Comments on: UML – Composition and Aggregation http://bkmjournal.wordpress.com/2008/06/29/uml-composition-and-aggregation/ Just another WordPress.com weblog Sun, 20 Sep 2009 14:14:04 +0000 http://wordpress.com/ hourly 1 By: Pirsey http://bkmjournal.wordpress.com/2008/06/29/uml-composition-and-aggregation/#comment-30 Pirsey Fri, 24 Apr 2009 10:57:19 +0000 http://bkmjournal.wordpress.com/2008/06/29/uml-composition-and-aggregation/#comment-30 This is very up-to-date info. I think I'll share it on Delicious. This is very up-to-date info. I think I’ll share it on Delicious.

]]> By: Jim http://bkmjournal.wordpress.com/2008/06/29/uml-composition-and-aggregation/#comment-18 Jim Fri, 20 Mar 2009 08:07:14 +0000 http://bkmjournal.wordpress.com/2008/06/29/uml-composition-and-aggregation/#comment-18 Very concise and easy to understand. Thanks for this. Very concise and easy to understand. Thanks for this.

]]> By: TaoCampa http://bkmjournal.wordpress.com/2008/06/29/uml-composition-and-aggregation/#comment-17 TaoCampa Thu, 12 Mar 2009 18:06:00 +0000 http://bkmjournal.wordpress.com/2008/06/29/uml-composition-and-aggregation/#comment-17 Very clear your extract fo the text of Page-Jones. What here is called Composition and Aggregation is well known in the semantic data model field as Aggregation and Grouping (see, for instance, the SDM-Sematic Data Model of Hammer & McLeod). In my opinion the only significant distiction of the two concepts is the "The parts are not alike" for composition and "The partes are alike" for the aggregation. Since in real world models not all objects must be physical things, we can call a couple as a (heteromic) composition of a man and a woman. But, in a polygamic society a man can participate on many couples (~rule 2). A person is a composition of its head, arms and its legs. But, he(she) can lose its legs and continues to be a person (~rule 1). Very clear your extract fo the text of Page-Jones. What here is called Composition and Aggregation is well known in the semantic data model field as Aggregation and Grouping (see, for instance, the SDM-Sematic Data Model of Hammer & McLeod).
In my opinion the only significant distiction of the two concepts is the “The parts are not alike” for composition and “The partes are alike” for the aggregation.
Since in real world models not all objects must be physical things, we can call a couple as a (heteromic) composition of a man and a woman. But, in a polygamic society a man can participate on many couples (~rule 2). A person is a composition of its head, arms and its legs. But, he(she) can lose its legs and continues to be a person (~rule 1).

]]> By: Kishore Kumar http://bkmjournal.wordpress.com/2008/06/29/uml-composition-and-aggregation/#comment-14 Kishore Kumar Sun, 26 Oct 2008 09:25:11 +0000 http://bkmjournal.wordpress.com/2008/06/29/uml-composition-and-aggregation/#comment-14 Check out my blog post for a real-world example of composition: http://advanceduml.wordpress.com/2008/09/26/what-a-month-in-the-financial-sector/ Check out my blog post for a real-world example of composition:

http://advanceduml.wordpress.com/2008/09/26/what-a-month-in-the-financial-sector/

]]> By: neonryfource http://bkmjournal.wordpress.com/2008/06/29/uml-composition-and-aggregation/#comment-12 neonryfource Sun, 03 Aug 2008 05:40:49 +0000 http://bkmjournal.wordpress.com/2008/06/29/uml-composition-and-aggregation/#comment-12 Thanks ! Thanks !

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