Icon class icon_class fas fa-quote-left icon_class_computed fas fa-quote-left Related content Using SysML ItemFlow on an Association to show compatibility with a physical flow ItemFlow without and with itemProperty - and compatible ItemFlows SysMLv1: MagicDraw/Cameo: If redisplay of an Association with an InformationFlow or ItemFlow creates a strange extra dashed line with «ItemFlow» keywords (separate from the Association) just remove (only) that extra dashed line from the diagram. MagicDraw/Cameo: HOWTO share a "Block-to-Block" ItemFlow - that was created by 'Between Part Types' mode - between two Connectors. (FYI only, not a Webel-recommended technique.) 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 InformationFlow SysML keywords ItemFlow Previous snippet Full quote An ItemFlow describes the flow of items across a connector or an association. It may constrain the item exchange between blocks, block usages, or ports as specified by their flow properties. Next snippet For example, a pump connected to a tank: the pump has an "out" flow property of type Liquid and the tank has an "in" FlowProperty of type Liquid. Related snippets Related snippets (backlinks) For example, a pump connected to a tank: the pump has an "out" flow property of type Liquid and the tank has an "in" FlowProperty of type Liquid. To signify that only water flows between the pump and the tank, we can specify an ItemFlow of type Water on the connector. One can label an ItemFlow with the classifiers of the items that may be conveyed. For example: a label Water would imply that instances of Water might be transmitted over this ItemFlow. Item properties are owned by the common (possibly indirect) owner of the source and target of the item flow, rather than by the source and target types, as flow properties are. Item flows on connectors shall be compatible with flow properties of the blocks usages at each end of the connector, if any. The direction of the item flow shall be compatible with the direction of flow specified by the flow properties. Each classifier of conveyed items on an item flow shall be the same as, a specialization of, or a generalization of at least one flow property type on each end of the connected block usages (or their accessible nested block usages recursively, ... The target flow property type shall be the same as, or a generalization of, a classifier of the item flow or the source flow property type, whichever is more specialized. ItemFlow::itemProperty : Property [0..1] An optional property that relates the flowing item to the instances of the connectors enclosing block. This property is applicable only for item flows realized by connectors. The itemProperty attribute has no ... The itemProperty attribute has no values if the item flow is realized by an Association. An ItemFlow describes the flow of items across a connector or an association. The notation of an item flow is a black arrowhead on the connector or association. The arrowhead is towards the target element. Item flows specify the things that flow between blocks and/or parts and across associations or connectors. Whereas flow properties specify what “can” flow in or out of a block, item flows specify what “does” flow between blocks and/or parts in a particular usage context. This important distinction enables blocks to be interconnected in different ways depending on its usage context. For example, tanks might include a flow property that can accept fluid as an input. In a particular use of tanks, “gasoline” flows across a connector into a tank, and in another use of tanks, “water” flows across a connector into a tank. The item flow in each case specifies what “does” flow on the connector in the particular usage (e.g., gas, water) and the flow property specifies what can flow (e.g., fluid). This enables type matching between the item flows and between flow properties... Visit also Visit also (backlinks) Flags
