year | nb of papers from the metadata | nb of papers in PDF | nb of papers in XML (= output of PDFBox) | nb of non empty papers as extraction result | nb of papers with an abstract (from extraction) | nb of papers with references (from extraction) | nb of unknown words | nb of known words | nb of words of the content | evaluation of noise = pourcentage of nb of known words / nb of words of the content | evaluation of silence = pourcentage of non empty papers as extraction result / PDF docs | combined evaluation of noise and silence | nb of English papers | nb of French papers | nb of papers in another language (es+de+ru) |