Message sequence chart: Difference between revisions

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Latest revision as of 16:43, 10 July 2023

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{{Short description|Interaction diagram from the SDL family}}

[[File:Typical MSC (Message Sequence Chart).png|thumb|The diagram shows three entities. At start the phone is disconnected. A user tries to establish a connection. A connection request is sent to the switch and a timer is started. An alternative deals with two possibles responses: 1 - The timer goes off because the switch did not reply and the phone goes back to the disconnected state.2 - The switch grants the connection and the call is established.]]

A '''message sequence chart''' (or '''MSC''') is an [[interaction diagram]] from the [[Specification and Description Language|SDL]] family standardized by the [[International Telecommunication Union]].

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| author=David Harel

| doi=10.1023/A:1011227529550

| s2cid=1551133

|author-link = David Harel}}</ref><ref>{{cite journal

| title=Multiple instances and symbolic variables in executable sequence charts

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| volume=37

| issue=11

| pages=8383–100

| year=2002

| author=David Harel