BDD: Figure 39: Electrical blocks, ports & component properties

This trail version of Figure 39: Electrical blocks, ports & component properties shows more detail than the spec version, including the final Circuit context block that owns the electrical component usages:

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Some minor diagramming differences compared with the spec figure version:

- SysML Ports are used (instead of Association ends with composite aggregation and a user-defined «port» keyword) and just listed.

- The context block Circuit is shown.

Also, in this trail version the block TwoPinElectricalComponent is marked abstract:

Dr Darren says: 'A little bit OCD is not a bad thing in this business!'

The spec example only reuses some of the SysPhSLibrary components, it does not reuse the library versions of Resistor, Inductor, Ground, Capacitor, and DCVoltage that map to standard Modelica library versions.

This is a nice expert tool tip:

MagicDraw/Cameo: If you want to show a Property or Port listed both in its corresponding compartment on a Class or Block symbol and as the end of an Association in the same diagram, set the display option Show Association Ends As Attributes/Ports to 'all'

It's done here so one can see the assignment of the InstanceSpecifications that carry the initial values for the components in the context of Circuit. Each InstanceSpecification is set as the defaultValue of a corresponding Property of Circuit; the values their Slots carry then become so-called initial values (a.k.a. context-specific values) for the corresponding value properties within the context block Circuit (as can be seen its IBD).

To learn more about initial values in SysML visit this separate tutorial trail (otherwise just continue with the next slide):

08:04: Deep configuration using SysML context-specific values

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IBD: Figure 38: Internal structure of the circuit example

Notes

[DISPLAY, FEATURE, TOOL]{INFORMATIVE} MagicDraw/Cameo: If you want to show a Property or Port listed both in its corresponding compartment on a Class or Block symbol and as the end of an Association in the same diagram, set the display option Show Association Ends As Attributes/Ports to 'all'

[MODELLING, STYLE]{RECOMMENDED} Webel vs SysPhS-1.1: Recommend use standard SysML Ports instead of block part property with «port» keyword

[ANTI-PATTERN, ISSUE, WARNING]{INFORMATIVE} There is no «port» stereotype keyword for Port or Property in UML-2.5.1 or SysML-1.6. It is assumed to be introduced in some SysML and SysPhS specification diagrams as a custom or user-defined stereotype for special illustration purposes.

[ANTI-PATTERN, MODELLING] The use of an additional «port» keyword on a Port is usually redundant and causes clutter. The use of an additional «port» keyword on a basic Property is an obsolete trick. Please don't imitate it even if you see it in some specification sample diagrams!

Snippets (quotes/extracts)

[SysPhS-1.1] A.2.2 System being modeled: The electrical circuit has six components: ground, electrical source, inductor, capacitor, and two resistors, see Figure 37.

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