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RE: implementing XPath over a DB like DB2
- From: "Michael Kay" <michael dot h dot kay at ntlworld dot com>
- To: <xsl-list at lists dot mulberrytech dot com>
- Date: Wed, 13 Mar 2002 18:17:12 -0000
- Subject: RE: [xsl] implementing XPath over a DB like DB2
- Reply-to: xsl-list at lists dot mulberrytech dot com
Software AG's XML database, Tamino, has a query language which is
essentially an extended XPath; the implementation can take advantages of
indexes to optimize the query and search gigabytes of persistent data. The
new XQuery specification is a superset of XPath so the same technology is
needed.
The model is not that the database is one huge XML document, rather it is a
collection of documents, and one of the extensions to XPath semantics is the
extension to apply a single XPath expression to such a collection.
We have an XSLT processor inside Tamino that's designed to achieve close
integration with the database, though as yet it is not operating directly on
the persistent data: it operates on documents that you create as the result
of a query.
Michael Kay
Software AG
home: Michael.H.Kay@ntlworld.com
work: Michael.Kay@softwareag.com
> -----Original Message-----
> From: owner-xsl-list@lists.mulberrytech.com
> [mailto:owner-xsl-list@lists.mulberrytech.com]On Behalf Of Russell
> Balest
> Sent: 13 March 2002 16:20
> To: xsl-list@lists.mulberrytech.com
> Subject: [xsl] implementing XPath over a DB like DB2
>
>
>
>
> In the Xalan-J 2.0 design documentation, there is a section called
> XPath Database Connection ( you should check it out, it has a
> very nice
> picture). They describe implementing the NodeIterator
> interface on top of a
> database like DB2. ( see
> http://xml.apache.org/xalan-j/design/design2_0_0.html#xpathdbconn )
> My conception of this is an XML _document_ that lives in
> a database
> (because it's many Gbytes), but you can
> still apply XSLT to it, transparently.
> Has anyone done this or know of examples.
> Alternatively, is anyone doing
> any XSLT on XML that lives in
> a DB - not a file. How do you do it?
>
> Russell Balest
>
>
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