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A constraint block is a block that packages the statement of a constraint so it may be applied in a reusable way to constrain properties of other blocks.

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Figure D.26 - Defining Analyses for Hybrid SUV Engineering Development (Block Definition Diagram)
Figure 10-1: Stereotypes defined in SysML ConstraintBlocks package
Source
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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INFO
UML keywords
Constraint
SysML keywords
ConstraintBlock
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A constraint block is a block that packages the statement of a constraint so it may be applied in a reusable way to constrain properties of other blocks.
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A constraint block typically defines one or more constraint parameters, which are bound to properties of other blocks in a surrounding context where the constraint is used.
Binding connectors, as defined in Clause 8 are used to bind each parameter of the constraint block to a property in the surrounding context.
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A constraint block typically defines one or more constraint parameters, which are bound to properties of other blocks in a surrounding context where the constraint is used.
Binding connectors, as defined in Clause 8 are used to bind each parameter of the constraint block to a property in the surrounding context.
All properties of a constraint block are constraint parameters, with the exception of constraint properties that hold internally nested usages of constraint blocks.
A constraint property is a property of any block that is typed by a constraint block. It holds a localized usage of the constraint block. Binding connectors may be used to bind the parameters of this constraint block to other properties of the block ...
A constraint block is defined by a keyword of «constraint» applied to a block definition. Properties of this block define parameters of the constraint, with the exception of properties that hold internally nested usages of constraint blocks.
The usage of a constraint block is distinguished from other parts by a box having rounded corners rather than the square corners of an ordinary part.
A parametric diagram is a restricted form of internal block diagram that shows only the use of constraint blocks along with the properties they constrain within a context.
Figure D.26 defines the various model elements that will be used to conduct analysis in this example. It depicts each of the constraint blocks/equations that will be used for the analysis, and key relationships between them.
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