You can filter entry points so that only certain entry points are displayed in a given desktop. This is accomplished by specifying a Filter ID for objects that have been defined as entry points, and then adding the relevant filter ID values to the desktop. At runtime, the desktop in use only displays the entry points with filter IDs that match the filter IDs specified for the desktop. If you define a filter ID for a folder, all nodes in that folder inherit the filter ID.
In the Filter ID property of a desktop, you list one or more filter ID values. To display in the desktop also content that does not have a filter ID, add the following value to the list: com.sap.portal.emptyFilterID .
The following diagram shows the effect of the different filter ID modes on the roles that are displayed at runtime.