A method of providing {HEAD ~ access} to {TAIL ~ a dataset} in a type safe manner includes storing a dataset including a plurality of data elements and a corresponding plurality of order keys for indicating an ordering of the data elements 
to
A method of providing { HEAD ~ access } to { TAIL ~ a dataset } in a type safe manner includes storing a dataset including a plurality of data elements and a corresponding plurality of order keys for indicating an ordering of the data elements
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH