The root of a composition must contain the information which points to the compositions for which it is the root. Keep in mind that the root of a composition can be the root of several compositions.
The root of the composition is the object pointed to by COMPOSITION:Root in a binding table version. However, the information in the binding table version is not used to determine the root of the composition, as that information is known to the AIM layer. The resolution only takes place in the other direction, from root of the composition to binding table.
In each root version there has to be a field `COMPOSITION:Compositions', where the members in the linkitem list in the field in the odd places are presentation description objects , while the members in the even places are binding tables . We have actually a list of (presentation description object,binding table)-pairs as seen in figure 8. Thus, given the root of an object, we can then determine the binding table to use.
: Root Version of a Composition