The second series of tests consisted of using all the documents of the subcorpus “specialist” $E$, because the documents of the subcorpus of Annodis are not identical.  As far as system evaluations are concerned, we use the 78 $E$ documents as reference.  We calculate the precision $P$, the recall $R$ and the $F$-score on the text corpus used in our tests, as follow: 
 Question: How is segmentation quality evaluated?
Segmentation quality is evaluated by calculating the precision, recall, and F-score of the automatic segmentations in comparison to the segmentations made by expert annotators from the ANNODIS subcorpus.