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Reflections on OCL 2

Ed Willink
2020 Journal of Object Technology  
Twenty years after the OCL 2.0 Request For Proposals, it is perhaps long overdue for a review as to how well the resulting semi-formal OCL 2 specification makes the informal OCL 1 specification more precise  ...  We draw on personal experience to explain why recognition of the fatality of the flaws has taken so long.  ...  Acknowledgments Many thanks to Horacio Hoyos Rodriguez and the anonymous reviewers for helpful comments on an inadequate initial submission.  ... 
doi:10.5381/jot.2020.19.3.a17 fatcat:en3ewp4cire6vdnho7w2pya2a4

Extending a UML and OCL Tool for Multi-levels: Applications Towards Model Quality Assessment

Khanh-Hoang Doan, Martin Gogolla
2017 ACM/IEEE International Conference on Model Driven Engineering Languages and Systems  
In this contribution, we extend the UML and OCL tool USE in order to describe multi-level models.  ...  Fig. 2 shows the workflow of our proposal for model quality evaluation, which uses reflective OCL constraints as a major ingredient. IV.  ...  Based on these ideas, we present approaches for model quality assessment. Fig. 1 . 1 Fig. 1. General schema for the three-level modeling. Fig. 2 . 2 Fig. 2.  ... 
dblp:conf/models/DoanG17 fatcat:4qdxjpflvjhw5pnpgsml3jjeq4

Transformation between spin-Peierls and incommensurate fluctuating phases of Sc-doped TiOCl

Jian Zhang, Alexander Wölfel, Maxim Bykov, Andreas Schönleber, Sander van Smaalen, Reinhard K. Kremer, Hailey L. Williamson
2014 Physical Review B  
Temperature-dependent x-ray diffraction on Sc x Ti 1−x OCl gives broadened diffraction maxima at incommensurate positions between T c1 = 61.5 (3) and ∼90 K, and at commensurate positions below 61.5 K.  ...  A novel feature of Sc x Ti 1−x OCl (x = 0.005) is a transformation from one fluctuating phase (the incommensurate phase at intermediate temperatures) to another fluctuating phase (the spin-Peierls-like  ...  ACKNOWLEDGMENTS Single crystals of Sc x Ti 1−x OCl (x = 0.005) have been grown by Alfred Suttner at the Laboratory of Crystallography in Bayreuth.  ... 
doi:10.1103/physrevb.90.014415 fatcat:xexyf2ror5c6xkffzb74lxiabe

Strong doping of the n-optical confinement layer for increasing output power of high- power pulsed laser diodes in the eye safe wavelength range

Boris S Ryvkin, Eugene A Avrutin, Juha T Kostamovaara
2017 Semiconductor Science and Technology  
×10 -29 cm 6 /s [25] transparency carrier density Ntr 6.5×10 17 cm -3 [20] gain cross-section g 3.1×10 -16 cm 2 [20] cavity length L 2 mm stripe width w 100 m AR coating reflectance  ...  The calculations based on this model show that, although p-doping of the p-side of the OCL reduces the build-up of nonequilibrium carriers caused by the current flow, the effect of this on internal loss  ... 
doi:10.1088/1361-6641/aa92fd fatcat:w76mpartrvdbbcugx26rhh4f7u

Cultural Cognition and Public Policy: The Case of Outpatient Commitment Laws

Dan M. Kahan, Donald Braman, John Monahan, Lisa Callahan, Ellen Peters
2009 Social Science Research Network  
We hypothesized that attitudes toward OCLs reflect "cultural cognition" (DiMaggio, P.  ...  effectively OCLs promote public health and safety.  ...  Ruebhausen Fund at Yale Law School, and the Research Network on Mandated Community Treatment of the John D. and Catherine T. MacArthur Foundation.  ... 
doi:10.2139/ssrn.1178362 fatcat:sc42mbl5lzg2nfdopub5lmtbji

Automatic Translation of OCL Meta-Level Constraints into Java Meta-Programs [chapter]

Sahar Kallel, Chouki Tibermacine, Bastien Tramoni, Christophe Dony, Ahmed Hadj Kacem
2015 Studies in Computational Intelligence  
Considering this limitation, we describe in this paper a system that generates metaprograms starting from architecture constraints, written in OCL at the metamodel level, and associated to a specific UML  ...  Environments that provide this functionality only offer it for functional constraints (related to the states of objects in applications) and not for architectural ones (related to the structure of applications  ...  We relied on Java Reflect library to create a new simplified Java metamodel.  ... 
doi:10.1007/978-3-319-23509-7_15 fatcat:mnlk7bbtivb3zmn6ugpil3htqq

Cultural cognition and public policy: The case of outpatient commitment laws

Dan M. Kahan, Donald Braman, John Monahan, Lisa Callahan, Ellen Peters
2010 Law and Human Behavior  
We hypothesized that attitudes toward OCLs reflect "cultural cognition" (DiMaggio, P.  ...  effectively OCLs promote public health and safety.  ...  Ruebhausen Fund at Yale Law School, and the Research Network on Mandated Community Treatment of the John D. and Catherine T. MacArthur Foundation.  ... 
doi:10.1007/s10979-008-9174-4 pmid:19169799 fatcat:x54ugzzndncupm77wutgj26zjy

Report on the Aachen OCL Meeting [article]

Achim D. Brucker, Dan Chiorean, Tony Clark, Birgit Demuth, Martin Gogolla, Dimitri Plotnikov, Bernhard Rumpe, Edward D. Willink, Burkhart Wolff
2014 arXiv   pre-print
As a continuation of the OCL workshop during the MODELS 2013 conference in October 2013, a number of OCL experts decided to meet in November 2013 in Aachen for two days to discuss possible short term improvements  ...  of OCL for an upcoming OMG meeting and to envision possible future long-term developments of the language.  ...  Reflection On the one hand, having reflection in a specification language is sometimes useful, in particular for tool builders.  ... 
arXiv:1408.5698v1 fatcat:dkbjpasrujddzbcek5dccxxjbi

Contactless Measuring Method of Overhead Contact Line Positions by Stereo Image Measurement and Laser Distance Measurement

Kazuyoshi NEZU, Itaru MATSUMURA, Mitsuo ABOSHI, Makoto NIWAKAWA, Takuro KAWABATA, Seiji TABAYASHI
2015 Quarterly Report of RTRI  
Measurement tests on simulated complex OCLs, demonstrated that each OCL is automatically recognized correctly, that measurement errors for contact wire height were less than 2 mm by calibrating the optical  ...  However when measurements are gathered at high speed, such as on conventional lines or Shinkansen lines, errors due to sensor vibration are expected to increase.  ...  On the other hand, wire tension T is given by (2) . T l s g = ρ 8 (2) Where, ρ is the mass of the OCL per 1 m, g is the gravitational acceleration.  ... 
doi:10.2219/rtriqr.56.181 fatcat:kfbjtrx7yvhpterzzr32tuk7pm

Power Supply System Implemented on Polish High Speed Lines and Pantograph-OCL Interaction Quality Assessment Based on Tests Performed on PKP Network

Michał Głowacz, Marek Kaniewski, Artur Rojek
2016 Transportation Research Procedia  
One of the basic parameters limiting the maximum service speed on a given line is the pantograph-OCL cooperation quality.  ...  One of the overhead contact line system examples is an OCL system implemented on CMK mainline. The line was built in the 1970s and nowadays is a backbone of Warsaw to Silesia rail connection.  ...  OCL of type YC150-2CS150 ( Fig. 2a ) has one 150 mm 2 copper messenger wire and its modification YC120-2CS150 ( Fig. 2b ) has copper messenger wire of smaller cross-section equal 120 mm 2 .  ... 
doi:10.1016/j.trpro.2016.05.164 fatcat:ytndzjrp7nc75kfabundpfctku

ITP/OCL: A Rewriting-Based Validation Tool for UML+OCL Static Class Diagrams [chapter]

Manuel Clavel, Marina Egea
2006 Lecture Notes in Computer Science  
Its implementation is directly based on the equational specification of UML+OCL class diagrams. It is written entirely in Maude making extensive use of its reflective capabilities.  ...  We also give notice of the Visual ITP/OCL, a Java graphical interface that can be used as a front-end for the ITP/OCL tool.  ...  The Object Constraint Language (OCL) [2] is a textual constraint language. OCL comes to provide help on precise information specification in UML models.  ... 
doi:10.1007/11784180_28 fatcat:ajeqgkd3vree5cppteb24rswqe

A Metamodel-Based OCL-Compiler for UML and MOF

Sten Loecher, Stefan Ocke
2004 Electronical Notes in Theoretical Computer Science  
Based on this metamodel, we are currently redesigning the Dresden OCL Toolkit.  ...  Apart from basic functionality for processing OCL expressions, the toolkit is designed to support the evaluation of well-formedness rules defined on both models and metamodels.  ...  Common OCL Metamodel As mentioned previously, OCL is expected to be integrated with the common core of MOF version 2 and UML version 2 in the long run.  ... 
doi:10.1016/j.entcs.2003.09.003 fatcat:cvdfhjo6uvdvtfu75vvn3fczva

Navigating Across Non-Navigable Ecore References via OCL

Martin Hanysz, Tobias Hoppe, Axel Uhl, Andreas Seibel, Holger Giese, Philipp Berger, Stephan Hildebrandt
2010 Electronic Communications of the EASST  
This is essential for certain approaches, e.g., incremental evaluation of OCL constraints on models shown by Altenhofen et al. that is used in SAP's Modeling Infrastructure (MOIN).  ...  In this paper, we present an approach that overcomes the aforementioned issue by providing navigation across non-navigable Ecore references via OCL.  ...  Abstract Syntax of OCL Although we did not change the concrete syntax of OCL, we have extended the abstract syntax of OCL to reflect the navigation across non-navigable references.  ... 
doi:10.14279/tuj.eceasst.36.440 dblp:journals/eceasst/HanyszHUSGBH10 fatcat:3imgblac6rcslk7pufxcglquxu

Specific detection of hypochlorite: a cyanine based turn-on fluorescent sensor

Soham Samanta, Senjuti Halder, Utsab Manna, Gopal Das
2019 Proceedings of the Indian Academy of sciences. Chemical sciences  
The probe displayed a highly selective TURN-ON fluorescence response towards hypochlorite among various reactive oxygen species (ROS) and analytes in a mixed aqueous medium.  ...  The sensing process was attributed to the formation of a probe-OCl adduct which results in restricting the donoracceptor extended conjugation. The detection limit was found to be as low as 3 μM.  ...  reflections = 8457, parameters refined = 274, R 1 , I > 2 σ (I) = 0.1438, wR 2 , I > 2 σ (I) = 0.3210, GOF (F 2 ) = 0.993.  ... 
doi:10.1007/s12039-019-1612-y fatcat:bro7mk52o5e2nfj4ozogao56mq

STUDENTS' EXPERIENCES AND PERCEPTIONS OF ONLINE COLLABORATIVE LEARNING IN HIGHER EDUCATION OF KOREA AND THE UAE

Jieun LEE, Gihan OSMAN
2020 The Turkish Online Journal of Distance Education  
With Importance-Performance Analysis, the perceived importance of OCL activities was compared with actual frequency.  ...  Their experiences in terms of frequency, assessment, barriers, support, and attitude for OCL in each country were examined.  ...  Also, assessments of OCL activities are largely focused on outcomes, and not on process.  ... 
doi:10.17718/tojde.849870 fatcat:vteqskpmjng2betexicsspuk3a
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