Creating a flow specification (SysML)
You can create a Flow Specification from a Model, Package or another Flow Specification.
For information about creating a Flow Specification on a Block Definition Diagram, click here 
To create a flow specification from the model or a package:
1. In an appropriate pane, right-click the Model or Package in which you want to create the Flow Specification, and select > > > .
2. Type the name of the Flow Specification, and then press the Enter key.
To create a flow specification from a flow specification:
1. In an appropriate pane, locate the Flow Specification from which you want to create a Flow Specification.
On the 
Ports and Flows pane, all Flow Specifications are listed in the FlowSpecification folder.
Ports and Flows pane, all Flow Specifications are listed in the FlowSpecification folder.2. Right-click the Flow Specification, and select > > .
3. Type the name of the Flow Specification, and then press the Enter key.