Linked data query wizard: A novel interface for accessing sparql endpoints

In an interconnected world, Linked Data is more important than ever before. However, it is still quite difficult to access this new wealth of semantic data directly without having in-depth knowledge about SPARQL and related semantic technologies. Also, most people are currently used to con-suming data as 2-dimensional tables. Linked Data is by defi-nition always a graph, and not that many people are used to handle data in graph structures. Therefore we present the Linked Data Query Wizard, a web-based tool for displaying, accessing, filtering, exploring, and navigating Linked Data stored in SPARQL endpoints. The main innovation of the interface is that it turns the graph structure of Linked Data into a tabular interface and provides easy-to-use interaction possibilities by using metaphors and techniques from current search engines and spreadsheet applications that regular web users are already familiar with

EU accession and Poland's external trade policy

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Extracting Formal Models from Normative Texts

We are concerned with the analysis of normative texts - documents based on the deontic notions of obligation, permission, and prohibition. Our goal is to make queries about these notions and verify that a text satisfies certain properties concerning causality of actions and timing constraints. This requires taking the original text and building a representation (model) of it in a formal language, in our case the C-O Diagram formalism. We present an experimental, semi-automatic aid that helps to bridge the gap between a normative text in natural language and its C-O Diagram representation. Our approach consists of using dependency structures obtained from the state-of-the-art Stanford Parser, and applying our own rules and heuristics in order to extract the relevant components. The result is a tabular data structure where each sentence is split into suitable fields, which can then be converted into a C-O Diagram. The process is not fully automatic however, and some post-editing is generally required of the user. We apply our tool and perform experiments on documents from different domains, and report an initial evaluation of the accuracy and feasibility of our approach.Comment: Extended version of conference paper at the 21st International Conference on Applications of Natural Language to Information Systems (NLDB 2016). arXiv admin note: substantial text overlap with arXiv:1607.0148

Enhanced journals - a case study with general remarks

The Information Bulletin on Variable Stars - a small astronomy journal published in Hungary - was an early Open Access journal. Now it offers several enhanced features to its reader community. Relying on the rather unique publishing environment existing in the field of astronomy, and on software developed locally, this journal is markedly different from other enhanced journals in certain aspects. We explore the key features of enhanced and common electronic journals: reference linking, database connections, data linking, multi-media content, feedback from the reader community, quality control. We argue that while exploring new avenues of scientific publishing, one should conservatively preserve some traditional values and features. Some aspects of article disassembly - dealing with items smaller than the usual basic publication unit, the article - are explored too. Figures, for example, are article components which might be re-used, used outside the original context