A data representation is a means of accessing data. Currently two general data representations are implemented DataInMemory and DataOnDisk.
DataInMemory data is loaded into memory on initialisation, resulting in faster processing of data at the cost of RAM.
DataOnDisk only the metadata is loaded into memory, with data being accessed from the disk only when needed. This is slower than DataInMemory but allows processing of datasets much larger than the available RAM.
To create a data representation for a currently unsupported style of data access, the DataRepresentation class should be extended and the new class added into the same folder.