diff --git a/internal/core/translation.go b/internal/core/translation.go
new file mode 100644
index 0000000..bc7c692
--- /dev/null
+++ b/internal/core/translation.go
@@ -0,0 +1,67 @@
+/*
+* Copyright 2022-present Open Networking Foundation
+
+* 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.
+ */
+
+package core
+
+import (
+	"fmt"
+
+	"github.com/opencord/voltha-protos/v5/go/voltha"
+)
+
+const (
+	DeviceAggregationModel = "bbf-device-aggregation"
+	DevicesPath            = "/" + DeviceAggregationModel + ":devices"
+	DeviceTypeOlt          = "bbf-device-types:olt"
+	DeviceTypeOnu          = "bbf-device-types:onu"
+)
+
+type YangItem struct {
+	Path  string
+	Value string
+}
+
+//getDevicePath returns the yang path to the root of the device with a specific ID
+func getDevicePath(id string) string {
+	return fmt.Sprintf("%s/device[name='%s']", DevicesPath, id)
+}
+
+//translateDevice returns a slice of yang items that represent a voltha device
+func translateDevice(device voltha.Device) []YangItem {
+	devicePath := getDevicePath(device.Id)
+
+	typeItem := YangItem{}
+	typeItem.Path = fmt.Sprintf("%s/type", devicePath)
+
+	if device.Root {
+		typeItem.Value = DeviceTypeOlt
+	} else {
+		typeItem.Value = DeviceTypeOnu
+	}
+
+	return []YangItem{typeItem}
+}
+
+//translateDevices returns a slice of yang items that represent a list of voltha devices
+func translateDevices(devices voltha.Devices) []YangItem {
+	result := []YangItem{}
+
+	for _, device := range devices.Items {
+		result = append(result, translateDevice(*device)...)
+	}
+
+	return result
+}