diff --git a/PROTOBUF/tapi-streaming-performance.proto b/PROTOBUF/tapi-streaming-performance.proto
new file mode 100644
index 00000000..84ab69ad
--- /dev/null
+++ b/PROTOBUF/tapi-streaming-performance.proto
@@ -0,0 +1,137 @@
+//
+// Copyright (c) 2025 Linux Foundation (LF). All rights reserved.
+//
+// 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.
+//
+
+syntax = "proto3";
+
+//
+// This package defines message types used to represent a performance measurement record
+// in a TAPI stream as per the specifications in TR-548.
+//
+package tapi;
+
+option java_multiple_files = true;
+option java_outer_classname = "TapiGnmi";
+option java_package = "org.linuxfoundation.onmi.tapi";
+
+message StreamDetails {
+     MeasurementDetails measurement_details = 1 [json_name = "measurement-details"];
+}
+message MeasurementDetails {
+     uint64 time_measurement_was_sampled  = 1 [json_name = "time-measurement-was-sampled"]; 
+     QualifiedMeasuredValue qualified_measured_value = 2 [json_name = "qualified-measured-value"]; 
+     string native_resource_id = 3 [json_name = "native-resource-id"];
+     SampleQualifier sample_qualifier = 4 [json_name = "sample-qualifier"]; 
+     RelativePosition relative_position_of_measurement = 5 [json_name = "relative-position-of-measurement"]; 
+     DirectionOfMeasuredSignal direction_of_measured_signal = 6 [json_name = "direction-of-measured-signal"]; 
+     uint64 sample_interval = 7 [json_name = "sample-interval"];
+     string abstract_resource_ref = 8 [json_name = "abstract-resource-ref"]; 
+     string native_measurement_type = 9 [json_name = "native-measurement-type"];
+     NormalizedMeasurementType normalized_measurement_type = 10 [json_name = "normalized-measurement-type"];
+     repeated QualifiedMeasurement qualified_measurement = 11 [json_name = "qualified-measurement"];
+     string connection_end_point = 12 [json_name = "connection-end-point"];
+     string maintenance_intermediate_point = 13 [json_name = "maintenance-intermediate-point"];
+     string maintenance_end_point = 14 [json_name = "maintenance-end-point"];
+     uint64 measurement_start_time = 15 [json_name = "measurement-start-time"];
+     repeated QualifiedMeasuredValue qualified_measured_value_set = 16 [json_name = "qualified-measured-value-set"];
+}    
+message QualifiedMeasurement {
+     uint64 time_measurement_was_sampled  = 1 [json_name = "time-measurement-was-sampled"]; 
+     QualifiedMeasuredValue qualified_measured_value = 2 [json_name = "qualified-measured-value"]; 
+     string native_resource_id = 3 [json_name = "native-resource-id"];
+     SampleQualifier sample_qualifier = 4 [json_name = "sample-qualifier"]; 
+     RelativePosition relative_position_of_measurement = 5 [json_name = "relative-position-of-measurement"]; 
+     DirectionOfMeasuredSignal direction_of_measured_signal = 6 [json_name = "direction-of-measured-signal"]; 
+     uint64 sample_interval = 7 [json_name = "sample-interval"];
+     string abstract_resource_ref = 8 [json_name = "abstract-resource-ref"]; 
+     string native_measurement_type = 9 [json_name = "native-measurement-type"];
+     NormalizedMeasurementType normalized_measurement_type = 10 [json_name = "normalized-measurement-type"];
+     uint64 list_index = 11 [json_name ="list-index"];
+     string connection_end_point = 12 [json_name = "connection-end-point"];
+     string maintenance_intermediate_point = 13 [json_name = "maintenance-intermediate-point"];
+     string maintenance_end_point = 14 [json_name = "maintenance-end-point"];
+     uint64 measurement_start_time = 15 [json_name = "measurement-start-time"];
+     repeated QualifiedMeasuredValue qualified_measured_value_set = 16 [json_name = "qualified-measured-value-set"];
+}  
+message QualifiedMeasuredValue {
+     double value = 1 [json_name = "value"];
+     ValueQualifier value_qualifier = 2 [json_name = "value-qualifier"];
+     string units = 3 [json_name = "units"];
+     string qualified_value_name = 4 [json_name = "qualified-value-name"];
+     string qualified_location_name = 5 [json_name = "qualified-location-name"];
+     string qualified_measurement_type = 6 [json_name = "qualified-measurement-type"];
+}
+enum ValueQualifier {
+     OK = 0;
+     INVALID = 1;
+     SUSPECT = 2;
+     MISSING = 3;
+     PARTIAL = 4;
+}
+enum RelativePosition {
+     NEAR_END = 0;
+     FAR_END = 1;
+     NOT_APPLICABLE = 2;
+     ALL_LOCATIONS = 3;
+}
+enum DirectionOfMeasuredSignal {
+     NO_DIRECTION = 0;
+     RECEIVE = 1;
+     TRANSMIT = 2;
+     RECEIVE_AND_TRANSMIT = 3;
+     CONTRA_RECEIVE = 4;
+     CONTRA_TRANSMIT = 5;
+     CONTRA_RECEIVE_AND_CONTRA_TRANSMIT = 6;
+}   
+enum SampleQualifier {
+     NORMAL = 0;
+     DELAYED = 1;
+     FINAL = 2;
+     FIRST = 3;
+     BASELINE=4;
+}
+
+enum NormalizedMeasurementType {
+     NO_NORMALIZED_TYPE = 0;
+     BBE = 1;
+     CHROM_DISP = 2;
+     DELAY_FRAME_COUNT = 3;
+     DIFF_GROUP_DELAY = 4;
+     FEC_CORRECTABLE_BLOCKS = 5;
+     FEC_CORRECTED_BITS = 6;
+     FEC_CORRECTED_BYTES = 7;
+     FEC_CORRECTED_CODEWORDS = 8;
+     FEC_CORRECTED_ERRORS = 9;
+     FEC_POST_FEC_BER = 10;
+     FEC_PRE_FEC_BER = 11;
+     FEC_SYMBOL_ERRORS = 12;
+     FEC_UNCORRECTABLE_BITS = 13;
+     FEC_UNCORRECTABLE_BLOCKS = 14;
+     FEC_UNCORRECTABLE_BYTES = 15;
+     FEC_UNCORRECTABLE_WORDS = 16;
+     FEC_UNCORRECTED_CODEWORDS = 17;
+     FREQ_OFFS = 18;
+     OPTICAL_GAIN = 19;
+     OPT_PWR_SPECTR_DENS_INPUT = 20;
+     OPT_PWR_SPECTR_DENS_OUTPUT = 21;
+     OPT_TOTAL_PWR_INPUT = 22;
+     OPT_TOTAL_PWR_OUTPUT = 23;
+     OPTICAL_TILT = 24;
+     POL_MODE_DISP = 25;
+     SES = 26;
+     UAS = 27;
+     VOA_INPUT = 28;
+     VOA_OUTPUT = 29;
+}
diff --git a/YANG/tapi-common.yang b/YANG/tapi-common.yang
index 711d1a8b..bbf06be5 100644
--- a/YANG/tapi-common.yang
+++ b/YANG/tapi-common.yang
@@ -154,6 +154,7 @@ module tapi-common {
         leaf profile-uuid {
             type leafref {
                 path '/tapi-common:context/tapi-common:profile/tapi-common:uuid';
+                require-instance false;
             }
             description "none";
         }
diff --git a/YANG/tapi-connectivity.yang b/YANG/tapi-connectivity.yang
index 8fbb8fbd..ae41b762 100644
--- a/YANG/tapi-connectivity.yang
+++ b/YANG/tapi-connectivity.yang
@@ -379,6 +379,7 @@ module tapi-connectivity {
         leaf connection-end-point-uuid {
             type leafref {
                 path '/tapi-common:context/tapi-topology:topology-context/tapi-topology:topology/tapi-topology:node/tapi-topology:owned-node-edge-point/tapi-connectivity:cep-list/tapi-connectivity:connection-end-point/tapi-connectivity:uuid';
+                require-instance false;
             }
             description "none";
         }
@@ -400,6 +401,7 @@ module tapi-connectivity {
         leaf switch-control-uuid {
             type leafref {
                 path '/tapi-common:context/tapi-connectivity:connectivity-context/tapi-connectivity:connection/tapi-connectivity:switch-control/tapi-connectivity:uuid';
+                require-instance false;
             }
             description "none";
         }
@@ -410,6 +412,7 @@ module tapi-connectivity {
         leaf switch-local-id {
             type leafref {
                 path '/tapi-common:context/tapi-connectivity:connectivity-context/tapi-connectivity:connection/tapi-connectivity:switch-control/tapi-connectivity:switch/tapi-connectivity:local-id';
+                require-instance false;
             }
             description "none";
         }
@@ -420,6 +423,7 @@ module tapi-connectivity {
         leaf route-local-id {
             type leafref {
                 path '/tapi-common:context/tapi-connectivity:connectivity-context/tapi-connectivity:connection/tapi-connectivity:route/tapi-connectivity:local-id';
+                require-instance false;
             }
             description "none";
         }
diff --git a/YANG/tapi-topology.yang b/YANG/tapi-topology.yang
index 87c73883..693c62e9 100644
--- a/YANG/tapi-topology.yang
+++ b/YANG/tapi-topology.yang
@@ -346,6 +346,7 @@ module tapi-topology {
         leaf topology-uuid {
             type leafref {
                 path '/tapi-common:context/tapi-topology:topology-context/tapi-topology:topology/tapi-topology:uuid';
+                require-instance false;
             }
             description "none";
         }
@@ -366,6 +367,7 @@ module tapi-topology {
         leaf node-uuid {
             type leafref {
                 path '/tapi-common:context/tapi-topology:topology-context/tapi-topology:topology/tapi-topology:node/tapi-topology:uuid';
+                require-instance false;
             }
             description "none";
         }