Use Case Symbology NF1 NF1 NF2 NF2 SMO SMO TEST TEST Typical synchronus request/response 1«Interface» Request Message Note the difference in line. The dashed line indicates a response. 2«Interface» Response Message Note the difference in arrowhead. The open arrowhead indicates asychronous invocation. 3«Interface» Callback Message Line colors are used to denote test, existing, an to be developed messages. 4Test Message 5Existing Message 6Message Implemented for Use Case
