In this paper, we describe how ORM is extended, and combined with Concurrent Task Trees (CTT) to model the content as well as the functionality of a web system in the web design me...
Many information systems store their objects in a relational database. If the object schema or the relational schema of an application can change often or in an independent way, it...
Abstract. We review the definition of entity types derived by symbolgenerating rules. These types appear frequently in conceptual schemas. However, up to now they have received ver...
Ontology modeling requires modeling languages expressive enough to represent various definition types. A definition type which seems to be of particular significance is that provid...