Understanding Report Objects
Typically, you include multiple sections in a report template; you usually include a page header and one detail section. In each report section, you can include multiple report objects. These objects are either business view fields or other data fields.
Some report objects are available only in specific section types. For example, you typically use runtime fields in page header sections; runtime fields are not available in columnar and tabular sections. Business view fields are used in detail sections only. You cannot attach a business view to a page header. In contrast, you can place data dictionary fields in any section type.