Node (UML): Difference between revisions

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{{notability|date=October 2015}}

[[file:Nodes.PNG|thumb|240px|Two execution environments instances nested in a device instance ]]

{{Refimprove|date=February 2009}}

A '''node''' In the [[Unified Modeling Language]] (UML) is a computational resource upon which [[artifact_(UML)|artifact]]s may be deployed for execution.

<ref name= "OMG UML V2.1.2"> OMG (2008). ''[http://www.omg.org/spec/UML/2.1.2/Superstructure/PDF OMG Unified Modeling Language (OMG UML), Superstructure, V2.1.2]'' p.199-210.</ref>

[[fileFile:Nodes.PNG|thumb|240px|Two execution environments instances nested in a device instance ]]

A '''node'''<ref name=OMG>{{cite book

|chapter=Nodes

|title=Unified Modeling Language 2.5.1

|series=[[Object Management Group |OMG]] Document Number formal/2017-12-05

|date=December 2017

|publisher=[[Object Management Group]] Standards Development Organization (OMG SDO)

|page=387, 396, 403, 657

|url=https://www.omg.org/spec/UML/2.5.1/PDF

}}

</ref>

A '''node''' Inin the [[Unified Modeling Language]] (UML) is a computational resource upon which [[artifact_artifact (UML)|UML artifact]]s may be deployed for execution.<ref name=OMG/>

There are two types of nodes: ''device'' nodes and ''execution environments''.

* A divesdevice representrepresents hardware devices: a physical computational resource with processing capability upon which [[Artifact_Artifact (UML)|UML artifact]]s may be deployed for execution. Devices may be complex (i.e., they may consist of other devices).<ref name= "OMG UML V2.1.2">OMG (2008). ''[http://www.omg.org/spec/UML/2.1.2/Superstructure/PDF OMG Unified Modeling Language (OMG UML), Superstructure, V2.1.2] {{Webarchive|url=https://web.archive.org/web/20100923033721/http://www.omg.org/spec/UML/2.1.2/Superstructure/PDF |date=2010-09-23 }}'' p.199-210.</ref>

* An execution environmentsenvironment representrepresents [[software containerscontainer]]s (such as operating systems, JVM, servlet/EJB containers, application servers, portal servers, etc.) This is a node that offers an execution environment for specific types of components that are deployed on it in the form of deployable artifacts.<ref name= "OMG UML V2.1.2"/>

Execution environments can be nested. Nodes can be interconnected through communication paths to define network structures. A ''communication path'' is an "association between two DeploymentTargets, through which they are able to exchange signals and messages".<ref name= "OMG UML V2.1.2"/>

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==References==

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{{UML}}

[[Category:Unified Modeling Language]]

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