LTTV_FILTER_EVENT_CATEGORY, /**< FIXME: not implemented */
LTTV_FILTER_EVENT_TIME, /**< event.time (double) */
LTTV_FILTER_EVENT_TSC, /**< event.tsc (double) */
+ LTTV_FILTER_EVENT_TARGET_PID, /**< event.target_pid (guint) */
LTTV_FILTER_EVENT_FIELD, /**< dynamic field, specified in facility */
LTTV_FILTER_UNDEFINED /**< undefined field */
};