An image can also be embedded in the other diagram symbols. Note: If you do not want Cradle to automatically add an * go to the Graphics Settings section of Project Setup and turn off the Automatically add asterisks to diagram's comment symbols option.Īllows you to choose the location of a GIF or JPEG image to be displayed as a diagram symbol. The bdd is also used to define other stereotype elements of definition in the system model such as Constraint Blocks, Signals, Value Types, Ports, Interface Blocks and Activities.
An element instance is either a named instance (see the node in the middle), or an anonymous element as represented by the node on the right: The Block on the left in the following example represents an abstract entity (because it doesn't have a leading colon), whereas the Blocks in the middle and the right are instances of type Tyre. If it only has a type then it is an abstract element. In SysML if an element has a colon in front of the type name, it is an instance of that type. Therefore each linked element can be reused in other places in the system architecture. The compartments display other modelling elements that are cross referenced to the Block. An example Block symbol with multiple compartments is shown below. A new compartment begins with a horizontal dividing line, followed by the compartment title. The Block Definition Diagram (bdd) is used to define each Block's characteristics in terms of it's structural and behavioural features, and relationships between the Blocks such as hierarchical relationships.īlocks have optional compartments that describe Block characteristics. system, system component part, external systems, or items that flow through the system), as well as conceptual entities or logical abstractions. A «block» is a modular unit of structure in SysML that is used to define types of physical entities (e.g.
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