FIRST_TIME and NEXT_TIME columns in v$archived_log view

Question

Oracle Version      : 11.2
OS Platform      : Solaris 10
Could anyone please explain what FIRST_TIME and NEXT_TIME columns in v$archived_log are?
Oracle Documentation (below) and googling didn't help.
http://docs.oracle.com/cd/E18283_01/server.112/e17110/dynviews_1016.htm
Did quite understand what
FIRST_TIME      DATE      Timestamp of the first change
NEXT_TIME      DATE      Timestamp of the next changeis.
Did a search on OTN as well. A similair OTN post unfortunately ended up in Abuse and Insults !
description of NEXT_TIME colume in V$ARCHIVED_LOG View

Answer 1

For each archive log file, there would be First_time & Next_time.
first_time refers to the timestamp when when first SCN is recorded, Also next_time refers to the timestamp of the next archivelog change.
Here next_change/next_time of archive value is equal to the next logs first_change/first_time.
SEQUENCE#         FIRST_CHANGE# TO_CHAR(FIRST_TIME,'DD-MON-YYYYHH24:MI:SS')                                          NEXT_CHANGE# TO_CHAR(NEXT_TIME,'DD-MON-YYYYHH24:MI:SS')
    116329            1042518947 16-DEC-2011 04:05:16                                                                   1042534917 16-DEC-2011 04:07:04
    116330            1042534917 16-DEC-2011 04:07:04                                                                   1042550495 16-DEC-2011 04:08:24