Lists
Lists are lists of elements which you use in Ad-hoc reports. You create lists in the Database Structure pane and define them in the List Designer.
When you define a list, you specify which elements of a list are displayed in the report, how they are sorted, what filters (if any) are applied to them and what attributes (if any) are used.
Lists in the Database Structure are global lists. They are valid for the entire report catalog. When you insert a global list in a report, the list is copied into a local list which is valid only for the report. You can edit a global list in the Database Structure, or a local list in a report.
So, if you create a list in a report catalog to which other users have access, changes which you make to the global list will affect all users of the list. And, if you insert a list into a report and then delete the list from the Database Structure, the report is not affected.