[xml] xmlValidateDocument and very large files

[Thomas Porschberg <thomas porschberg osp-dd de>]

How critical is it to validate very large files, e.g.
XML-Output from a database (200 MB size), with
xmlValidateDocument ?

Is there really the whole document in memory ?

I want process the XML with the SAX - Interface, but
the first step should be a validation. 
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