The Field List pane displays the structure and contents of the data that is bound to the report (also known as Report Data).
Any of the properties can be added to the Report Layout by drag and drop. The icon displayed against each entry in the Report Data structure indicates the property format\type. All date properties appear in the Report Data twice: once as a string format and once as a date format (to allow better manipulation).
Table
String
Date and Time
Number
Decimal