Action Type
Actions can be of the following types:
Drill through actions which return the set of rows that represents the underlying data of the selected cells of the cube where the action occurs. When this option is chosen an additional tab is enabled that allows drill through columns to be chosen.
Reporting actions which return a report from Reporting Services that is associated with the selected section of the cube where the action occurs.
Standard actions (Action), which return the action element (URL, HTML, DataSet, RowSet, and other elements) that is associated with the selected section of the cube where the action occurs.
The action type chosen determines which action specific fields are enabled within the dialog.