DNS zone data

Apart from installing and configuring DNS itself, a crucial preliminary step is to structure and prepare the DNS zone data source files. In what follows, I assume that all the structure and contents have been addressed as defined on the preceding posts (previous links).
  
Take the internal DNS servers NS00 thru NS02 (below DNS internal roots).
Their named.zones included by /etc/named.conf could be as follows:
  
zone "business.corp" {
  type master;
  file "master/db.business.corp";
};
 
zone "10.in-addr.arpa" {
  type master;
  file "master/db.10";
};
 
zone "168.192.in-addr.arpa" {
  type master;
  file "master/db.192.168";
};
   
NOTE

Of course, it's not recommended to have a multi-master setup.
This means, just as example, that only NS00 should be master.
Hence, it suffices to substitute master for slave for NS01 and NS02.

The contents of each of the above zone data file in master is as follows:

I) business.corp

;
;       Business Corp.
;
;       Internal DNS (top-level) server forward zone.
;       last update:  August 5, 2014.
;
 
$TTL 3h 

@  IN  SOA  NS00.business.corp.  hostmaster.business.corp.  ( 
            1    ; Serial 
            3h   ; Refresh after 3 hours 
            1h   ; Retry after 1 hour 
            1w   ; Expire after 1 week 
            1h ) ; Negative caching TTL of 1 hour

; Authoritative name servers.

                    IN  NS  NS00.business.corp. 
                    IN  NS  NS01.business.corp.
                    IN  NS  NS02.business.corp.

; The internal root servers A records.

A                   IN  A  10.0.0.10
B                   IN  A  10.0.0.20
C                   IN  A  10.0.0.30
D                   IN  A  10.0.0.40

; The internal top-level servers A records.

NS00                IN  A  10.0.1.10
NS01                IN  A  10.0.1.20
NS02                IN  A  10.0.1.30

; Other internal hosts A records.

; ...
 
; End of File.

II) 10.in-addr.arpa

;
;       Business Corp.
;
;       Internal DNS (top-level) server reverse zone.
;       last update:  August 5, 2014.
;
 
$TTL 3h 

@  IN  SOA  NS00.business.corp.  hostmaster.business.corp.  ( 
            1    ; Serial 
            3h   ; Refresh after 3 hours 
            1h   ; Retry after 1 hour 
            1w   ; Expire after 1 week 
            1h ) ; Negative caching TTL of 1 hour

; Authoritative name servers.

                    IN  NS  NS00.business.corp. 
                    IN  NS  NS01.business.corp.
                    IN  NS  NS02.business.corp.

; The internal root servers PTR records.

10.0.0              IN  PTR A.business.corp.
20.0.0              IN  PTR B.business.corp.
30.0.0              IN  PTR C.business.corp.
40.0.0              IN  PTR D.business.corp.

; The internal top-level servers PTR records.

10.1.0              IN  PTR NS00.business.corp.
20.1.0              IN  PTR NS01.business.corp.
30.1.0              IN  PTR NS02.business.corp.

; Other internal hosts PTR records.

; ...
 
; End of File.

III) 168.192.in-addr.arpa

;
;       Business Corp.
;
;       Internal DNS (top-level) server reverse zone.
;       last update:  August 5, 2014.
;
 
$TTL 3h 

@  IN  SOA  NS00.business.corp.  hostmaster.business.corp.  ( 
            1    ; Serial 
            3h   ; Refresh after 3 hours 
            1h   ; Retry after 1 hour 
            1w   ; Expire after 1 week 
            1h ) ; Negative caching TTL of 1 hour

; Authoritative name servers.

                    IN  NS  NS00.business.corp. 
                    IN  NS  NS01.business.corp.
                    IN  NS  NS02.business.corp.

; Other internal hosts PTR records.

; ...

; End of File.