Atkinson, MP, Morrison, R . 19th International Conference on Systems Sciences, Hawaii, pp 842-854 Vol. Persistence should permit data of any type or size to exist for arbitrary lengths of time. Our graphics proposals include bit map and vector models of pictures and control of colour maps.
Name spaces provide the mechanism for binding control.
It is the interplay and introduction of these language constructs that greatly extends the repertoire of programming activities supported by the programming language. A prototype language which includes these concepts has been implemented and used extensively.