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[list4xt] FW: ANNOUNCE: XML Query Engine

Subject: [list4xt] FW: ANNOUNCE: XML Query Engine
From: Dave Pawson (dave.pawson@virgin.net)
Date: 10/06/2000 - 07:57


Of use in xt?
Regards, DaveP

I'm pleased to announce the general availability of XML Query Engine. A
prerelease version of the engine is available for free download and
evaluation at http://www.fatdog.com.

XML Query Engine is a JavaBean component that lets you search your XML
documents for element and attribute content using a full-text-enabled
version of XQL. The engine uses a SAX parser of your choice to build a
traditional inverted index of your documents' full-text content. You
need to do a bit of straightforward Java programming to wire the engine
to your front-end code.

XML Query Engine uses a standard Java result-listener architecture to
deliver its results in one of several flavours of XML or CSV. Result-set
nodes can optionally bear additional "navigational metadata" describing
the nodes in terms of their location within the original documents. You
can use this metadata to re-navigate back into the original files using
either SAX or DOM for further post-processing if desired. Several sample
applications included in the distribution and on the website show how to
do this.

The current version is still pre-beta. It's primarily intended for use
as a personal productivity tool and on servers with low to medium-volume
traffic. There are memory-dependent limitations on maximum index size.
The engine is very fast: indexing speed on my 466 box is up to 75,000
words per second. Full technical documentation is available on the
website, which has been extensively revamped. Size of the XQEngine.jar
file, together with the antlr.jar parser generator used to parse the
XQL, is about 100K.

Best,

Howard Katz
www.fatdog.com

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