I wanna know what is the use of Combine Fragment(loop,alt,opt)
component in sequence diagram toolbar.

Could u pls help me?

Hello,

CombinedFragment is one of UML2 models.

CombinedFragment defines and expression of interaction fragments. A combined fragment is defined by an interaction operator and corresponding interaction operands. Through the use of CombinedFragments, you are able to describe a number of traces in a compact and concise manner.

For details please refer to P.453 of the Unified Modeling Language: Superstructure version 2.0 published by OMG.

To see the image of CombinedFragment, please check at UML 2.0 Models in Sequence Diagram.

Best regards,
Satomi

I would like to use the CombinedFragment for an alternative between 2 messages in my sequence diagram. The correct alternative is choosen based on a condition (pwd ok, pwd nok).

When I click on the CombinedFragment element, I do not see the dashed line that separates the 2 alternatives. How can I create a sequence diagram like shown in http://oldresources.visual-paradigm.com/uml_diagrams/sequence_diagram/using_alternative_combined_fragments_in_sequence_diagram.html ?

Hello Stlecho,

Please follow the direction given below to create the separations with dashed line in the CombinedFragment.

1) Create a CombinedFragment
2) Right-clcik on the CombinedFragment and select [Add operand] from its pop-up menu
























3) A dashed line appears to separate the alternative.

























Repeat if you want more separations.

Best regards,
Satomi