Evaluating User Behavior on Data Collections in a Digital Library

We evaluate the usage of a Digital Library with many different collections, by examining its log files, and we concluded that the access points that the users mostly refer to, depend heavily on the type of content of the collection. We also found that most users not only tend to use simple query structures (e.g. one search term) and very few operations per session but they also reduce the complexity of their sessions, as they get more experienced.