When a proxy port is connected to multiple internal parts, the connectors have the same semantics as a single binding connector to an aggregate of those parts, supporting all their features, and treating flows and invocations from outside the aggregate...

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SysMLv1.6 Provided/required DirectedFeature contracts for ProxyPorts SHOULD be satisfiable Feature-wise (including as subsets of Features) not necessarily just at the level of entire Blocks (types)! [See also the SysMLv1.7 spec changes.]
SysML directional FlowProperty contracts for ProxyPorts SHOULD be satisfiable Property-wise (including as subsets of Properties) not necessarily just at the level of entire Blocks!
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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
Snippet kind
CONSTRAINT
INFO
UML keywords
Port
part
Feature
SysML keywords
ProxyPort
part property
MD:PartProperty
BindingConnector
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When a proxy port is connected to multiple internal parts, the connectors have the same semantics as a single binding connector to an aggregate of those parts, supporting all their features, and treating flows and invocations from outside the aggregate as if they were to those parts, and flows and invocations it receives from those parts as if they were to the outside.
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This aggregate is not a separate element of the system, and only groups the internal parts for purposes of binding to the proxy port.
Internal connectors to proxy ports can be typed by association blocks, including when the connector is binding. Association
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Proxy ports can be connected to internal parts or ports on internal parts, identifying features on those parts or ports that are available to external blocks.
A Binding Connector is a connector which specifies that the properties at both ends of the connector have equal values.
If the properties at the ends of a binding connector are typed by a ValueType, the connector specifies that the instances of the properties shall hold equal values, recursively through any nested properties within the connected properties.
If the properties at the ends of a binding connector are typed by a Block, the connector specifies that the instances of the properties shall refer to the same block instance.
When a proxy port is connected to a single internal part [or port or internal part], the connector shall be a binding connector, or have the same semantics as a binding connector ...
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Internal connectors to proxy ports can be typed by association blocks, including when the connector is binding. Association
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