> If you know, where everything you want to highlight is, it is not too
> much work. It is a lot work to extract this information.

What do you mean by "where everything is"? Is it enough to know the "word" or 
do I have to know the exact coordinates and height and with of every word I 
want to highlight?
Did you use PDFBox to extract the text or another (open source) tool?

> We are working on that with several people for months ;-).

Not very encouraging...
 
> Perhaps you get an idea of the problems from a poster we had on a
> workshop:
> 
> http://dx.doi.org/10.1038/npre.2009.3141.1

Thanks for the link. Seems that you really invested a lot of time in this 
topic. 

Best Regards,
Widuk

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