For upper bounds greater than one, the token removed is the one that has been in the object node the longest. For FIFO ordering, this is the token that is next to be selected, for LIFO it is the token that would be last to be selected. Source OMG Systems Modeling Language (SysML) 1.6
UML2 Types of Pins - metaclasses This content has been marked as discussing an ADVANCED topic! Gallery Tutorial TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo Section 01:04: UML Behavior: Activities quick start Slide kind UML Profile Diagram
ObjectNode::inState : State [0..*] ... The States required to be associated with the values held by tokens on this ObjectNode. Source Unified Modeling Language 2.5.1
ObjectNode::ordering : ObjectNodeOrderingKind [1..1] = FIFO Indicates how the tokens held by the ObjectNode are ordered for selection to traverse ActivityEdges outgoing from the ObjectNode. Source Unified Modeling Language 2.5.1