Subject: RE: [xsl] implementing XPath over a DB like DB2 From: "Michael Kay" <michael.h.kay@xxxxxxxxxxxx> Date: Wed, 13 Mar 2002 18:17:12 -0000 |
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@xxxxxxxxxxxx work: Michael.Kay@xxxxxxxxxxxxxx > -----Original Message----- > From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx > [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx]On Behalf Of Russell > Balest > Sent: 13 March 2002 16:20 > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx > 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 > > > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list > > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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