You can create typed and untyped Flow Properties in the model.
To create a flow property:
1. Right-click the Flow Specification that is to own the Flow Property, point to New, point toSysML, and then click Flow Property.
2. To use an existing item as a type:
a. In the Options group, click the Existing Type option.
b. Select the item that you want to use as a type, and then click OK.
Note that, in the Existing Type: pane, you can click the Find Items button to open the Add New Search Folder dialog where you can specify the Type and a subset or the full Name of the items that you want to find.
To create a new item to use as a type:
a. In the Options group, click the NewType option.
b. From the Type list, select the type of the item you want to create and use as a type.
c. In the Name box, type the name of the item that will be used as a type, and then click OK.
To create an untyped Flow Property:
In the Options group, click the Untyped option, and then click OK.
3. In the dialog, set the direction to inout, in or out as required, and then click OK.
4. Type the required name of the Flow Property, and then press the Enter key.
After creating a Flow Property you can set its multiplicity, and make it read only and shared. For more information, see the Related Topics.