+ * Initialize NSMessage struct.\r
+ * Service sets mandatory fields which message id and provider(device) id are filled with.\r
+ * @return ::NSMessage *\r
+ */\r
+NSMessage * NSCreateMessage();\r
+\r
+/**\r
+ * Add topic to topic list which is located in provider service storage\r
+ * @param[in] topicName Topic name to add\r
+ * @return ::NS_OK if the action is requested succesfully or NS_FAIL if wrong parameter is set.\r
+ */\r
+NSResult NSProviderRegisterTopic(const char * topicName);\r
+\r
+/**\r
+ * Delete topic from topic list\r
+ * @param[in] topicName Topic name to delete\r
+ * @return ::NS_OK if the action is requested succesfully or NS_FAIL if wrong parameter is set.\r
+ */\r
+NSResult NSProviderUnregisterTopic(const char * topicName);\r
+\r
+/**\r
+ * Select a topic name for a consumer\r
+ * @param[in] consumerId consumer id for which the user on provider selects a topic\r
+ * @param[in] topicName Topic name to select\r
+ * @return ::NS_OK if the action is requested succesfully or NS_FAIL if subContollability is false\r
+ */\r
+NSResult NSProviderSetConsumerTopic(const char * consumerId, const char * topicName);\r
+\r
+/**\r
+ * Unselect a topic from the topic list for consumer\r
+ * @param[in] consumerId consumer id for which the user on provider unselects a topic\r
+ * @param[in] topicName Topic name to unselect\r
+ * @return ::NS_OK if the action is requested succesfully or NS_FAIL if subContollability is false\r
+ */\r
+NSResult NSProviderUnsetConsumerTopic(const char * consumerId, const char * topicName);\r
+\r
+/**\r
+ * Request topic list with selection state for the consumer\r
+ * @param[in] consumerid the id of consumer which topic list is subscribed for\r
+ * @return :: Topic list\r
+ */\r
+NSTopicLL * NSProviderGetConsumerTopics(const char * consumerId);\r
+\r
+/**\r
+ * Request topics list already registered by provider user\r
+ * @return :: Topic list\r