May I know what does 'event corelator' (appears every second line of each paragraph) mean in db2audit output. Thanks.

timestamp=2007-10-13-04.30.15.035726;category=SYSADMIN;audit event=GET_SNAPSHOT;
event correlator=4;event status=0;
userid=cardinst;authid=CARDINST;
origin node=0;coordinator node=2;
application id=*N2.cardinst.071012223015;application name=db2acd 2;

timestamp=2007-10-13-04.30.15.037420;category=CONTEXT;audit event=DETACH;
event correlator=5;
userid=cardinst;authid=CARDINST;
origin node=0;coordinator node=2;
application id=*N2.cardinst.071012223015;application name=db2acd 2;

timestamp=2007-10-13-04.30.15.175834;category=CONTEXT;audit event=EXECUTE_IMMEDIATE;
event correlator=4;
database=CARD;userid=carduser;authid=CARDUSER;
origin node=0;coordinator node=0;
application id=*N0.cardinst.071012222915;application name=db2bp;
package schema=NULLID;package name=SQLC2F0A;
package section=203;text=delete from etl.T_VIN_CNTRY;