@CONFERENCE\{IMM2002-01453, author = "D. Bj{\o}rner", title = "What is an Infrastructure ? Towards an Informatics Answer", year = "2002", month = "mar", booktitle = "The {UNU}/{IIST} 10th Anniversary Symposium, Lisboa, Portugal", volume = "", series = "", editor = "Armando Haeberer, Carlo Ghezzi and Tom Maibaum", publisher = "Springer-Verlag", organization = "", address = "Heidelberg, Germany", url = "http://www2.compute.dtu.dk/pubdb/pubs/1453-full.html", abstract = "Infrastructure components - such as transportation, health care, public administration, financial services, logistics - constitute large, man-made systems. Very large software systems have been and are being commissioned and requirements put forward without, we claim, the necessary documentation of the underlying domain being present. In this paper we examine what it takes to do so: To create theoris of application domains." }