Research groups and projects

The Department is active in a broad range of topics related to knowledge and web technologies. At the very beginning of 2015, four research groups have formed, which represent hubs for the diverse scientific activities but also cover educational and industry-transfer activities. The groups are, in turn:

The lightweight ‘joint venture’ of the groups is the Department’s scientific seminar, for historical reasons known as Knowledge Engineering Group seminar (KEG); the KEG website additionally displays the overview of news related to the research within the groups (in English, and slightly different from the ‘official’ announcements of the Department).

The Department is engaged in a large number of  journals, conferences and workshops. Its members are editorial members of prestigious journals, such as Elsevier’s Journal of Web Semantics or IOS Press’ Intelligent Data Analysis, as well as PC members of conferences such as ISWC, ESWC, ECML/PKDD, RuleML, ISMIS, EKAW, SOFSEM or SEMANTiCS.

The Department has also been, since mid 90s, involved in a large number of national and international research projects. Among the most important of the last decade, with substantial funding from either EU or CSF (Czech Science Foundation), have been:

The Department also participated as minor (ad hoc / associate / network) partner in a number of other EU projects, such as MultilingualWeb, PetaMedia, KDubiq, Knowledge Web, OntoWeb, KDnet or MLnet.

Besides the funded projects, there are also long-term informal projects partially aligned with them; they focus on development and maintenance of software tools and other artifacts such as linked datasets, ontologies and standards. The prominent ones are listed in the following table.

Logo Description Contact Group
  EasyMiner inductively learns rules using the “web search” paradigm, over an HTML interface. See Kliegr DMKD
  LISp-Miner is a desktop data mining tool for effectively mining richly structured association hypotheses from tabular data; it also features a grid-based mining solution (LM-Grid) and generation of (nugget-containing) artificial datasets suitable for data mining education (ReverseMiner). See Šimůnek Rauch DMKD
  General Analytics INterceptor tracks and aggregates user interaction with web applications. It powers the platform (placed 2nd out of 17 competitors in the ACM RecSys’13 News Recommender Challenge).
Collaboration with the Web Intelligence group at the CTU.
Kliegr  DMKD

EntityClassifier (THD tool) identifies entities in text and assigns them DBpedia types. It exploits the Linked Hypernym Dataset containing millions of entity-type assignments, of which most are novel w.r.t. both DBpedia and Yago 2s. See and
Collaboration with the Web Intelligence group at the CTU.
Kliegr  DMKD
  Ex extracts information from the web using hand-made extraction ontologies as well as statistical models and local wrappers. See  Svátek  DMKD
  PatOMat is a suite of tools for pattern-based transformation of ontologies and vocabularies. It among other includes a graphical plugin for Protégé, called GUIPOT. Best demo award at EKAW’12. See  Zamazal
  OpenData.CZ is a joint initiative with Charles University, Prague, towards linked open government data publication (in Czech Republic and EU in general). In this context the Public Contracts Ontology has been developed, and a number of open datasets have been RDFized. See  Svátek
   Within the project, an RDF data model for fiscal data based on the Data Cube Vocabulary, has been developed, and is used by the project partners as well as several other parties. Mynarz SWOE
HomeCZ Czech DBpedia is a national branch of DBpedia. It contains structured information in RDF, automatically extracted from Czech Wikipedia using mapping rules and other inventory. Zeman
Logo DB-quizu DB-quiz is a game in which two players strive to connect the three sides of the triangular board by occupying hexagonal fields. A field is occupied through correctly answering a question generated from a fact base: Czech or English DBpedia, or a custom one. The challenging aspects of the game design are question despoilerification and difficulty rating. Mynarz
logo.png SPARQLab is an online exercise book for learning the SPARQL query language. The current version uses the linked dataset of the Czech Social Security Administration. (Both the application and the dataset documentation is currently in Czech only.) Mynarz SWOE
LODSight LODSight is a linked dataset summarization tool with special focus on employed vocabularies. It aims to give insights into a dataset and vocabularies at the same time, by distinguishing between different vocabularies and providing examples of concrete values from the dataset as annotations to the summary graph. Dudáš


PURO is a formalism designed for “style-neutral” ontological background models from which OWL models in different modeling styles can be generated. Two interconnected tools have been developed for authoring PURO models and generation of OWL models from them: PURO Modeler and OBOWLMorph. Dudáš
OOSP OOSP, Online Ontology Set Picker, is a tool for rapidly building tailored collections of ontologies based on their various metrics. Such collections can then be used as benchmarks for testing ontology management tools. The source collections used are LOV and Bioportal. Zamazal SWOE
  NEST is an expert system shell with multiple methods of uncertainty processing and reasoning algorithms. Desktop version at; web-based version at; newest domain-specific application (ontology visualization tool recommender) at  Berka  IIS
  JNVDL is a Java-based tool for controlling the processing and validation of compound XML documents. See  Kosek  WELT
       ITS Support of the Internationalization Tag Set Version 2.0 in the W3C Markup Validator. See and   Kosek  WELT


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