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Space Link Extension - Service Management - CCSDS

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DRAFT RECOMMENDED STANDARD FOR SPACE LINK EXTENSION SERVICE MANAGEMENT<br />

D3<br />

SEQUENCE DIAGRAM<br />

D3.1 GENERAL<br />

Sequence diagrams focus on message interactions between the UM and CM, clearly showing<br />

which messages are sent and who sends them. They describe the document exchange in a<br />

nominal scenario and use interaction frames to show conditional sequencing of messages,<br />

i.e., other scenarios.<br />

D3.2 SEQUENCE DIAGRAM EXAMPLE<br />

Figure E-5 demonstrates the UML conventions used in the sequence diagrams.<br />

UML provides a convention for specifying asynchronous and synchronous messages using<br />

variations in arrowheads. All messages in the specification of an operation are<br />

asynchronous, and thus all sequence diagrams will use the open arrowhead per the<br />

convention specified in the UML 2.0 specification.<br />

<strong>CCSDS</strong> 910.11-R-2 Page E-5 March 2008

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