+/** \ingroup TRACE_category
+ * \brief Declare a new category with a random color.
+ *
+ * This function should be used to define a user category. The
+ * category can be used to differentiate the tasks that are created
+ * during the simulation (for example, tasks from server1, server2,
+ * or request tasks, computation tasks, communication tasks). All
+ * resource utilization (host power and link bandwidth) will be
+ * classified according to the task category. Tasks that do not
+ * belong to a category are not traced. The color for the category
+ * that is being declared is random. This function has no effect
+ * if a category with the same name has been already declared.
+ *
+ * See \ref tracing_tracing for details on how to trace
+ * the (categorized) resource utilization.
+ *
+ * \param category The name of the new tracing category to be created.
+ *
+ * \see TRACE_category_with_color, MSG_task_set_category
+ */