Re: The IDS, the EDS and the DBMS
Date: Tue, 7 Sep 2004 03:04:28 -0400
Message-ID: <juudnSo_xYY8wKDcRVn-og_at_comcast.com>
"Lauri Pietarinen" <lauri.pietarinen_at_atbusiness.com> wrote in message
news:e9d83568.0409062058.43a8e914_at_posting.google.com...
> BTW, can anybody point me to a historical review of the
> ANSI-SPARC Architecture?
>
> ==================================================
>
> ANSI-SPARC Three-level Architecture
>
> External Level
> Users' view of the database.
> Describes that part of database that is relevant to a particular
> user.
> Conceptual Level
> Community view of the database.
> Describes what data is stored in database and relationships
> among the data.
> Internal Level
> Physical representation of the database on the computer.
> Describes how the data is stored in the database.
>
> ===================================================
My old geezer's memory may be playing trick on me, but this reminds me of Martin! Received on Tue Sep 07 2004 - 09:04:28 CEST