Browsing Quaestiones Informaticae (QI) by Author "Van Rooyen, H.O."

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Nebulas as Structural Data Models

Van Rooyen, H.O.; Weiermans, D.J. (Computer Society of South Africa (on behalf of SAICSIT), 1983)

Nebula modell_ing is_ a generalised structural modelling technique which applies to any finite set of objects (entities) and n-ary relat1onsh1ps (n ~2). A nebula model can be presented in either diagrammatic or tabular ...
On a Generalisation of Cayley Diagrams

Labuschagne, W.A.; Van Rooyen, H.O. (Computer Society of South Africa (on behalf of SAICSIT), 1984)

A technique for partially representing binary group operations by sets of binary relations was devised by Cayley. This technique can be generalised to permit the representation of arbitrary sets of n-ary relations {n ~ ...

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