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XML Filtering using XPath

Eurig Jones
Ranch Hand

Joined: Feb 05, 2008
Posts: 57
Hi,

I have a problem to solve. I need to filter very large XML documents using XPath. I need to provide a list of xpaths to generate a smaller versions of the documents. for example...

Input:XPathOutput:What is a good way to do this using Java APIs?

Thanks!
Eurig
William Brogden
Author and all-around good cowpoke
Rancher

Joined: Mar 22, 2000
Posts: 12803
    
    5
If your input XML document is truly "very large" - too large to get in memory as a DOM - the standard library XPath will not help you because it requires a DOM to work with.

For documents too big for DOM, you are stuck with some form of SAX or StAX parsing.

I found Harold's chapter on SAX filters to be very helpful when thinking about big SAX problems.

You might find the servingXML toolkit to be helpful.

Bill
Shane Lee
Ranch Hand

Joined: Mar 19, 2005
Posts: 63
How large an xml file william are we talking before looking into streaming xml instead of parsing as a DOM and using xpath and xquery to query the data?
 
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