-XBT_PUBLIC(void*) sg_host_user(sg_host_t host);
-XBT_PUBLIC(void) sg_host_user_set(sg_host_t host, void* userdata);
-XBT_PUBLIC(void) sg_host_user_destroy(sg_host_t host);
+/** @ingroup m_host_management
+ *
+ * @brief Return the user data of a #sg_host_t.
+ *
+ * This functions returns the user data associated to @a host if it is possible.
+ */
+XBT_PUBLIC void* sg_host_user(sg_host_t host);
+/** @ingroup m_host_management
+ *
+ * @brief Set the user data of a #sg_host_t.
+ *
+ * This functions attach @a data to @a host if it is possible.
+ */
+XBT_PUBLIC void sg_host_user_set(sg_host_t host, void* userdata);
+XBT_PUBLIC void sg_host_user_destroy(sg_host_t host);