Knowledge acquisition on Dante Alighieri's works

The approach followed for the identification and the implementation of visualization diagrams able to support the knowledge acquisition on Dante's works is described. Two high level structures and an implementation model are proposed. An example of citation histogram is given; one of its possible refinements is considered. The article is part of the Towards a Digital Dante Encyclopedia, a three-year Italian National Project which aims to build a digital library endowed with services to support scholars in creating, evolving and consulting an encyclopedia on Dante Alighieri and on his works.