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The selection and transformation Behaviors on outgoing ObjectFlows can be used to get information out of a DataStoreNode as if a query were being performed.

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Source
Unified Modeling Language 2.5.1
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About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes
Snippet kind
INFO
UML keywords
Activity
DataStoreNode
ObjectFlow::selection
Behavior
ObjectFlow::transformation
When a DataStoreNode accepts an object token, if that token contains an object with the same identity as an object contained in a token already held by the node, then the duplicate object token shall not be placed on the DataStoreNode.
Full quote
The selection and transformation Behaviors on outgoing ObjectFlows can be used to get information out of a DataStoreNode as if a query were being performed.
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Related snippets
15.4.3.4 Data Store Nodes - A DataStoreNode is a CentralBufferNode that holds its object tokens persistently while its activity is executing.
Related snippets (backlinks)
ObjectNode::selection : Behavior [0..1] ... A Behavior used to select tokens to be offered on outgoing ActivityEdges.
ObjectNode::upperBound : ValueSpecification [0..1] The maximum number of tokens that may be held by this ObjectNode. Tokens cannot flow into the ObjectNode if the upperBound is reached. If no upperBound is specified, then there is no limit on how many ...
(Datastore already has an overwrite semantics)
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