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Electronic Communications of the EASST 
Volume 5 (2006) 

Guest Editors: Dan Chiorean, Birgit Demuth, Martin Gogolla, Jos Warmer 
Managing Editors: Tiziana Margaria, Julia Padberg, Gabriele Taentzer 
ECEASST Home Page: http://www.easst.org/eceasst/ ISSN 1863-2122 

 

Proceedings of the Sixth OCL Workshop 

OCL for (Meta-)Models 

in Multiple Application Domains 

(OCLApps 2006) 

Preface 
 

Dan Chiorean, Birgit Demuth, Martin Gogolla and Jos Warmer 
 

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 ECEASST 

2 / 2 Volume 5 (2006) 

Preface 
 

Dan Chiorean, Birgit Demuth, Martin Gogolla and Jos Warmer 

 
Conceived as a formalism meant to support unambiguous and detailed modeling using UML 

(Unified Modeling Language), OCL (Object Constraint Language) needs adaptation to 

changes expressed in the modeling community.  The requirements that the modelers want to 

see supported today by OCL go far beyond its initial requirements.  The advent of the MDA 

(Model Driven Architecture) vision and the rapid acceptance of MDE (Model Driven 

Engineering) approaches emphasize new application domains (like Semantic Web or Domain 

Specific Languages) and call for new OCL functionalities. 

 

Apart from the requirements asked by application domains, technologies, visions and 

paradigms used in modeling, the formalisms and techniques currently used have to support 

development of large scale applications.  Therefore, efficiency represents another important 

feature that tools supporting OCL must provide.  The OCL is required to ensure a fine balance 

between the use of language in specifying models realized in early life-cycle phases and the 

rigor asked by the strong relationship with formal languages.  Fixing ambiguities reported 

from the OCL specification without affecting the above mentioned balance is also important. 

 

Today, promoting OCL needs a conjoint support from both the research community and the 

industry.  The main target of the OCLApps 2006 Workshop was to organize a debate forum 

joining people from research and industry able to present an updated state of the art in this 

domain, to contribute to the OCL dissemination and use. 

 

The workshop was organized as a part of MoDELS/UML 2006 Conference in Genova – Italy, 

continuing the series of OCL workshops held at previous UML/MoDELS conferences in: York 

(2000), Toronto (2001), San Francisco (2003), Lisbon (2004) and Montego Bay (2005). 

 

This ECEASST volume contains 10 improved and extended papers out of the 18 papers 

already published in the workshop proceedings as a technical report of Technische Universität 

Dresden.  We are grateful to authors for their effort to improve and polish the versions 

presented, according with the feedback received and the workshop discussions. 

 

Last but not least, we are grateful to the members of the Program Committee and to the 

ECEASST redactors for their support. 

 

 

December 2006 Dan, Birgit, Martin and Jos