Simple question - trailing "." in zone file

[David Carvalho]

Hi!
Sorry for this "beginner" question. If I knew this before, than I completely
forgot.
I know a "." Inside a zone file can be used to define top level entry .If a
record entry  doesn't have it, it gets itself along  with the domain name.
 
Today I was comparing my master and slave, which provide the same responses,
but I noticed a difference.
 
Master named.conf
Zone "ip.address.in-addr.arpa.",
Zone "my.domain."
 
Slave named.conf
Zone "ip.address.in-addr.arpa",
Zone "my.domain"
 
Apparently they are working exactly the same way. Both versions 9.16-9..on
Oracle Linux.
 
The official documentation doesn't use the trailing "."
What are the differences, if any?
Thanks!
 
Kind regards
David 
 
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