diff --git a/generated/ethernetframeperformancemonitoringhistorydatadownstream.go b/generated/ethernetframeperformancemonitoringhistorydatadownstream.go
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+++ b/generated/ethernetframeperformancemonitoringhistorydatadownstream.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"
+
+// EthernetFramePerformanceMonitoringHistoryDataDownstreamClassID is the 16-bit ID for the OMCI
+// Managed entity Ethernet frame performance monitoring history data downstream
+const EthernetFramePerformanceMonitoringHistoryDataDownstreamClassID ClassID = ClassID(321)
+
+var ethernetframeperformancemonitoringhistorydatadownstreamBME *ManagedEntityDefinition
+
+// EthernetFramePerformanceMonitoringHistoryDataDownstream (class ID #321)
+//	This ME is identical to the Ethernet frame PM history data upstream ME, with the exception that
+//	it monitors downstream traffic.
+//
+//	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 a MAC bridge port configuration
+//			data. (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)
+//
+//		Drop Events
+//			Drop events:	The total number of events in which packets were dropped due to a lack of
+//			resources. This is not necessarily the number of packets dropped; it is the number of times this
+//			event was detected. (R) (mandatory) (4-bytes)
+//
+//		Octets
+//			Octets:	The total number of upstream octets received, including those in bad packets, excluding
+//			framing bits, but including FCS. (R) (mandatory) (4-bytes)
+//
+//		Packets
+//			Packets:	The total number of upstream packets received, including bad packets, broadcast packets
+//			and multicast packets. (R) (mandatory) (4-bytes)
+//
+//		Broadcast Packets
+//			Broadcast packets: The total number of upstream good packets received that were directed to the
+//			broadcast address. This does not include multicast packets. (R) (mandatory) (4-bytes)
+//
+//		Multicast Packets
+//			Multicast packets: The total number of upstream good packets received that were directed to a
+//			multicast address. This does not include broadcast packets. (R) (mandatory) (4-bytes)
+//
+//		Crc Errored Packets
+//			CRC errored packets: The total number of upstream packets received that had a length (excluding
+//			framing bits, but including FCS octets) of between 64-octets and 1518-octets, inclusive, but had
+//			either a bad FCS with an integral number of octets (FCS error) or a bad FCS with a non-integral
+//			number of octets (alignment error). (R) (mandatory) (4-bytes)
+//
+//		Undersize Packets
+//			Undersize packets: The total number of upstream packets received that were less than 64-octets
+//			long, but were otherwise well formed (excluding framing bits, but including FCS). (R)
+//			(mandatory) (4-bytes)
+//
+//		Oversize Packets
+//			NOTE 2 - If 2-000-byte Ethernet frames are supported, counts in this performance parameter are
+//			not necessarily errors.
+//
+//		Packets 64 Octets
+//			Packets 64 octets: The total number of upstream received packets (including bad packets) that
+//			were 64-octets long, excluding framing bits but including FCS. (R) (mandatory) (4-bytes)
+//
+//		Packets 65 To 127 Octets
+//			Packets 65 to 127 octets: The total number of upstream received packets (including bad packets)
+//			that were 65..127 octets long, excluding framing bits but including FCS. (R) (mandatory)
+//			(4-bytes)
+//
+//		Packets 128 To 255 Octets
+//			Packets 128 to 255 octets: The total number of upstream packets (including bad packets) received
+//			that were 128..255 octets long, excluding framing bits but including FCS. (R) (mandatory)
+//			(4-bytes)
+//
+//		Packets 256 To 511 Octets
+//			Packets 256 to 511 octets: The total number of upstream packets (including bad packets) received
+//			that were 256..511 octets long, excluding framing bits but including FCS. (R) (mandatory)
+//			(4-bytes)
+//
+//		Packets 512 To 1023 Octets
+//			Packets 512 to 1023 octets: The total number of upstream packets (including bad packets)
+//			received that were 512..1-023 octets long, excluding framing bits but including FCS. (R)
+//			(mandatory) (4-bytes)
+//
+//		Packets 1024 To 1518 Octets
+//			Packets 1024 to 1518 octets: The total number of upstream packets (including bad packets)
+//			received that were 1024..1518 octets long, excluding framing bits, but including FCS. (R)
+//			(mandatory) (4-bytes)
+//
+type EthernetFramePerformanceMonitoringHistoryDataDownstream struct {
+	ManagedEntityDefinition
+	Attributes AttributeValueMap
+}
+
+func init() {
+	ethernetframeperformancemonitoringhistorydatadownstreamBME = &ManagedEntityDefinition{
+		Name:    "EthernetFramePerformanceMonitoringHistoryDataDownstream",
+		ClassID: 321,
+		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("DropEvents", CounterAttributeType, 0x2000, 0, mapset.NewSetWith(Read), false, false, false, 3),
+			4:  Uint32Field("Octets", CounterAttributeType, 0x1000, 0, mapset.NewSetWith(Read), false, false, false, 4),
+			5:  Uint32Field("Packets", CounterAttributeType, 0x0800, 0, mapset.NewSetWith(Read), false, false, false, 5),
+			6:  Uint32Field("BroadcastPackets", CounterAttributeType, 0x0400, 0, mapset.NewSetWith(Read), false, false, false, 6),
+			7:  Uint32Field("MulticastPackets", CounterAttributeType, 0x0200, 0, mapset.NewSetWith(Read), false, false, false, 7),
+			8:  Uint32Field("CrcErroredPackets", CounterAttributeType, 0x0100, 0, mapset.NewSetWith(Read), false, false, false, 8),
+			9:  Uint32Field("UndersizePackets", CounterAttributeType, 0x0080, 0, mapset.NewSetWith(Read), false, false, false, 9),
+			10: Uint32Field("OversizePackets", CounterAttributeType, 0x0040, 0, mapset.NewSetWith(Read), false, false, false, 10),
+			11: Uint32Field("Packets64Octets", CounterAttributeType, 0x0020, 0, mapset.NewSetWith(Read), false, false, false, 11),
+			12: Uint32Field("Packets65To127Octets", CounterAttributeType, 0x0010, 0, mapset.NewSetWith(Read), false, false, false, 12),
+			13: Uint32Field("Packets128To255Octets", CounterAttributeType, 0x0008, 0, mapset.NewSetWith(Read), false, false, false, 13),
+			14: Uint32Field("Packets256To511Octets", CounterAttributeType, 0x0004, 0, mapset.NewSetWith(Read), false, false, false, 14),
+			15: Uint32Field("Packets512To1023Octets", CounterAttributeType, 0x0002, 0, mapset.NewSetWith(Read), false, false, false, 15),
+			16: Uint32Field("Packets1024To1518Octets", CounterAttributeType, 0x0001, 0, mapset.NewSetWith(Read), false, false, false, 16),
+		},
+		Access:  CreatedByOlt,
+		Support: UnknownSupport,
+	}
+}
+
+// NewEthernetFramePerformanceMonitoringHistoryDataDownstream (class ID 321) 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 NewEthernetFramePerformanceMonitoringHistoryDataDownstream(params ...ParamData) (*ManagedEntity, OmciErrors) {
+	return NewManagedEntity(*ethernetframeperformancemonitoringhistorydatadownstreamBME, params...)
+}