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UML has several relations (association, aggregation and composition) that seem to all mean the same thing : HAS A. So, what is the difference between them? ... Aggregation [...] is the typical whole/part relationship. This is exactly the same as an association with the exception that ... Rational, UML Notation Guide...
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ootips.org/uml-hasa.html
ootips.org/uml-hasa.html
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Figure 5 shows an aggregation relationship. In this case, the Window class contains many Shape instances. In UML the ends of a relationship are referred to ...
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www.objectmentor.com/resources/articles/umlClassDiagram...
www.objectmentor.com/resources/articles/umlClassDiagrams.pdf
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UML : What is aggregation in UML? Agragation is Weak relation between the two entities, means when then one entity is delteted, then other object will not get affected. Aggregation is a special type of ‘has-a’ relationship between classes where one of the two participating classes is part of oth. ... UML Interview Questions...
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www.geekinterview.com/question_details/40852
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Slide 33 of 39...
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www.bmrc.berkeley.edu/courseware/cs169/spring01/lecture...
www.bmrc.berkeley.edu/courseware/cs169/spring01/lectures/objects/sld033.htm
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This posting is a continuation (Part 2) to the modeling class relationships in UML article dealing with the modeling of assoication, aggregation and composition relationships in UML.
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www.byteonic.com/2006/modeling-association-aggregation-...
www.byteonic.com/2006/modeling-association-aggregation-composition-relationships-in-uml/
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More Info about "OO/UML: Aggregation versus Composition" ... Object Orientation (OO): OO/UML: Aggregation versus Composition ... Let's start with a defition of aggregation from the UML 1.4 glossary:
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www.prestwood.com/aspsuite/kb/document_view.asp?qid=100...
www.prestwood.com/aspsuite/kb/document_view.asp?qid=100035
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UML Reference ... Aggregation is a special case of association. An aggregation is an "part-of" relationship where parts (one or more classes) belongs to a whole (=collection). If the whole is destroyed, the parts are NOT destroyed.
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www.mobilefish.com/tutorials/uml_reference/uml_referenc...
www.mobilefish.com/tutorials/uml_reference/uml_reference_quickguide_aggregation.html
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Monika Saksena, Maria Larrondo-Petrie, Robert France, and Matthew Evett. ... Extending aggregation constructs in UML. In Pierre-Alain Muller and Jean B'ezivin, editors, Proceedings of UML'98 International Workshop, Mulhouse, France, June 3 - 4, 1998, pages 273--280. ESSAIM, Mulhouse, France, 1998.;
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citeseer.ist.psu.edu/context/880388/305742
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Second, the UML has added unnecessary symbols for specific kinds of relationships. The concepts of composition and aggregation are handled in entity/relationship diagrams by simply labeling a relationship part of and composed of.
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www.essentialstrategies.com/publications/modeling/uml.h...
www.essentialstrategies.com/publications/modeling/uml.htm
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