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Chapter 3. Domain-Specific Modelling
NonProperty
0...*
Property
Graph Object Relationship Role Port
Figure 3.15.: roperties and non-properties in GOPRR
implementations, the set is often limited to strings, numbers, Boolean values, arrays, and
non-properties.
Since GOPRR was designed to develop graphical meta models, a graph instance typically
contains a set of the other non-property elements, as shown in Figure 3.16.
Object
Relationship
Role
0...*
0...*
0...*
Graph
Figure 3.16.: GOPRR graph elements
The complete abstract meta meta model syntax [46, pp. 68-69] is far more complex and is
introduced in Figure 3.17 and Figure 3.18 as an overview. The diagrams were assembled from
Concept
typeName
typeDescription
NonProperty
Property
value
Relationship
Role
Port
Object
Graph
Connection
Binding
Project
multiplicity
name
Figure 3.17.: GOPRR meta meta model abstract syntax for type generalisations
parts of [45], [46], and [56]. The included elements are explained in detail in the following:
Concept is the ancestor or – in object-oriented words – base class [79] for all GOPRR types
/ classes. It holds two attributes: typeName, which is a string storing the name of the
instance and typeDescription, which stores a description as string / text.
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