<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>47</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">M. Sun</style></author><author><style face="normal" font="default" size="100%">Z. Naixião</style></author><author><style face="normal" font="default" size="100%">Luis Soares Barbosa</style></author></authors><secondary-authors><author><style face="normal" font="default" size="100%">J. Cuellar</style></author><author><style face="normal" font="default" size="100%">Zhiming Liu</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">On Semantics and Refinement of UML Statecharts: A Coalgebraic View</style></title><secondary-title><style face="normal" font="default" size="100%">2nd International Conference on Software Engineering and Formal Methods (SEFM 2004), 28-30 September 2004, Beijing, China</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2004</style></year><pub-dates><date><style  face="normal" font="default" size="100%">September</style></date></pub-dates></dates><urls><related-urls><url><style face="normal" font="default" size="100%">https://haslab.uminho.pt/sites/default/files/lsb/files/sefm04.pdf</style></url></related-urls></urls><publisher><style face="normal" font="default" size="100%">IEEE Computer Society Press</style></publisher><pub-location><style face="normal" font="default" size="100%">Beijing, China</style></pub-location><pages><style face="normal" font="default" size="100%">164–173</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Statecharts was conceived as a visual formalism for the design of reactive systems. UML statecharts is an object-based variant of classical statecharts, incorporating several concepts different from the classical statecharts. This paper discusses a coalgebraic description of UML statecharts, directly derived from its operational semantics. In particular such an approach induces suitable notions of equivalence and (behavioral) refinement for statecharts. Finally, a few refinement laws are investigated to support verifiable stepwise system development with statecharts.&lt;/p&gt;
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