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- Subject: RE: [xml-dev] XML-enabled databases, XQuery APIs
- From: "scott wiseman" <firstname.lastname@example.org>
- Date: Thu, 14 Apr 2005 21:05:00 -0700
- Thread-index: AcVBVEY/Ol6//2lBT6mqYbt1sETKeAAIHKCA
- Thread-topic: [xml-dev] XML-enabled databases, XQuery APIs
From: David Lyon [mailto:email@example.com]
Sent: Friday, April 15, 2005 5:45 AM
Subject: Re: [xml-dev] XML-enabled databases, XQuery APIs
On Thu, 14 Apr 2005 4:50 pm, Ken North wrote:
> in an article by Edd Dumbill. Edd quoted Ron Bourret as mentioning
> "Oracle 9i release 2 was the first out with "native"
> XML support, but their "native" XML support means storing the XML in a
> CLOB column [snip]".
I am a big fan of doing that..
> That requires clarification because there are some persistent
> misconceptions about XML and databases.
> From the time people first started talking about "native XML
> databases", there's been a myth that SQL databases cannot store and
> index XML documents in their native format.
For business XML data exchange, I think that it is the perfect
And for mass interoperability, I would advocate an ultra-simple SQL
database structure (like the one I posted about a month ago on xml-dev)
that can be setup to send/receive xml documents. It should be able to
exist on all database vendors databases (ie be non-exclusive) and be
based on two accounting tables; traders(companies) and trader_documents.
The problem with file based XML systems is that it is awful to manage.
Databases are so much cleaner to maintain. If the documents are filed
nicely inside memo/xml fields, well I think how easy is that.
Just need to have some nice open source communications software to do
the (what can be surprisingly) quite tricky job of transferring the xml
> Developers wanted more, of course, such as being able to describe
> document structure and shred documents (map document content to
> columns). That's also been available for years with SQL platforms such
> as Microsoft SQL Server, Oracle, Sybase and DB2 (XML Extender).
Even now I think are happy to have more. Anything that they can show to
the Boss and get approval for spending (wasting) time looking into :-)
Open source is great for that.. I've come to discover..
> Even more desirable is implementing XML as an SQL type. This provides
> efficiencies for the SQL engine and query optimizer. Informix was the
> first to demonstrate that at XML conferences in 1999. Those demos
> showed the XML type gave significantly better performance than XML
> stored in a CLOB column. (IBM acquired Informix in 2001).
That's interesting, true.
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