diff --git a/inc/taimetadatatypes.h b/inc/taimetadatatypes.h
index 4d4c6cc..3806d82 100644
--- a/inc/taimetadatatypes.h
+++ b/inc/taimetadatatypes.h
@@ -187,6 +187,10 @@ typedef enum _tai_attr_value_type_t
      */
     TAI_ATTR_VALUE_TYPE_NOTIFICATION,
 
+    /*
+     * @brief Attribute value is list of enums.
+     */
+    TAI_ATTR_VALUE_TYPE_ENUMLIST,
 } tai_attr_value_type_t;
 
 /**
diff --git a/inc/tainetworkif.h b/inc/tainetworkif.h
index 3051710..4e128a9 100644
--- a/inc/tainetworkif.h
+++ b/inc/tainetworkif.h
@@ -322,6 +322,27 @@ typedef enum _tai_network_interface_attr_t
      */
     TAI_NETWORK_INTERFACE_ATTR_CLIENT_SIGNAL_MAPPING_TYPE,
 
+    /**
+     * @brief The implementation templates
+     *
+     * Implementation templates represent the list of transmission modes
+     * supported by the network interface. Implementation templates are
+     * described as a list of enum lists, and each transmission mode is
+     * expressed as a combination of enum values. Each enum list has an enum id
+     * (attribute id) and a list of enum values. The i-th transmission mode is a
+     * combination of i-th values of each enum list.
+     *
+     * Implementation templates also represent the preference among the
+     * transmission modes. When only a part of the parameters corresponds to the
+     * transmission mode is configured, then the first mode that matches the
+     * current configured value will be used. Therefore the head of the list is
+     * the default mode.
+     *
+     * @type #tai_attr_value_list_t #tai_enum_list_t
+     * @flags READ_ONLY
+     */
+    TAI_NETWORK_INTERFACE_ATTR_IMPLEMENTATION_TEMPLATES,
+
     /**
      * @brief The current pre-FEC bit error rate
      *
diff --git a/inc/taitypes.h b/inc/taitypes.h
index e489536..22c04c0 100644
--- a/inc/taitypes.h
+++ b/inc/taitypes.h
@@ -250,6 +250,12 @@ typedef struct _tai_notification_handler_t {
     tai_notification_fn notify;
 } tai_notification_handler_t;
 
+typedef struct _tai_enum_list_t {
+    tai_attr_id_t id;
+    uint32_t count;
+    int32_t *list;
+} tai_enum_list_t;
+
 /**
  * @brief Data Type
  *
@@ -286,6 +292,7 @@ typedef union _tai_attribute_value_t
     tai_object_map_list_t objmaplist;
     tai_attr_value_list_t attrlist;
     tai_notification_handler_t notification;
+    tai_enum_list_t enumlist;
 } tai_attribute_value_t;
 
 typedef struct _tai_attribute_t