The Represents connector indicates that a Collaboration is used in a classifier, typically in a Composite Structure diagram. The connector is drawn from the Collaboration to its owning classifier.
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OMG UML Specification
The OMG UML specification (UML Superstructure Specification, v2.0, p. 161) states:
"A dashed arrow with a stick arrowhead may be used to show that a collaboration is used in a classifier, optionally labelled with the keyword «represents»."