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The specialization on the lower left restricts the number of cylinders to four, requires a light roll bar, and a total of 24 lug bolts over all the wheels.

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Figure 8-17: Vehicle specialization
SysML-1.6: Figure 8-17: Multiplicity of 'cylinderBR' in 'Vehicle Model 1' should be [4] not [*]
SysML-1.6: Figure 8-17: Multiplicity of 'rollBarBR' in 'Vehicle Model 1' should be [1] not [*] and it has no redefined type for the 'light roll bar'
SysML-1.6: Figure 8-17: Multiplicity of 'lugBoltBR' of 'Vehicle Model 1' should be [6] not [6..8]
Source
OMG Systems Modeling Language (SysML) 1.6
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About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes
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INFO
UML keywords
Generalization
Property::redefinedProperty
SysML keywords
BoundReference
BindingConnector
nested Property
The general block on the top does not restrict the bound properties, except the total number of lug bolts is required to be between 24 and 32, rather than 24 and 40 as the associations in Figure 8-15 allow.
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The specialization on the lower left restricts the number of cylinders to four, requires a light roll bar, and a total of 24 lug bolts over all the wheels.
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The specialization on the lower right restricts the number of cylinders to between six and eight, rules out any roll bar, and limits lug bolts per wheel to between 6 and 7, by giving the end path upper and lower values.
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Figure 8-15 shows an example decomposition for vehicles in a block definition diagram.
Figure 8-16 shows the same decomposition in an internal block diagram that includes bound references. The binding connectors have nested connector ends, because they link inside the parts of the vehicle.
Figure 8-17 shows specializations for vehicles that restrict aspects of nested parts by redefining bound references. Paths for bound references are based on the property paths of the corresponding binding connectors.
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