Computer system, a database for storing electronic data and a method to operate a database system for converting and displaying archived data

1 . A computer system comprising:

a database containing a plurality of data documents stored thereon, each data document containing at least one data field; and

an archive system for electronically archiving data documents originating from said database,

wherein said database comprises a conversion control table containing conversion rule information pertaining to the at least one data field of a data document archived in said archive system wherein content of data fields contained in said retrieved archive data document is replaced by a new content by means of said conversion control table.

2 . The computer system according to claim 1 , further comprising a client interconnected with said database and set up to retrieve any of said data documents from said archive system for display of said retrieved archive data document.

3 . The computer system according to claim 2 , wherein said content is replaced upon display of the retrieved archive data document.

4 . A computer-readable medium having stored thereon a database for storing electronic data, comprising:

a plurality of data documents stored thereon, each data document containing at least one data field, said database being arranged to be interconnected with an archive system for electronically archiving data documents originating from said database; and

a conversion control table containing conversion rule information pertaining to the at least one data field of a data document archived in said archive system wherein content of data fields contained in said retrieved archive data document ( 26 . 1 ) is replaced by a new content by means of said conversion control table.

5 . The computer-readable medium database according to claim 4 , said database being arranged to be interconnected with a client, said client being set up to retrieve any desired of said data documents from said archive system through said database for display of said retrieved archive data document.

6 . The computer-readable medium database according to claim 4 , wherein said content is replaced upon display of the retrieved archive data document.

7 . A method to operate a database system, said database system comprising a database containing a plurality of data documents stored thereon, each data document containing at least one data field, and an archive system for electronically archiving data documents originating from said database, the method comprising:

upon retrieving and opening a data document archived in said archive system, retrieving from said database conversion rule information pertaining to said retrieved archived data document; and

displaying the conversion rule information together with said retrieved archived data document.

8 . The method according to claim 7 , wherein said conversion rule information displayed together with said retrieved archived data document is stored in a conversion control table.

9 . The method according to claim 7 , wherein said conversion control table is a conversion control table.

10 . The method according to claim 7 , wherein said conversion rule information replaces content of data fields contained in said retrieved archived data document.

11 . The method according to claim 7 , wherein said conversion rule information replaces content of data fields contained in said retrieved archived data document upon display of said retrieved archived data document.

12 . The method according to claim 7 , wherein said conversion rule information comprises former content of defined data fields and their relating new content.

13 . The method according to claim 12 , wherein content of data fields contained in said retrieved archived data document is replaced with new content upon display if such new content is identified in said conversion rule information.