribute counts the number of profile messages received, either
+//			directed to this ONU or broadcast to all ONUs. In [ITU-T G.9807.1], this attribute is used for
+//			received burst_profile message count.  (R) (optional) (4-bytes)
+//
+//		Ranging_Time Messages Received
+//			Ranging_time messages received: This attribute counts the number of ranging_time messages
+//			received, either directed to this ONU or broadcast to all ONUs. (R) (mandatory) (4-bytes)
+//
+//		Deactivate_Onu_Id Messages Received
+//			Deactivate_ONU-ID messages received: This attribute counts the number of deactivate_ONU-ID
+//			messages received, either directed to this ONU or broadcast to all ONUs. Deactivate_ONU-ID
+//			messages do not reset this counter. (R) (optional) (4-bytes)
+//
+//		Disable_Serial_Number Messages Received
+//			Disable_serial_number messages received: This attribute counts the number of
+//			disable_serial_number messages received, whose serial number specified this ONU. (R) (optional)
+//			(4-bytes)
+//
+//		Request_Registration Messages Received
+//			Request_registration messages received: This attribute counts the number of request_registration
+//			messages received. (R) (optional) (4-bytes)
+//
+//		Assign_Alloc_Id Messages Received
+//			Assign_alloc-ID messages received: This attribute counts the number of assign_alloc-ID messages
+//			received. (R) (optional) (4-bytes)
+//
+//		Key_Control Messages Received
+//			Key_control messages received: This attribute counts the number of key_control messages
+//			received, either directed to this ONU or broadcast to all ONUs. (R) (optional) (4-bytes)
+//
+//		Sleep_Allow Messages Received
+//			Sleep_allow messages received: This attribute counts the number of sleep_allow messages
+//			received, either directed to this ONU or broadcast to all ONUs. (R) (optional) (4-bytes)
+//
+//		Baseline Omci Messages Received Count
+//			Baseline OMCI messages received count: This attribute counts the number of OMCI messages
+//			received in the baseline message format. (R) (optional) (4-bytes)
+//
+//		Extended Omci Messages Received Count
+//			Extended OMCI messages received count: This attribute counts the number of OMCI messages
+//			received in the extended message format. (R) (optional) (4-bytes)
+//
+//		Assign_Onu_Id Messages Received
+//			Assign_ONU-ID messages received: This attribute counts the number of assign_ONU-ID messages
+//			received since the last re-boot. (R) (optional) (4-bytes)
+//
+//		Omci Mic Error Count
+//			OMCI MIC error count: This attribute counts MIC errors detected in OMCI messages directed to
+//			this ONU. (R) (optional) (4-bytes)
+//
+type XgPonDownstreamManagementPerformanceMonitoringHistoryData struct {
+	ManagedEntityDefinition
+	Attributes AttributeValueMap
+}
+
+func init() {
+	xgpondownstreammanagementperformancemonitoringhistorydataBME = &ManagedEntityDefinition{
+		Name:    "XgPonDownstreamManagementPerformanceMonitoringHistoryData",
+		ClassID: 345,
+		MessageTypes: mapset.NewSetWith(
+			Create,
+			Delete,
+			Get,
+			Set,
+		),
+		AllowedAttributeMask: 0xffff,
+		AttributeDefinitions: AttributeDefinitionMap{
+			0:  Uint16Field("ManagedEntityId", PointerAttributeType, 0x0000, 0, mapset.NewSetWith(Read, SetByCreate), false, false, false, 0),
+			1:  ByteField("IntervalEndTime", UnsignedIntegerAttributeType, 0x8000, 0, mapset.NewSetWith(Read), false, false, false, 1),
+			2:  Uint16Field("ThresholdData12Id", PointerAttributeType, 0x4000, 0, mapset.NewSetWith(Read, SetByCreate, Write), false, false, false, 2),
+			3:  Uint32Field("PloamMessageIntegrityCheckMicErrorCount", CounterAttributeType, 0x2000, 0, mapset.NewSetWith(Read), false, true, false, 3),
+			4:  Uint32Field("DownstreamPloamMessagesCount", CounterAttributeType, 0x1000, 0, mapset.NewSetWith(Read), false, true, false, 4),
+			5:  Uint32Field("ProfileMessagesReceived", CounterAttributeType, 0x0800, 0, mapset.NewSetWith(Read), false, true, false, 5),
+			6:  Uint32Field("RangingTimeMessagesReceived", CounterAttributeType, 0x0400, 0, mapset.NewSetWith(Read), false, false, false, 6),
+			7:  Uint32Field("DeactivateOnuIdMessagesReceived", CounterAttributeType, 0x0200, 0, mapset.NewSetWith(Read), false, true, false, 7),
+			8:  Uint32Field("DisableSerialNumberMessagesReceived", CounterAttributeType, 0x0100, 0, mapset.NewSetWith(Read), false, true, false, 8),
+			9:  Uint32Field("RequestRegistrationMessagesReceived", CounterAttributeType, 0x0080, 0, mapset.NewSetWith(Read), false, true, false, 9),
+			10: Uint32Field("AssignAllocIdMessagesReceived", CounterAttributeType, 0x0040, 0, mapset.NewSetWith(Read), false, true, false, 10),
+			11: Uint32Field("KeyControlMessagesReceived", CounterAttributeType, 0x0020, 0, mapset.NewSetWith(Read), false, true, false, 11),
+			12: Uint32Field("SleepAllowMessagesReceived", CounterAttributeType, 0x0010, 0, mapset.NewSetWith(Read), false, true, false, 12),
+			13: Uint32Field("BaselineOmciMessagesReceivedCount", CounterAttributeType, 0x0008, 0, mapset.NewSetWith(Read), false, true, false, 13),
+			14: Uint32Field("ExtendedOmciMessagesReceivedCount", CounterAttributeType, 0x0004, 0, mapset.NewSetWith(Read), false, true, false, 14),
+			15: Uint32Field("AssignOnuIdMessagesReceived", CounterAttributeType, 0x0002, 0, mapset.NewSetWith(Read), false, true, false, 15),
+			16: Uint32Field("OmciMicErrorCount", CounterAttributeType, 0x0001, 0, mapset.NewSetWith(Read), false, true, false, 16),
+		},
+		Access:  CreatedByOlt,
+		Support: UnknownSupport,
+	}
+}
+
+// NewXgPonDownstreamManagementPerformanceMonitoringHistoryData (class ID 345) creates the basic
+// Managed Entity definition that is used to validate an ME of this type that
+// is received from or transmitted to the OMCC.
+func NewXgPonDownstreamManagementPerformanceMonitoringHistoryData(params ...ParamData) (*ManagedEntity, OmciErrors) {
+	return NewManagedEntity(*xgpondownstreammanagementperformancemonitoringhistorydataBME, params...)
+}