![]() An activation bar is a thin rectangular box that is shown on an object’s lifeline when it is active and processing a task. Horizontal arrows show the messages exchanged between the objects. This lifeline represents the object’s existence in the time period being captured. The diagram shows how objects in the system exchange messages and which objects are active at any particular time.Įach object is shown at the top of the diagram and each has a lifeline that descends vertically from its center. Sequence diagrams can also be called event diagrams or event scenarios. UML diagrams are generally used when designing software and databases to make sure that the system will work as required and to reveal potential problems before building the final product.Ī sequence diagram models the interactions between objects in a system in sequential order over time. ![]() Sequence diagrams are one of the 14 diagram types that can be created using the Unified Modeling Language (UML). Methods inherited from interface are sequence diagrams and what are they used for?.MObject accept, delete, getCompositionChildren, getCompositionOwner, getMClass, getStatus, getUuid, isDeleted, isModifiable, isShell, isValid, mGet, mGet, mSet Methods inherited from interface .mapi.Methods inherited from interface .notify.Notifier eAdapters, eDeliver, eNotify, eSetDeliver.Methods inherited from interface .EObject eAllContents, eClass, eContainer, eContainingFeature, eContainmentFeature, eContents, eCrossReferences, eGet, eGet, eInvoke, eIsProxy, eIsSet, eResource, eSet, eUnset.Element getAddedToQuery, getAddedToQuery, getCausedImpact, getCausedImpact, getDiagramElement, getDiagramElement Methods inherited from interface .infrastructure.ModelElement addStereotype, getAttached, getAttached, getDependsOnDependency, getDependsOnDependency, getDescriptor, getDescriptor, getExtension, getExtension, getImpactDependsOn, getImpactDependsOn, getImpactedDependency, getImpactedDependency, getImpactImpacted, getImpactImpacted, getLocalProperties, getLocalProperty, getMatrix, getMatrix, getName, getNote, getNote, getNote, getNoteContent, getNoteContent, getNoteContent, getProduct, getProduct, getProperties, getProperties, getProperties, getProperties, getProperties, getProperty, getProperty, getProperty, getProperty, getStereotype, getTag, getTag, getTag, getTag, getTag, getTagValue, getTagValue, getTagValue, getTagValues, getTagValues, getTagValues, isStereotyped, isStereotyped, isTagged, isTagged, isTagged, putNoteContent, putNoteContent, putNoteContent, putTagValue, putTagValue, putTagValue, putTagValues, putTagValues, putTagValues, removeNotes, removeNotes, removeNotes, removeStereotypes, removeTags, removeTags, removeTags, setLocalProperties, setLocalProperty, setName, setProperty, setProperty, setProperty, setProperty BpmnBaseElement getBpmnContext, getIncomingAssoc, getIncomingAssoc, getIncomingFlow, getIncomingFlow, getOutgoingAssoc, getOutgoingAssoc, getOutgoingFlow, getOutgoingFlow, getPartitionedLaneRefs, getPartitionedLaneRefs Methods inherited from interface .rootElements.BpmnFlowElement getContainer, getGroups, getGroups, getLane, getLane, getSubProcess, isTriggeredByEvent, setContainer, setSubProcess, setTriggeredByEvent Setter for relation 'BpmnSequenceFlow->TargetRef' ![]() The default Sequence Flow is taken (a token is passed) only if all the other outgoing Sequence Flow from the Activity or Gateway are not valid (i.e., their condition Expressions are false).Ī sequence Flow is "default", if has a default association from a flowNode (Gateway or Activity).Ī sequence flow is "conditional" is it originates from an activity, and has a conditionExpression.Ī Sequence flow belongs to a flow element container or a sub process. Such Sequence Flow will have a marker to show that it is a default flow. This Expression is typically used when the source of the Sequence Flow is a Gateway or an Activity.Ī Sequence Flow that has an Exclusive, Inclusive, or Complex Gateway or an Activity as its source can also be defined with as default. The source and target must be from the set of the following Flow Elements: Events (Start, Intermediate, and End), Activities (Task and Sub-Process for Processes), Choreography Activities (Choreography Task and Sub-Choreography for Choreographies), and Gateways.Ī Sequence Flow can optionally define a condition Expression, indicating that the token will be passed down the Sequence Flow only if the Expression evaluates to true. Each Sequence Flow has only one source and only one target. A Sequence Flow is used to show the order of Flow Elements in a Process or a Choreography.
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