Re: [SQLObject] thoughts on structure and components

[Nick <ni...@dd...>]

On Thu, 2003-05-08 at 04:37, Bud P.Bruegger wrote:
> Backend:
>   An object that manages the interaction with the actual database.
>   It has the following components:
>   - mapping
>   - dbDriver
>   - dbConnection

Don't forget cache somewhere, which probably makes more sense to put
here than in the Connection.

> Mapping:
>   Description of the physical representation in a dbms-independent way.  

Isn't mapping dependent on the way the data is stored in the database? 
Maybe I'm misunderstanding what you mean by mapping.

> Attribute:
>   A high-level physical type to represent the higher-level physical rep.  This
>   includes marshalling to and from a lower-level representation.  Marshalling
>   can do things such as encoding structured objects (phone number with country
>   and area code) to strings, pickling, mapping a single attribute (a point) to
>   multiple columns (x, y or lat,long), etc.  

How does this relate to mapping?  It sounds similar.

Nick