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

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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)
Figure D.41 - Special Case of Internal Block Diagram Showing Reference to Specific Properties (serial numbers)
Values - CustomCamera with customised Sensor with pixels - IBD
Values - SmartPhone with 2 PhoneCameras - IBD
Values - LuxuryPhoneConfig - IBD
Figure 27: Default values and initial value in SysML
IBD: Arduino Mega2560R3 - headers with pins and logical ports
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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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initial values
initialValues compartment
context-specific values
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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.
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Initial value compartments may be specified within nested properties, which then apply only in the particular usage context defined by the outermost containing block.
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 ...
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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Initial value compartments may be specified within nested properties, which then apply only in the particular usage context defined by the outermost containing block.
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 ...
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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