with evry descriptor inverted list is associated which 
tells about all the values of the descriptor with their 
counts and the ISNs of the records.

Address convertor is associated with an adabas file whic 
tells the block number of an ISN

Datastorage has all the blocks which contains the record.

ADABASE the adaptable database, is a high-performance, 
multithreaded, database management system for mainframe 
platforms where database performance is a critical factor.
It is built on INVERTED LIST model.

Inverted List: it is used to resolve Adabas search commands 
and read records in logical sequence, is built and 
maintained for each field in an Adabas file that is 
designated as a key field or “descriptor”.t is called 
an “inverted” list because it is organized by descriptor 
value rather than by ISN.

ADDRESS CONVERTOR:it contains the RABN's in ISN order. It 
determines the physical location of a record. It is an 
index that maps the logical identifier of a record (that 
is, the ISN) to the relative Adabas block number (RABN) of
the Data Storage block where the record is stored.

DATA  Storage:It stores the actual record in the order in 
which it was entered