Changes
/* REFERENCE */
Assign a reference if the value of the property should link to an {{UBIK}} object. The data type of the MetaProperty has to be ''Guid'' that the data (guid) can hold a reference to an {{UBIK}} object.
# Locate an existing or [[Create_a_new_Reference|create a new [[Reference]]
# Assign the reference to the '''REFERENCE''' attribute either by
#* dragging and dropping the reference object onto the cell
