1.7 KiB
1.7 KiB
System Sequence Diagram
Metadata
| Key | Value |
|---|---|
| ID | SSD-001 |
| CrossReference | UC-001 |
| Language | en |
| Domain | it |
Version History
| Date | Status | Author | Reviewer | Change | Commit |
|---|---|---|---|---|---|
| 2026-10-13 | Accepted | Jens Tirsvad Nielsen | AI as stand-in for S01 | Initial version | 259d017 |
Source Use Case
Count squirrels by fur colour (UC-001) — scenario: main success scenario. The alternate flow 1a (census file missing) is the second diagram; flow 2a has no system message of its own.
Diagram
@startuml
actor Participant as A
participant ":System" as S
A -> S : countByFurColor(censusFile, summaryFile)
S --> A : summary
@enduml
@startuml
actor Participant as A
participant ":System" as S
A -> S : countByFurColor(censusFile, summaryFile)
S --> A : censusFileMissing
@enduml
System Operations
| Step | Message | Parameters | Return | Use case step |
|---|---|---|---|---|
| 1 | countByFurColor | censusFile, summaryFile | summary (colour count of each fur colour) | 1 (input), 2 (count), 3 (write), 4 (shown to the participant) |
| 1a | countByFurColor | censusFile, summaryFile | censusFileMissing | 1a |
Steps 2 to 4 of the use case are the work of the system inside one operation: the system receives one message and returns one result, so one message covers steps 1 to 4.
Lifecycle Notes
The system instance lives for one run of the program; nothing is kept between runs.