Distribution of our 86 classes in the (BPT) diagram. The distribution of all galaxies with indices present in the DR7 release (not all the 302 248 objects used for the classification) is shown in grey. The red contours show the distribution of the objects within each class. The curves are taken from Kewley et al. (2001), Kauffmann et al. (2003), Stasińska et al. (2006) (right to left respectively). The bottom left zone represents star-forming regions, the upper zone represents AGNs and Seyfert galaxies, and the bottom right zone represents LINERs.