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UML Element Description
Node Instance
Node Instance    
A node instance represents a distinct instance of a node. It is an actual instance of a resource that carries out the work of the system. It has unique identity as well as attribute values, which determine its state at any point in time. A node instance can exhibit behavior, but only as a result of being an instance of a node. A node instance is an instance of one (and only one) node.
Node
Node    
A node is a physical resource, that carries out some of the work of the system. It can be an electronic, mechanical or human resource.
Node Association
Node Association    
A node association is a structural relationship between two nodes. It represents a physical connection between the two nodes; the connection may express a communication path or a type of network.
Execution Environment
Execution Environment    
An execution environment is a type of node. It is a logical resource that acts as a location to deploy specific types of artifacts and components, and has the power to perform computations. Artifacts and components can be deployed to an execution environment and typically rely upon services offered by the execution environment to carry out their work.
Device
Device    
A device is a type of node. It is a physical resource and has the power to perform computations. Artifacts and components can be deployed to a device and typically rely upon services offered by the device to carry out their work. A device may be composed of other devices as part of a hierarchy of nested devices.
Multiplicity
Multiplicity    
multiplicity is a property of an association end that specifies the number of instances of the classifier connected at the target end (near end) that can be associated with a single instance of the classifier at the source end (far end). It is specified in the form of a string stipulating a possible infinite number governed by a lower and upper bound.
Loop (Combined Fragment)
Loop (Combined Fragment)    
A loop interaction operator (signified by the value of loop) defines a combined fragment where the messages contained in the fragment are repeated a number of times. The guard contains a lower bound defining the minimum number of times the operand must loop, an upper bound defining the maximum number of times the operand will be executed and a boolean expression (evaluated after the operand has looped the minimum number of times) which if false will terminate the loop.
Comment (Note)
Comment (Note)    
A comment can contain textual information or graphical symbols that add additional information to a diagram or model. The information can take many forms from very formal, in the case of constraints, to conversational, in the case of working notes. Comments can be placed anywhere in a model or diagram, and simply by their proximity and alignment; they can be applicable to one or more elements. They may also be attached either to one or more elements by a comment attaching line.
Dependency
Dependency    
A dependency is a type of relationship that signifies that one element, or group of elements, acting as the client depends on another element or group of elements that act as a supplier. It is a weak relationship that denotes that if the supplier is changed the client may be affected. It is a unidirectional relationship.
Class
Class    
A class represents some concept, physical or otherwise, in the system being modeled. Classes describe sets of things or concepts that have similar attributes, behavior and relationships. They are a higher order concept to objects, which represent instances of the class.
Package
Package    
A package is a grouping of model elements. Packages group any set of zero or more model elements, including packages themselves, with the condition that no model element exists in more than one package. The package also defines the extent of names.
Comment (Note) Attaching Line
Comment (Note) Attaching Line    
A comment attaching line is a dashed line that is used to attach a comment (note) to a model element in a diagram. The comment (note) attaching line is not a UML relationship and has no semantics beyond signifying that the contents of a comment apply to the model element it is attached to. A comment may be attached to any number of model elements or may exist in isolation and by placement in proximity to one or more model elements signify that it applies to those elements.
Artifact (Keyword Presentation)
Artifact (Keyword Presentation)    
An artifact (keyword presentation) is a visual synonym of an artifact. It adds no additional semantics; it is simply an alternative presentation of the element. The standard form of this element is considered to be the artifact displayed with a small icon in the top left hand corner of a classifier rectangle.
Unified Modeling Language and UML are either registered

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