UML PROFILE FOR SAVECCM - Research

UML
referred to with the name of the metaclass instead of using expression "instance of
the metaclass *".
Also, for better legibility, when referring to UML packages Italic style will be
used in further text.
4.3 The UML Infrastructure Architecture
The UML infrastructure is defined by the InfrastructureLibrary, which is a base
for various metamodels including MOF. InfrastructureLibrary consists of the Core
and Profiles packages, where the latter defines the mechanisms that are used to
customize metamodels and the former contains core concepts used when
metamodelling.
Figure 4-2:
The Core Packages
Core package is divided into a number of packages: PrimitiveTypes,
Abstractions, Basic, and Constructs as it is shown on Figure 4-2 [UMLi 07]:
• PrimitiveTypes package contains a set of basic, predefined types used
for defining syntax of metamodels. Four types are defined, Integer,
Boolean, String and UnlimitedNatural.
• Abstractions package defines abstract metaclasses that are intended to
be further specialized, those metaclasses define basic elements and
associations used in metalanguages (for example Classifier, Element,
Generalization etc.).
• Constructs package, contrary to Abstractions package, mostly contains
concrete metaclasses such as expressions, constraints and others.
• Basic package represents a minimal modelling language with constructs
that are used as the basis for the produced XMI for UML, MOF, and
other metamodels. This package is used to build other metalanguages
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