[xsl] Joining Multiple XML using XPath API of XALAN

[Joseph Kesselman <keshlam at us dot ibm dot com>]

>What are your particular requirements?  Using XSLT for this sort of thing 
is >really a pretty good idea... 

That would be my own recommendation; write an XSLT stylesheet which uses 
the document() function to access the documents to be merged (perhaps 
getting the URIs from a top-level document, if they might change) and 
appropriately recombines the data from those. 

If you're only using the XPath API, you'll have to hand-code the second 
half of that problem. In my experience, the inefficiencies are actually in 
the repeated XPath lookups (and in the possibility that the XPath might 
reference ancestor/preceeding nodes) more than in the generation side of 
things, so I _think_ you'll find that coding your own generator isn't as 
much faster as you might expect.

But it'd certainly be interesting to try both approaches and compare the 
results...

______________________________________
Joe Kesselman  / IBM Research

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