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Your first Sequence diagram

Create a short login flow, change an interaction, and save your work.

AAL Sequence 0.1 · Dictionary 0.1.0

On this page

Your first diagram

  1. Open Projects → New project → Sequence Diagram and give it a name.
  2. The Customer Login starter shows a synchronous request, explicit activation, and return.
  3. Select the Sign in label. Change its label in Identity; leave the field to commit.
  4. Choose Add interaction to add a message, participant, note, activation span, or fragment.
  5. Save, reload, and verify the same sequence and appearance return.

What you should see

Customer and Application are joined by Sign in and Welcome messages. Your edited label remains after saving and reopening; interaction order stays unchanged.

First diagram: Customer Login
CustomeractorApplicationsystemSign inHTTPSWelcome

Read from top to bottom. Solid filled arrows are synchronous calls; the dashed open arrow is a return. The activation exists because it is explicitly authored. Scroll inside the diagram to see its full size. These previews use the editor’s actual layout and SVG renderer.

Read the complete AAL
First diagram: Customer Login
aal sequence "0.1" dictionary "0.1.0"

interaction CustomerLogin "Customer Login" {
    participant Customer "Customer" { type actor }
    participant Application "Application" { type system }
    sequence Login "Customer Login" {
        participants [Customer, Application]
        message SignIn Customer -> Application sync "Sign in" { protocol "HTTPS" }
        activate HandleLogin Application
        message Welcome Application -> Customer return "Welcome"
        deactivate LoginComplete HandleLogin
    }
}