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instance diagram
subject			fact

instance diagram	can contain only links generated by associations, not the associations themselves
	cannot contain a generalization
	has definition A UML diagram that shows objects and the links between them
	is similar to collaboration diagram except that it shows links of associations
	is a subtopic of 5.5 - Instance Diagrams
	is generated by class diagram which means that it contains instances and links that are present in the class diagram, and are consistent with that class diagram
	is a kind of UML diagram
	shows a link between two objects drawn as a simple line
	shows an example configuration of objects and links that may exist at a particular point during execution of a program
	shows an instance of both classes that are joined by an association in the associated class diagram
UML diagram	describes aspects of the architectural model
	has part constraint
	has part note
	see also Unified Modelling Language
diagram	has advantages it conveys or summarizes complex concepts or mechanisms more easily than other techniques
	has problems can be hard for users to interact with or interpret not usable by blind people it can be expensive to program diagram drawing software
	should have a label if its meaning is not obvious, using a caption or pop-up label that appears when the user moves the mouse over it

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