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To define Interface Block

1. Create Interface Block in the model in one of the following way:
   • From the SysML Block Definition diagram palette, select the Interface Block button, and click the on the diagram pane.
   • In the Model Browser, right-click the Package in which you want to store your interfaces, and select Create Element > Interface Block.
2. Specify Flow Properties in one of the following way:
   • Open the Specification window of Interface Block, select Properties group, click the Create button, and select Flow Property. Type its name, specify its direction, other properties, and click Close.
   • In the Model Browser, right-click the Interface Block, and select Create Element > Flow Property. Type its name, specify its direction, or other properties.

Defined Interface Block and specified its Flow Properties in the Model Browser and Specification window.