IBM® Cognos® Dynamic Cubes inserts
padding members to balance unbalanced and ragged hierarchies. Padding
members do not represent actual dimension members; they are visible
only for navigational and performance reasons.
You can reference a padding member in an expression in the same
way as any other hierarchy member.
Padding members can include a blank caption or the same caption
as the parent. The following diagram illustrates a ragged hierarchy
with a padding member included in the Europe branch. A blank caption
was used as the caption for the padding member.
In the IBM Cognos studios, the metadata for this hierarchy
with blank captions would show a level without a caption, as in the
The metadata for the same hierarchy using parent captions would
show a level that uses the same caption as the parent, as in the following
A dimensional member can have only one child padding member.
The use of padding members can result in skewed calculations related
to the members of a hierarchy level. For information about removing
skewed data from reports, see Removal of padding members from reports.