![UML sequence diagram combined fragment is an interaction fragment which defines a combination (expression) of interaction fragments. UML sequence diagram combined fragment is an interaction fragment which defines a combination (expression) of interaction fragments.](https://www.uml-diagrams.org/notation/sequence-operator-par.png)
UML sequence diagram combined fragment is an interaction fragment which defines a combination (expression) of interaction fragments.
![UML sequence diagram for the parallel composition of "walk" and "wave... | Download Scientific Diagram UML sequence diagram for the parallel composition of "walk" and "wave... | Download Scientific Diagram](https://www.researchgate.net/publication/3091146/figure/fig6/AS:667624975388680@1536185606247/UML-sequence-diagram-for-the-parallel-composition-of-walk-and-wave-hand-behaviors-in.png)
UML sequence diagram for the parallel composition of "walk" and "wave... | Download Scientific Diagram
![Parallel messages in sequence diagram? - General Questions/Discussions - Discuss the Visual Paradigm Parallel messages in sequence diagram? - General Questions/Discussions - Discuss the Visual Paradigm](https://forums.visual-paradigm.com/uploads/default/original/2X/8/85869e0ccad28ca8eb716a0a5a6b919350403ca1.png)
Parallel messages in sequence diagram? - General Questions/Discussions - Discuss the Visual Paradigm
![UML sequence diagram combined fragment is an interaction fragment which defines a combination (expression) of interaction fragments. UML sequence diagram combined fragment is an interaction fragment which defines a combination (expression) of interaction fragments.](https://www.uml-diagrams.org/notation/sequence-operator-critical.png)