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Parts in these systems may interact by many different means, such as software operations, discrete state transitions, flows of inputs and outputs, or continuous interactions.

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Source
OMG Systems Modeling Language (SysML) 1.6
Copyright information
About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes
Snippet kind
INFO
UML keywords
part
Property
State
Transition
ParameterDirectionKind::in
ParameterDirectionKind::out
ParameterDirectionKind::inout
ParameterDirectionKind::return
SysML keywords
Block
part property
flow
Continuous
«continuous»
FlowDirectionKind
FlowDirectionKind::in
FlowDirectionKind::inout
ActivityAllocatePartition
Discrete
«discrete»
Keywords
These include modeling either the logical or physical decomposition of a system, and the specification of software, hardware, or human elements.
Full quote
Parts in these systems may interact by many different means, such as software operations, discrete state transitions, flows of inputs and outputs, or continuous interactions.
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Related snippets
Blocks are modular units of system description.
Blocks provide a general-purpose capability to model systems as trees of modular components.
The specific kinds of components, the kinds of connections between them, and the way these elements combine to define the total system can all be selected according to the goals of a particular system model.
Related snippets (backlinks)
It captures the definition of blocks in terms of properties and operations, and relationships such as a system hierarchy or a system classification tree
The Internal Block Diagram in SysML captures the internal structure of a block in terms of properties and connectors between properties.
A block can include properties to specify its values, parts, and references to other blocks.
Ports are a special class of property used to specify allowable types of interactions between blocks ...
Constraint Properties are a special class of property used to constrain other properties of blocks...
Various notations for properties are available to distinguish these specialized kinds of properties on an internal block diagram.
A property can represent a role or usage in the context of its enclosing block. A property has a type that supplies its definition.
A part belonging to a block, for example, may be typed by another block. The part defines a local usage of its defining block within the specific context to which the part belongs.
For example, a block that represents the definition of a wheel can be used in different ways. The front wheel and rear wheel can represent different usages of the same wheel definition.
SysML also allows each usage to define context-specific values and constraints associated with the individual usage, such as 25 psi for the front tires and 30 psi for the rear tires.
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