About queston (sqlscript):
If someboby ask forum "how i can include single special symbol in my select?"
It's OK, He/she usually get aswer very quickly, without problems.
This question not so simple as previous example!

Mr. Pravin, did u try to write script for reingeneering trigger's code,
all types of triggers( object triggers, db event triggers, dml event triggers,
trigger on views ...) ?

Structure on dba_triggers is'n simple, like dba_tables.
field TRIGGER_BODY keep only body:
declare
..
begin
..
end;
and u must recreate trigger header from another field, and type of this process
depend from type of trigger.
because u can't use field DESCRIPTION directly, u must check type of
trigger and type of base trigger object and rebuild field DESCRIPTION in script.
and so on....

About documentation:
In documentation u can't find no one word about values of each field in
dba_triggers table, but u can't write good script without values of fields
in this particulate situation.
U have to research this topic youself from real database.

I'm sorry about this my post .

NOTE: THIS IS RIGHT DECISION OF MODERATORS TO CLOCE THAT (kavithared) POST.
I ASK TO CLOCE MY POST TOO.