Dynamic attributes are like category attributes, but they can be assigned to a control
attribute that is not the taxonomy. The control attribute for category attributes is the
taxonomy attribute and only the taxonomy attribute, so a repository can only contain one set
of category attributes. Since dynamic attributes are assigned to other attributes, a
repository can have more than one set of dynamic attributes. If the control attribute for a
set of dynamic attributes is a hierarchy attribute, dynamic attribute values can be
inherited.