Missed to mention that I am using xmlui (UI).
I am trying to block the existing search filters and add new custom filters as per my requirements. If I am not wrong, changes to search filters require changes in discover.xml and addition of corresponding lines in messages.xml(tomcat webapps and Dspace install folder webapps).
Since the addition of one filter did reflect on my search filter (I did not use it on sidebar fact, only simple search), so I guess I am on the right track.
Initially few changes were not showing until I cleared tomcat cache under Catalina/work. But after that, addition of other filters are not reflecting.
I have been able to remove the default search filter "Authors","Subject" but cannot remove "Date Issued".
Please suggest.