Re: deductive databases

From: VC <boston103_at_hotmail.com>
Date: Tue, 17 May 2005 06:25:31 -0400
Message-ID: <p56dnTmpwdoJWxTfRVn-sQ@comcast.com>

"Simon Taylor" <stayl_at_cs.mu.oz.au> wrote in message news:428982b5$1_at_news.unimelb.edu.au...
> Nesting is not significant; it's allowing data structures to express
> choice that increases the expressive power.

Could you please elaborate on this one ?

>Without that, database
> developers have to resort to kludges like NULL or excessively complex
> relational decompositions to deal with missing or optional data.

And on this one too ? With an example if possible ...
>
> Simon Taylor.

Thanks. Received on Tue May 17 2005 - 05:25:31 CDT