[Ted Stresen-Reuter]
> 
> I was reading a book on using PHP with XML and the author notes that 
> PHP's "internal" XML processor (SAX) processes documents node by node 
> (rather than reading the whole document into memory first). 
> You may be 
> able to find an XSLT processor that works the same way 
> (although I kind 
> of doubt it) 

There was at least one that tried to process the document as a stream
(xmlGrep, evolved into Napa).  It went away and its successor went into
a commercial product (XML Origin), although I do not know if it is still
quasi-streaming.  Of course, it may not be possible to avoid storing the
entire document, depending on how the stylesheet works.


Here is a paper on streaming XPATH evaluation:

Streaming XPath Processing with Forward and Backward Axes
Charles Barton et. Al.

http://www.cs.nyu.edu/~deepak/publications/icde.pdf

Cheers,

Tom P

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