Javadoc
Flag that indicates incomplete item. If set to true then the
values in this item are not complete. If this flag is true
then it can be assumed that the object that this item represents
has at least one value. This is a method how to indicate that
the item really has some values, but are not here. This may
be used for variety of purposes. It may indicate that the
account has a password, but the password value is not revealed.
This may indicate that a user has a photo, but the photo was not
requested and therefore is not returned. This may be used to indicate
that only part of the attribute values were returned from the search.
And so on.