Papers accepted at ICWE 2018


We are very pleased to announce that our group got 2 papers accepted for presentation at the ICWE 2018 : The 18th International Conference on Web Engineering, which will be held on CÁCERES, SPAIN. 5 - 8 JUNE, 2018. The ICWE is the prime yearly international conference on the different aspects of designing, building, maintaining and using Web applications. The theme for the year 2018 -- the 18th edition of the event -- is Enhancing the Web with Advanced Engineering. The conference will cover the different aspects of Web Engineering, including the design, creation, maintenance, and usage of Web applications. ICWE2018 is endorsed by the International Society for the Web Engineering (ISWE) and belongs to the ICWE conference series owned by ISWE. Here are the accepted papers with their abstracts:

  • Efficiently Pinpointing SPARQL Query Containmentsby Claus Stadler, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo, and Jens Lehmann.
    Abstract: Query containment is a fundamental problem in database research, which is relevant for many tasks such as query optimisation, view maintenance and query rewriting. For example, recent SPARQL engines built on Big Data frameworks that precompute solutions to frequently requested query patterns, are conceptually an application of query containment. We present an approach for solving the query containment problem for SPARQL queries – the W3C standard query language for RDF datasets. Solving the query containment problem can be reduced to the problem of deciding whether a sub graph isomorphism exists between the normalized algebra expressions of two queries. Several state-of-the-art methods are limited to matching two queries only, as well as only giving a boolean answer to whether a containment relation holds. In contrast, our approach is fit for view selection use cases, and thus capable of efficiently enumerating all containment mappings among a set of queries. Furthermore, it provides the information about how two queries’ algebra expression trees correspond under containment mappings. All of our source code and experimental results are openly available.
 
  • OpenBudgets.eu: A Platform for SemanticallyRepresenting and Analyzing Open Fiscal Databy Fathoni A. Musyaffa, Lavdim Halilaj, Yakun Li, Fabrizio Orlandi, Hajira Jabeen, Sören Auer, and Maria-Esther Vidal.
    Abstract: Budget and spending data are among the most published Open Data datasets on the Web and continuously increasing in terms of volume over time. These datasets tend to be published in large tabular files – without predefined standards – and require complex domain and technical expertise to be used in real-world scenarios. Therefore, the potential benefits of having these datasets open and publicly available are hindered by their complexity and heterogeneity. Linked Data principles can facilitate integration, analysis and usage of these datasets. In this paper, we present OpenBudgets.eu (OBEU), a Linked Data-based platform supporting the entire open data life-cycle of budget and spending datasets: from data creation to publishing and exploration. The platform is based on a set of requirements specifically collected by experts in the budget and spending data domain. It follows a micro-services architecture that easily integrates many different software modules and tools for analysis, visualization and transformation of data. Data i represented according to a logical model for open fiscal data which is translated into both RDF data and a tabular data formats. We demonstrate the validity of the implemented OBEU platform with real application scenarios and report on a user study conducted to confirm its usability.
AcknowledgmentThis work was partly supported by the grant from the European Unions Horizon 2020 research Europe flag and innovation programme for the projects HOBBIT (GA no. 688227), QROWD (GA no. 732194), WDAqua (GA no. 642795), OpenBudgets.eu the EU H2020 (GA no. 645833) and DAAD scholarship.
 Looking forward to seeing you at ICWE 2018.