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