![UML sequence diagrams overview of graphical notation - lifeline, message, execution specification, interaction use, etc. UML sequence diagrams overview of graphical notation - lifeline, message, execution specification, interaction use, etc.](https://www.uml-diagrams.org/sequence-diagrams/sequence-diagram-overview.png)
UML sequence diagrams overview of graphical notation - lifeline, message, execution specification, interaction use, etc.
![Figure 3-3 from Message Sequence Chart (MSC) - A Survey of the new CCITT Language for the Description to Traces within Communications Systems | Semantic Scholar Figure 3-3 from Message Sequence Chart (MSC) - A Survey of the new CCITT Language for the Description to Traces within Communications Systems | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/c32930c1a88eeb58255ce47a7d0ee098d052bc48/8-Figure3-3-1.png)
Figure 3-3 from Message Sequence Chart (MSC) - A Survey of the new CCITT Language for the Description to Traces within Communications Systems | Semantic Scholar
![The Message Sequence Charts depicting three scenarios in a phone call... | Download Scientific Diagram The Message Sequence Charts depicting three scenarios in a phone call... | Download Scientific Diagram](https://www.researchgate.net/publication/228962838/figure/fig1/AS:340887889563650@1458285414279/The-Message-Sequence-Charts-depicting-three-scenarios-in-a-phone-call-use-case-The.png)