I have received the two ERR files and one NL- files from Claudius
Korzen. I have uploaded them at
http://www.filedropper.com/pdfboxerror1
http://www.filedropper.com/pdfboxerror2
http://www.filedropper.com/examplenlminus
About the ERR files: these are indeed bad. The content streams are bad,
probably a bug in the creator software.
About the NL- file: he wrote that per their test design decision, the
two formulas in "Lemma 3.3" on page 13 should be different paragraphs
because they have different semantic roles than the body text.
I'm neutral about this... IMHO extracting formulas form a PDF is useless
because one will never get an exact copy due to the two-dimensionality
(subscript and superscript) of them.
Tilman
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