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17 terms

ISYS 401 Chapter 7

Chapter 7 vocabulary
STUDY
PLAY
activity diagram
a type of workflow diagram that describes the user activities and their sequential flow
actor
someone who uses the system (has hands)
agent
titles in activity diagrams that represent who does each activity
ending activity
the terminating point of an activity diagram
guard
a true/false tests to see whether a transition can fire
input message
data going to the system in a system sequence diagram
lifeline
the vertical line under an object on a sequence diagram to show the passage of time for the object
loop
used to repeat a section of the system
note
extra explanation on a system sequence diagram
object
represents an entire automated system in a systems sequence diagram
output message
data returning from the system in a system sequence diagram
starting activity
beginning point for an activity diagram
swimlane
a rectangular area on an activity diagram representing the activities of a single agent
synchronization bar
a symbol in an activity diagram to control the splitting or uniting of sequential paths; also used for loops
system sequence diagram
a diagram showing the sequence of messages between an external actor and the system during a use case or scenario
transition
the movement of an object from one state to another state
use case diagram
a diagram to show the various user roles and how those roles use the system