- RQ1: To what extent are the different library versions actively used?
- RQ2: How are the actively used versions distributed along the history of a library?
- RQ3: Among the actively used versions of a library, is there one or several versions that are significantly more popular than the others?
- RQ4: Does the number of actively used versions relate to the popularity of a library?
- RQ5: How timely are the different library versions in Maven Central?