List view (an instance of Rule-Obj-ListView ) is used to define a custom report or personal version of a report.
A list view can be configured as follows:

Applies to class of list view will be taken as the database table map for the search criteria.
Display fields tab is used to depict the fields that are displayed along with category and to enable/disable
sorting
Content tab is used to depict the criteria, fields to be retrieved, key of each row (if selected) and Report
source (Page name where the values should be saved and the activity to be called)
In organize tab we specify to enable/disable paging, page size, mode, alignment etc.
We can also configure additional buttons and their fragments here.
Format tab is used to depict the formatting of the list (like even/odd coloring) and details on single click etc.

List view can be accessed from an activity or html as follows:

A list view can be used for complex retrievals from database by not specifying the display, format and Organize tabl.
PyAction in that case would perform instead of refresh.   _{Your Comment}