Figure D.41 - Special Case of Internal Block Diagram Showing Reference to Specific Properties (serial numbers)

Gallery
Tutorial
TRAIL: The SysML-1.6 Hybrid SUV sample and specification diagrams in MagicDraw/Cameo (with annotations) [UNDERGOING UPDATE to SysML1.7]
Section
Section: SysML-1.6: HSUV sample
UML keywords
InstanceSpecification
instance tree
SysML keywords
SysML Internal Block Diagram
initial values
initialValues compartment
context-specific values
TestCase
Keywords
Slide kind
SysML Internal Block Diagram (IBD)
The SysML block compartment name 'initialValues' for what are really "context-specific values" is confusing - even completely misleading; please just think of them as 'contextValues' (and initial values as a special context case)
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SysML-1.6: Spec Figure D.41 refers to 'i:Interior' not 'i:InteriorSubsystem', inconsistent w.r.t. Figure D.16.
Some Connectors 'b-l' and 'i-l' shown in Figure D.17 are missing in spec Figure D.41, and some 'c-p' and 'bk-p' are named inconsistently w.r.t 'p-c' and 'p-bk' in D.17
They are shown and consistently named here in this trail version.
SysML-1.6: Spec Figure D.41 refers to 't:Transmission' not 'trsm:Transmission', inconsistent w.r.t. D.18 and allocation tables (with impact on some connector names).
SysML-1.6: Spec Figure D.41 refers to 'em:ElectricalMotor' inconsistent w.r.t. 'emg:ElectricalMotorGenerator' in D.18 and allocation tables.
The connector names emg-trsm and ice-trsm are shown consistently named here in this trail version.
Dr Darren says:
Please do not be discouraged by all of these errors reported in the spec sample version! Context-specific values are a very useful capability of SysML - an important extension over UML - and a language feature that you are likely to use often during your practical systems engineering, with good tool support

In the tool, you can simply edit these values directly in the IBD by using the context menu item Tools > Define Context Specific Initial Value. Once activated you can edit the values directly like Slot values.

See the next slide for an illustration of the instance tree that carries the values behind the scene in the tool.
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Figure D.41 - Supporting InstanceSpecification tree for 'initialValues (context-specific values) in MagicDraw/Cameo
Notes
[ASSERTION, NAMING, WARNING] The SysML block compartment name 'initialValues' for what are really "context-specific values" is confusing - even completely misleading; please just think of them as 'contextValues' (and initial values as a special context case)
[ISSUE] SysML-1.6: Spec Figure D.41 refers to 'i:Interior' not 'i:InteriorSubsystem', inconsistent w.r.t. Figure D.16.
[ISSUE] Some Connectors 'b-l' and 'i-l' shown in Figure D.17 are missing in spec Figure D.41, and some 'c-p' and 'bk-p' are named inconsistently w.r.t 'p-c' and 'p-bk' in D.17
[ISSUE] SysML-1.6: Spec Figure D.41 refers to 't:Transmission' not 'trsm:Transmission', inconsistent w.r.t. D.18 and allocation tables (with impact on some connector names).
[ISSUE] SysML-1.6: Spec Figure D.41 refers to 'em:ElectricalMotor' inconsistent w.r.t. 'emg:ElectricalMotorGenerator' in D.18 and allocation tables.
[DISPLAY, FEATURE, TIP, TOOL] MagicDraw/Cameo: To show the type of initialValues (context-specific values) use the display option Show Slot Type
[CAVEAT, DISPLAY, TOOL] HSUV trail slide: Figure D.4: IBD: Could not show Connector typed by an anonymous Association as 'connectorName:' with trailing colon
[CAPABILITY, FEATURE, TIP, TOOL] MagicDraw/Cameo: You can edit context-specific values (initial values) directly in an IBD by using the context menu item Tools > Define Context Specific Initial Values on appropriate blocks; once activated you can edit the values directly like Slot values
[FEATURE, TIP, TOOL]{INFORMATIVE} MagicDraw/Cameo: For context-specific values you do not have to deal with fiddly instances, you can edit the values directly in the 'initialValues' compartment! Enable 'Tools > Define Context Specific Initial Value' on a part whose Block has a value.
[FEATURE, TIP, TOOL, WARNING]{INFORMATIVE} MagicDraw/Cameo: The context menu item 'Tools > Define Context-Specific Value' will only be available UNTIL you have assigned one! Thereafter it does not appear anymore because the tool will have already created a tree of instances to carry the values.
[FEATURE, TIP, TOOL, WARNING]{INFORMATIVE} MagicDraw/Cameo: The context menu item 'Tools > Define Context-Specific Value' will only ever be available in an Internal Block Diagram on a part property symbol typed by a Block that has a value property!
Snippets (quotes/extracts)
  [SysML-1.6] Figure D.41[ ]shows a particular Hybrid SUV (VIN number) satisfying the EPA fuel economy test. Serial numbers of specific relevant parts are indicated.
  [SysML-1.6] A compartment with a label of “initialValues” may be used to show values of properties belonging to a containing block. These values override any default values that may have been previously specified on these properties on their originally defining block
  [SysML-1.6] Initial value compartments may be specified within nested properties, which then apply only in the particular usage context defined by the outermost containing block.
  [SysML-1.6] Values are specified in an initialValues compartment by lines in the form <property-name> = <value-specification> or <property-name> : <type> = <value-specification>, each line of which specifies the initial value for one property owned either by ...
  [SysML-1.6] This portion of concrete syntax is the same as may be shown for values within the UML instance specification notation, but this is the only element of UML InstanceSpecification notation that may be shown in an initial values compartment.
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