Re: Hierarchical data models
From: rpost <rpost_at_pcwin518.campus.tue.nl>
Date: Sat, 15 Aug 2009 16:46:39 +0000 (UTC)
Message-ID: <h66opf$2svb$4_at_mud.stack.nl>
Date: Sat, 15 Aug 2009 16:46:39 +0000 (UTC)
Message-ID: <h66opf$2svb$4_at_mud.stack.nl>
Nilone wrote:
>I'm looking for any references, discussion or theory about
Do you mean something like this?
>hierarchical models for situations such as residential addresses,
>geopolitical subdivisions, corporate structures, military ranks, file
>systems, type systems, etc.
ftp://ftp.software.ibm.com/software/data/u2/pubs/whitepapers/nested_rdbms.pdf
>I'm specifically interested in models that can recognize partial
>correlations between subtrees, e.g. most/all countries have cities,
[...]
What does that mean? Should the data model itself express such quantitative correlations, or only the query language?
-- ReinierReceived on Sat Aug 15 2009 - 18:46:39 CEST