Titlebook: Conceptual Modeling of Information Systems; Antoni Olivé Textbook 2007 Springer-Verlag Berlin Heidelberg 2007 Conceptual Modeling.Domain E

Hypomania

Metamodeling,they are also instances of types known as meta entity types. This is the basis of metamodeling, which we discuss in this chapter. Metamodeling is very important in the field of information systems, particularly in conceptual modeling.

negligence

有效

patriarch

乞讨

Interventions, Policy, and AdvocacyIn the preceding chapters of this book, we studied the structural part of a conceptual schema, that is, the structural schema. In this chapter, we start the study of the behavioral part, called the behavioral schema.

VEST

penance

Gary W. Evans,Stephen J. LeporeIn this chapter, we study statecharts. Statecharts are an extension of the state transition diagrams that we studied in the previous chapter. Statecharts can be defined in UML. The main extensions provided by statecharts are state hierarchies and parallelism. These are presented in Sects. 14.1 and 14.2, respectively.

从属

脆弱么

Entity Types,Determining the entity types that exist in a given domain and are relevant to an information system is a fundamental task in conceptual modeling. A clear understanding of entity types and their characteristics is therefore necessary. This is the focus of this chapter.

COLIC

Cardinality Constraints,Cardinality constraints are one of the most important kinds of constraint in conceptual modeling. In addition to constraining the population of relationship types, cardinality constraints help us to understand the meaning of the types involved, and they also play an important role in system design