diff --git a/generated/galethernetperformancemonitoringhistorydata.go b/generated/galethernetperformancemonitoringhistorydata.go
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+++ b/generated/galethernetperformancemonitoringhistorydata.go
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+/*
+ * 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"
+
+// GalEthernetPerformanceMonitoringHistoryDataClassID is the 16-bit ID for the OMCI
+// Managed entity GAL Ethernet performance monitoring history data
+const GalEthernetPerformanceMonitoringHistoryDataClassID ClassID = ClassID(276)
+
+var galethernetperformancemonitoringhistorydataBME *ManagedEntityDefinition
+
+// GalEthernetPerformanceMonitoringHistoryData (class ID #276)
+//	This ME collects PM data associated with a GEM IW TP when the GEM layer supports an Ethernet
+//	service. Instances of this ME are created and deleted by the OLT.
+//
+//	For a complete discussion of generic PM architecture, refer to clause I.4.
+//
+//	Relationships
+//		An instance of this ME is associated with an instance of the GEM IW TP ME.
+//
+//	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 GEM IW TP. (R, setbycreate)
+//			(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, setbycreate) (mandatory) (2-bytes)
+//
+//		Discarded Frames
+//			Discarded frames: This attribute counts the number of downstream GEM frames discarded for any
+//			reason [erroneous frame check sequence (FCS), too long length, buffer overflow, etc.]. (R)
+//			(mandatory) (4-bytes)
+//
+type GalEthernetPerformanceMonitoringHistoryData struct {
+	ManagedEntityDefinition
+	Attributes AttributeValueMap
+}
+
+func init() {
+	galethernetperformancemonitoringhistorydataBME = &ManagedEntityDefinition{
+		Name:    "GalEthernetPerformanceMonitoringHistoryData",
+		ClassID: 276,
+		MessageTypes: mapset.NewSetWith(
+			Create,
+			Delete,
+			Get,
+			Set,
+		),
+		AllowedAttributeMask: 0xe000,
+		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("DiscardedFrames", CounterAttributeType, 0x2000, 0, mapset.NewSetWith(Read), false, false, false, 3),
+		},
+		Access:  CreatedByOlt,
+		Support: UnknownSupport,
+	}
+}
+
+// NewGalEthernetPerformanceMonitoringHistoryData (class ID 276) 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 NewGalEthernetPerformanceMonitoringHistoryData(params ...ParamData) (*ManagedEntity, OmciErrors) {
+	return NewManagedEntity(*galethernetperformancemonitoringhistorydataBME, params...)
+}