UML/SysML: MagicDraw/Cameo 19SP3: GOTCHA/TIP: An Instance Table will not display a row for instances typed by an abstract Class/Block (although one can show such instances as InstanceSpecification symbols on a Class Diagram or Block Definition Diagram)
SysPhS-1.1: TwoPinElectricalComponent in 'Figure 39: Electrical blocks, ports & component properties' could be marked abstract
Webel: SysML: Always consider including an abstract (sometimes intermediate) base Block in your domain modelling Generalization hierarchy.
More block Generalization examples: Home entertainment system Gallery Tutorial TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo Section 08:01: The building Blocks of SysML Slide kind SysML Block Definition Diagram (BDD)
If an abstract Block or Class in a domain model has Associations to Blocks or Classes that are not also abstract, it's often a hint that you have not identified a correct abstraction layer.
Classifier::isAbstract : Boolean [1..1] If true, the Classifier can only be instantiated by instantiating one of its specializations. An abstract Classifier is intended to be used by other Classifiers e.g., as the target of Associations or Generalizations Source Unified Modeling Language 2.5.1
Block, Generalization, Association: Home entertainment system Gallery Tutorial TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo Section 08:01: The building Blocks of SysML Slide kind SysML Block Definition Diagram (BDD)
