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