Content deleted Content added
Line 15:
[[G.M. Nijssen]] made fundamental contributions by introducing the "circle-box" notation for object types and roles, and by formulating the first version of the conceptual schema design procedure. Robert Meersman extended the approach by adding subtyping, and introducing the first truly conceptual query language.
Object role modeling also evolved from the ''Natural language Information Analysis Method'', a methodology that was initially developed by the academic researcher, [[G.M. Nijssen]] in the Netherlands ([[Europe]]) in the mid-1970s and his research team at the Control Data Corporation Research Laboratory in Belgium, and later at the University of Queensland, Australia in the 1980s. The acronym '''NIAM''' originally stood for "Nijssen's Information Analysis Methodology", and later generalised to "Natural language Information Analysis Methodology" and ''Binary Relationship Modeling'' since G. M. Nijssen was only one of many people involved in the development of the method.<ref>{{cite book |last=Wintraecken |first=J. J. V. R. |date=1990 |origyear=1987 |title=The NIAM information analysis method: theory and practice |series=Translation of: Informatie-analyse volgens NIAM |___location=Dordrecht; Boston |publisher=[[Kluwer Academic Publishers]] |isbn=079230263X |oclc=19554537 |doi=10.1007/978-94-009-0451-4 |url=https://books.google.com/books?id=iJaqCAAAQBAJ |ref=harv}}</ref>
In 1989 [[Terry Halpin]] completed his PhD thesis on ORM, providing the first full formalization of the approach and incorporating several extensions.
| |||