> FO is PDF documents in raw form. 

I don't agree!

XSL-FO is "an XML vocabulary for specifying formatting
semantics." (quoted from spec). i.e. using XSL-FO we
can specify formatting of documents.. You may imagine
it as an enhanced form of CSS. CSS is targeted to web
presentation.. But XSL-FO can be rendered(after
conversion or if the medium natively supports it) to
other mediums also (like PDF, text etc).

Regards,
Mukul



		
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