1           equ       value_bead.header.type,0      offset in value bead of type field
2           equ       value_bead.reference_count,1  offset of ref count
3           equ       value_bead.total_data_elements,2        offset in vb of data elements
4           equ       value_bead.rhorho,3           offset in vb of rhorho
5           equ       value_bead.data_pointer,4     packed pointer to data array
6           equ       value_bead.rho,5              start of rho vector (if there is one)