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From Upayavira ...@odoko.co.uk>
Subject Re: multiple xpaths
Date Mon, 03 Oct 2005 23:43:24 GMT
David wrote:
> Sylvain Wallez wrote:
> 
>> David wrote:
>>
>>> I am writing a cocoon transformer and need to know when any of 
>>> multiple xpaths match. I'm sure there must be a be a more efficient 
>>> way then converting it to a DOM document and then running each xpath 
>>> to get the nodelist of each.
>>>
>>> What is the best way to do this?
>>
>>
>>
>>
>> The problem with XPath is that it's intrinsically tied to the DOM 
>> hierarchical model. So you need to have a DOM ready to query the 
>> document with XPath.
>>
>> You may want to have a look at STX [1], which uses a subset of XPath 
>> that is suited to streamed processing.
>>
>> Sylvain
>>
>> [1] http://stx.sourceforge.net/
>>
> 
> I was looking at STX too but couldn't find a way to use it from Java. 
> Anyone know how you use it without making an stx file?
> 
> I understand the issue with xpaths and needing DOM. I know xalan has its 
> Document Table Model (DTM) that improves on performance. Anyone know if 
> we can tap into that without writting a XSL file?

For an example of using STX in java, see the STX block, that allows you 
to use STX as a normal Cocoon transformer.

Regards, Upayavira

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