22-MAY-1967 :- BIRTH OF Erik Proper, Dutch computer scientist.

Henderik Alex (Erik) Proper 
(born 22 May 1967) is a Dutch computer scientist, Professor of Information Systems at the Radboud University Nijmegen, and IT consultant, known for work on conceptual modelling of information systems and enterprise engineering.

In his 1994 PhD thesis "A Theory for Conceptual Modelling of Evolving Application Domains," Proper developed a formal specification of information system development. This specification was based Object-role modeling, and was one of the many extensions to its basic framework. These extensions are basically abstract mechanisms, that "allow users to control the amount of detail seen at any given time."

While Proper focussed on schema evolution with Object-role modeling, other researchers in the 1990s had focused on a range of related topics. Halpin (2006) summarized that that research ranged from "reverse engineering, support for complex objects, process-event modeling, external schema generation... schema optimization, meta-modeling, sub type extensions, null handling, object-oriented mapping, unary nesting, [to] empirical research."

In the 2009 "Enterprise Architecture: Creating Value by Informed Governance," \ and Proper traced the notion of architecture in the field of information systems development. They summarized:

When software applications became larger and larger, people such as Shaw and Garlan coined the term software architecture. This notion of architecture deals with the key design principles underlying software artefacts. In the 1980s and 1990s, people became aware that the development of information technology (IT) should be done in conjunction with the development of the context in which it was used. This led to the identification of the so-called business/IT alignment problem. Solving the business/IT alignment problem requires enterprises to align human, organizational, informational, and technological aspects of systems."