Charles University in Prague, MFF, Department of Software Engineering Czech Technical University in Prague, FIT, Dept. of Software Engineering TU Ostrava, FEECS, Department of Computer Science Technical University of Ostrava Faculty of Electrical Engineering and Computer Science Department of Computer Science Technical editor: Pavel Moravec 2015 -

aDt abse, http://www.cs.vsb.cz/dateso/2015/ http://www.ceur-ws.org/Vol-1343/

April 14 { 16, 2015

Nepr vec u Sobotky, Jic n, Czech Republic This work is subject to copyright. All rights reserved. Reproduction or publication of this material, even partial, is allowed only with the editors' permission. Page count: 141 Edition: 1st First published: 2015 This proceedings was typeset by PDFLATEX.

Cover design by Pavel Moravec (pavel.moravec@vsb.cz) and Tomas Skopal. Originally published under ISBN 978-80-7378-285-6 by MATFYZPRESS publishing house of Faculty of Mathematics and Physics, Charles University, Sokolovska 83, 186 75 Praha 8 { Karl n, Czech Republic as its 479th publication.

 Steering Committee Charles University, Prague

Technische Universitat Chemnitz, Chemnitz, Germany VSB-Technical University of Ostrava, Ostrava Charles University, Prague Czech Technical University, Prague Czech Technical University, Prague University of Economics, Prague Charles University, Prague Inst. of Computer Science, Academy of Sciences, Prague VSB-Technical University of Ostrava, Ostrava VSB-Technical University of Ostrava, Ostrava Charles University, Prague VSB-Technical University of Ostrava, Ostrava VSB-Technical University of Ostrava, Ostrava VSB-Technical University of Ostrava, Ostrava Czech Technical University, Prague Czech Technical University, Prague Czech Technical University, Prague

Czech Technical University, Prague

 Organizing Committee Charles University, Prague Charles University, Prague VSB-Technical University of Ostrava, Ostrava

DATESO 2015, the international workshop on current trends on Databases, Information Retrieval, Algebraic Speci cation and Object Oriented Programming, was held on April 14 { 16, 2015 in Nepr vec u Sobotky, Jic n, Czech Republic.

The 15th year was organized by Department of Software Engineering MFF UK Praha, Department of Software Engineering, FIT CVUT Praha, Department of Computer Science VSB-Technical University Ostrava, and Working group on Computer Science and Society of Czech Society for Cybernetics and Informatics. 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 Committee 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 Proceedings, helped to prepare this volume and provided technical support for the conference preparation portal.

April, 2015

 M. Necasky, J. Pokorny, P. Moravec (Eds.)

Dynamic Local Scheduling of Multiple DAGs in Distributed Heterogeneous Systems : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Ondrej Votava, Peter Macejko, Jan Janecek Data Structures for Indexing Triple Table : : : : : : : : : : : : : : : : : : : : : : : : : : : : Roman Meca, Michal Kratky, Peter Chovanec, Filip Krizka Vocabulary for Linked Data Visualization Model : : : : : : : : : : : : : : : : : : : : : : Jakub Kl mek, Jir Helmich Parallel Approach to Context Transformations : : : : : : : : : : : : : : : : : : : : : : : : Michal Vasinek, Jan Platos Methodologies and Best Practices for Open Data Publication : : : : : : : : : : : Jan Kucera, Dusan Chlapek, Jakub Kl mek, Martin Necasky Introduction to Optical Music Recognition: Overview and Practical Challenges : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Jir Novotny, Jaroslav Pokorny Critical Evaluation of Existing External Sorting Methods in the Perspective of Modern Hardware : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Martin Krulis Procedural Code Representation in a Flow Graph : : : : : : : : : : : : : : : : : : : : : Michal Brabec, David Bednarek Short papers 1 13 28 40 52 65 77 89 Biased k-NN Similarity Content Based Prediction of Movie Tweets Popularity : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 101 Ladislav Peska, Peter Vojtas Uni edViews: Towards ETL Tool for Simple yet Powerfull RDF Data Management : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 111 Tomas Knap, Petr Skoda, Jakub Kl mek, Martin Necasky Aspect-oriented User Interface Design for Android Applications : : : : : : : : : 121 Jir Sebek, Karel Richta A Survey on Music Retrieval Systems Using Microphone Input : : : : : : : : : 131 Ladislav Mars k, Jaroslav Pokorny, Martin Ilc k