NuInt: Neutrino Interactions in the Intermediate energy range

The discovery of the neutrino non-standard properties (mass and mixing) refocused on various aspects of the neutrino standard properties, both from the theoretical and the experimental side. This concerns in particular ν interactions in the intermediate energy range (0.5 - 5 GeV), the main topic of the series of NuInt Workshops. In this introduction to NuInt04 we offer a summary of the achievements from the previous workshops and draw the general context of the discussion.