Henderik Alex (Erik) Proper (born 22 May 1967) is a Dutch computer scientist, an FNR PEARL Laureate, and a senior research manager within the Computer Science (ITIS) department of the Luxembourg Institute of Science and Technology (LIST).
[3] Born in Rheden, Proper studied computer science at the Radboud University Nijmegen.
In 1990 he received his MSc, and in 1994 his PhD with distinction with a thesis entitled "A Theory for Conceptual Modelling of Evolving Application Domains" under supervision of Eckhard D.
Back in The Netherlands in 1997 Proper started working in the software industry as consultant at Atos Origin in Amsterdam, and later for Ordina in Gouda.
Since June 2017, he also holds an adjunct professorship in data and knowledge engineering at the University of Luxembourg.
He is also the Stellvertretender Sprecher (vice chair) of the EMISA working group of the German Computer Science Society (Gesellschaft für Informatik).
These extensions are basically abstract mechanisms, that "allow users to control the amount of detail seen at any given time.
Halpin (2006) summarized that that research ranged from "reverse engineering, support for complex objects, process-event modeling, external schema generation... schema optimization, meta-modeling, subtype extensions, null handling, object-oriented mapping, unary nesting, [to] empirical research.