Data item filters are
used to restrict the data that is returned from a query to a data
source. The data item filters that you create in the designer are
applied to every report object in the report that uses the data source
containing the data item. Data item filters are not displayed on the
Filters tab.
They are identified by a special icon in the data source’s
data items list.
Note: Date data items and calculated
data items do not have special icons when a data item filter is applied.
You can use either continuous
values or discrete values to create a data item filter. Continuous
value filters can be used only for measures. Discrete value filters
can be used for any character; numeric; or date, datetime, or data
item, as long as the total number of distinct values does not exceed
a maximum number.