Model Driven Development (MDD) approach is often used to model application
data and behavior by a Platform Independent Model (PIM) and to generate
Platform Specific Models (PSMs) and even the source code by model
transformations. However, these transformations usually omit constraints of
the binary association multiplicities, especially the source class
optionality constraint. This paper is an extended version of the paper
?Transformation of Special Multiplicity Constraints - Comparison of Possible
Realizations? presented at MDASD workshop at the FedCSIS 2012 conference. In
this paper, we summarize the process of the transformation of a binary
association from a PIM into a PSM for relational databases. We suggest
several possible realizations of the source class optionality constraint to
encourage the automatically transformation and discuss their advantages and
disadvantages.We also provide experimental comparison of our suggested
realizations to the common realization where this constraint is omitted.
Abstract-OntoUML is an ontologically well-founded conceptual modelling language that distinguishes various types of classifiers and relations providing precise meaning to the modelled entities. Efforts arise to incorporate OntoUML into the Model-Driven Development approach as a conceptual modelling language for the PIM of application data. In a prequel paper, we have introduced and outlined our approach for a transformation of OntoUML PIM into a PSM of a relational database. In this paper, we discuss the details of various variants of the transformation of Rigid Sortal types of OntoUML.
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