SysML Internal Block Definition Diagram

SysML Internal Block Diagram⌘

• The Internal Block Diagram in SysML captures the internal structure of a block in terms of properties and connectors between properties.
• An internal block diagram is based on the UML composite structure diagram, with restrictions and extensions as defined by SysML.
• All the properties and connectors that appear inside the internal block diagram belong to the block that is named in the diagram heading name.

Property⌘

• A property can represent a role or usage in the context of its enclosing block.
• A reference property is shown by a dashed-outline box.
• Ports are special cases of properties.

Nested Property⌘

• A property name shown inside or outside the property box may take the form of a multi-level name.
• This form of name references a nested property.
• The name of the property is built by a string of names separated by “.”.

BDD/IBD Example⌘

Structure of Power Subsystem (Block Definition Diagram)

IB Diagram for the “Power Subsystem”⌘