every element which has associations to other elements, will carry an <Associations> tag containing a number of elements
 referring the ID/LocalID of the associated entity

Open Issue 1: is there any problem if we use LocalID in associations? so far, it seems no;

sol.1 state that the scope of the association referring a LocalID is local to the main entity; (to be better clarified)

sol.2 use always Global ID; in case of LocalID, some prefix which make it global should be used (e.g. ComputingServiceID
:ComputingShareLocalID)