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 <8D9FDD7FE28BD41183310060082D47188325B7@nnexch-01.nfer-nelson.co.uk>
From: Robert Stuart <Robert.Stuart@NFER-NELSON.co.uk>
To: "'general@xml.apache.org'" <general@xml.apache.org>
Subject: RE: [vote] A native XML database project under Apache
Date: Fri, 19 Oct 2001 08:45:00 +0100
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Any XML document, by definition, must be represented by a tree =
structure.
This means that, for all valid XML documents have a clearly defined
structure.

Tree structures map, very naturally, into relational databases (pun not
intended).=20
For the rest of this note, any reference I make to a database (db), =
assume I
mean a relational database.

XML documents may (optional) have meta-data associated with them (DTD, =
or
XSD).  This meta-data would simplify the design of a db, giving the
relationship between tables - allowing us to populate the db structure =
as a
document is received.  (Note: this is a bi-directional operation, the
meta-data in the db may be used to generate a DTD/XSD).

The meta-data would not be essential in db design.


I think I'd like to come on board with this one, how do I become a
committer?


Cheers

Robert Stuart


-----Original Message-----
From: Eric van der Vlist [mailto:vdv@dyomedea.com]
Sent: 19 October 2001 08:17
To: general@xml.apache.org
Subject: Re: [vote] A native XML database project under Apache


Hi Stefano,

Stefano Mazzocchi wrote:

> Hi,
>=20
> while the world of native XML databases is full of marketing hype and
> promises, it is evident (for all those who tried) that mapping =
general
> XML schemas to relational databases can be sometimes very painful and
> not very efficient.
>=20
> In fact, it is widely recognized from the database research community
> that while well structured can be easily and efficiently mapped to a
> relational database, less structured (often called semi-structured) =
data
> is much more difficult to map.
>=20


Just for fun and also to take a step backward and evaluate the changes=20
and invariants in our perception of XML systems, I couldn't resist=20
reading some old emails exchanged two years ago!

http://groups.yahoo.com/group/xml-server/message/32

Enjoy :)

Eric
--=20
Rendez-vous =E0 Paris pour le Forum XML.
                    =
http://www.technoforum.fr/Pages/forumXML01/index.html
------------------------------------------------------------------------=

Eric van der Vlist       http://xmlfr.org            =
http://dyomedea.com
http://xsltunit.org      http://4xt.org           =
http://examplotron.org
------------------------------------------------------------------------=


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