@CONFERENCE\{IMM2003-01449, author = "D. Bj{\o}rner", title = "An Ontology for a TripTych Formal Software Development", year = "2003", booktitle = "{US} DoD Workshop on {''}Radical Innovations for Software and Systems Engineering''", volume = "", series = "Lecture Notes in Computer Science", editor = "Martin Wirsing", publisher = "Springer-Verlag", organization = "", address = "Heidelberg, Germany", url = "http://www2.compute.dtu.dk/pubdb/pubs/1449-full.html", abstract = "An ontology, ie., a formalised set of strongly interrelated definitions, is given for an approach to software development that spans domain engineering, requirements engineering and software design - and which is otherwise based on a judicious use of both informal and formal, mathematics-based techniques." }