Base object manager which fire propertyChangeEvent when objectInBeamer__
is deleted (not when it changes; these changes are listened
by the property editors)
if true, the instance has the LINKED_FOR_ONE_TO_ONE type,
with only one internal or external EligibleParty as source,
and only one internal or external target.
Invoked by openView(), ActionNewView, ActionOpenMainFrame, Desktop, ActionCopy
to create a GraphicEPRView or a GraphicNoThanView for a EPRViewInBase or a NoThanViewInBase,
to display their resources in the explorer, and to display the view in a frame or
in one of the two 'all views' frames.
pseudo-structural link type 'owner', associated to an owning relation between
an UserID and a Resource. '[]' is used for structural and pseudo
structural links when there are rights.