Question on ISN

Hello,

I am learning Natural and Adabas through manuals… There is something i do not understand from the manuals,and i am trying to find the answer in Vain. Its regd how a data is stored in Adabas.

I took the below table from Adabas documentation. If you notice the ISN 10, ISN 11 and ISN 12, it resides on same block number, but it contains different data. I was under the impression that ISN would be unique for the data record until it is reassigned or when data gets deleted. Would you be able to examine the below table – blk size 237, and let me know how same ISN would be used by ADABAS for storing different datarecord. And possibly what would address convertor contain in such case?


Blk ISN  PER-ID  FIRST-NM  LST-NAME  DEPT  BIRTH  

234	1	11400316	WILLI 	BEUSE 	MARK29 	390509
234	2	11400314	ERHARD 	BECKER 	SALE47 	540707
234	13	11300307	JAN 	KAMAL 	SALE37 	590328
235	4	11400312	INGRID 	SCHMID 	MARK19 	540308
235	5	11400310	MARGAR	GROTH 	MARK29 	540623
235	6	11400307	JOSEFA 	LEYRER COMP28 	410407
236	7	11400304	MARIAN 	RACKMAN COMP28 	541209
236	9	11300319	SULEYM 	YALCIN 	SALE37 	580819
237	10	11300316	GABRIEL KANTE 	SALE47 	540809
237 11	11300315	GUDRUN 	FRIESE 	SALE37 	560504
237 12	11300314	GITTA 	MOHRD SALE17 	390912
298	8	11400303	MARTIN 	WALLIN  COMP28 	460921

Sorry guys, looks like i realised my mistake. table given in documentation was incorrect, and table shown above is correct, and ISN number should be unique. Thanks a lot for your understanding. No action required at this point.