Charles University in Prague, MFF, Department of Software Engineering Czech Technical University in Prague, FIT, Dept. of Software Engineering VŠB–TU Ostrava, FEECS, Department of Computer Science Czech Society for Cybernetics and Informatics Proceedings of the Dateso 2015 Workshop Databases, Texts Specifications, and Objects 2015 http://www.cs.vsb.cz/dateso/2015/ http://www.ceur-ws.org/Vol-1343/ April 14 – 16, 2015 Nepřı́věc u Sobotky, Jičı́n, Czech Republic DATESO 2015 c M. Nečaský, J. Pokorný, P. Moravec, editors This work is subject to copyright. All rights reserved. Reproduction or publication of this material, even partial, is allowed only with the editors’ permission. Technical editor: Pavel Moravec, pavel.moravec@vsb.cz VŠB – Technical University of Ostrava Faculty of Electrical Engineering and Computer Science Department of Computer Science Page count: 141 Edition: 1st First published: 2015 This proceedings was typeset by PDFLATEX. Cover design by Pavel Moravec (pavel.moravec@vsb.cz) and Tomáš Skopal. Originally published under ISBN 978-80-7378-285-6 by MATFYZPRESS publishing house of Faculty of Mathematics and Physics, Charles University, Sokolovská 83, 186 75 Praha 8 – Karlı́n, Czech Republic as its 479th publication. Steering Committee Václav Snášel VŠB-Technical University of Ostrava, Ostrava Karel Richta Czech Technical University, Prague Jaroslav Pokorný Charles University, Prague Program Committee Martin Nečaský (chair) Charles University, Prague Wolfgang Benn Technische Universität Chemnitz, Chemnitz, Germany Václav Snášel VŠB-Technical University of Ostrava, Ostrava Jaroslav Pokorný Charles University, Prague Karel Richta Czech Technical University, Prague Michal Valenta Czech Technical University, Prague Vojtěch Svátek University of Economics, Prague Peter Vojtáš Charles University, Prague Dušan Húsek Inst. of Computer Science, Academy of Sciences, Prague Michal Krátký VŠB-Technical University of Ostrava, Ostrava Pavel Moravec VŠB-Technical University of Ostrava, Ostrava Irena Holubová Charles University, Prague Jiřı́ Dvorský VŠB-Technical University of Ostrava, Ostrava Radim Bača VŠB-Technical University of Ostrava, Ostrava Jan Martinovič VŠB-Technical University of Ostrava, Ostrava Pavel Strnad Czech Technical University, Prague Ondřej Macek Czech Technical University, Prague Robert Pergl Czech Technical University, Prague Martin Kruiš Czech Technical University, Prague Organizing Committee Martin Nečaský (chair) Charles University, Prague Jakub Klı́mek Charles University, Prague Pavel Moravec VŠB-Technical University of Ostrava, Ostrava Preface DATESO 2015, the international workshop on current trends on Databases, In- formation Retrieval, Algebraic Specification and Object Oriented Programming, was held on April 14 – 16, 2015 in Nepřı́věc u Sobotky, Jičı́n, Czech Republic. The 15th year was organized by Department of Software Engineering MFF UK Praha, Department of Software Engineering, FIT ČVUT Praha, Department of Computer Science VŠB-Technical University Ostrava, and Working group on Computer Science and Society of Czech Society for Cybernetics and Informat- ics. The DATESO workshops aim for strengthening connections between these various areas of informatics. The proceedings of DATESO 2015 are also available at DATESO Web site: http://www.cs.vsb.cz/dateso/2015/ and CEUR Workshop Proceeding site: http://www.ceur-ws.org/Vol-1343/ (ISSN 1613-0073). The Program Com- mittee selected 12 papers (8 full and 4 short papers) from 19 submissions, based on two independent reviews. We wish to express our sincere thanks to all the authors who submitted papers, the members of the Program Committee, who reviewed them on the basis of originality, technical quality, and presentation. We are also thankful to the Organizing Committee. Special thanks belong to Czech Society for Cybernetics and Informatics. Our thanks go also to Pavel Moravec who, as copy editor of DATESO Pro- ceedings, helped to prepare this volume and provided technical support for the conference preparation portal. April, 2015 M. Nečaský, J. Pokorný, P. Moravec (Eds.) Table of Contents Full Papers Dynamic Local Scheduling of Multiple DAGs in Distributed Heterogeneous Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Ondřej Votava, Peter Macejko, Jan Janeček Data Structures for Indexing Triple Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Roman Meca, Michal Krátký, Peter Chovanec, Filip Křižka Vocabulary for Linked Data Visualization Model . . . . . . . . . . . . . . . . . . . . . . 28 Jakub Klı́mek, Jiřı́ Helmich Parallel Approach to Context Transformations . . . . . . . . . . . . . . . . . . . . . . . . 40 Michal Vašinek, Jan Platoš Methodologies and Best Practices for Open Data Publication . . . . . . . . . . . 52 Jan Kučera, Dušan Chlapek, Jakub Klı́mek, Martin Nečaský Introduction to Optical Music Recognition: Overview and Practical Challenges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Jiřı́ Novotný, Jaroslav Pokorný Critical Evaluation of Existing External Sorting Methods in the Perspective of Modern Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Martin Kruliš Procedural Code Representation in a Flow Graph . . . . . . . . . . . . . . . . . . . . . 89 Michal Brabec, David Bednárek Short papers Biased k-NN Similarity Content Based Prediction of Movie Tweets Popularity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 Ladislav Peška, Peter Vojtáš UnifiedViews: Towards ETL Tool for Simple yet Powerfull RDF Data Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 Tomáš Knap, Petr Škoda, Jakub Klı́mek, Martin Nečaský Aspect-oriented User Interface Design for Android Applications . . . . . . . . . 121 Jiřı́ Šebek, Karel Richta A Survey on Music Retrieval Systems Using Microphone Input . . . . . . . . . 131 Ladislav Maršı́k, Jaroslav Pokorný, Martin Ilčı́k Author Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141