IBD: Figure 59: Internal structure of hydraulics system

The context-specific values for fluidLevel and tankSurfaceArea are shown in the initialValues compartment on fluidReservoir1:Tank and fluidReservoir2:Tank.

Notice how the "shared" Property::defaultValue for each of gravity and fluidDensity (introduced earlier to keep things nice and DRY) are also visible in the initialValues compartment!

Unless an over-riding context-specific values is defined for a value property, any Property::defaultValue defined on it "shines through" (sometimes known as the Translucency Pattern for those of you old enough to remember Perl).

BTW: There is, in any case, more than one way to encapsulate variation between initial conditions for usages, as noted in the spec:

SysPhS-1.1: 'An alternative for specifying initial values of part properties in the ConnectedTanks is to specialize it and redefine the part properties with default values for various configurations ...'

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IBD: Figure 59: Internal structure of hydraulics system (with :values compartment showing)

Notes

[CAPABILITY, FEATURE, STYLE, TIP] TIP: MagicDraw/Cameo: Consider showing the Port name and type label inside the Port symbol! CAVEAT: This loses the direction indicators on Ports typed by Blocks with flow properties (but is fine if ItemFlows show the direction, or for "contract ports").

[ANTI-PATTERN] SysPhS-1.1: In the specification model for Figure 59 the handling of the initial values for some value properties (such as for 'gravity') in Tank usages within context block ConnectedTanks is WET not DRY (breaks Single Source of Truth).

Snippets (quotes/extracts)

[SysPhS-1.1] Figure 59 shows the internal structure of a ConnectedTanks block.

[SysPhS-1.1] Part properties, typed by blocks ... represent components in this system. They are connected to each other through ports, which represent openings in the tanks and pipe ...

[SysPhS-1.1] Item flows on connectors indicate fluid passes through the ports and between the parts. The diagram connects a tank to each end of a pipe.

[SysPhS-1.1] SysML initial values specify property values for components used in internal block diagrams. Figure 59 shows initial values for fluid density, gravity, tank surface area, pipe radius, pipe length, and dynamic viscosity of the fluid ...