| Abstract: |  After the World Wide Web Consortium (W3C) introduces the newer version of the Web Ontology Language (OWL 2) in 2009, a demand for a new more expressive query language for OWL 2 DL ontologies was rising which resulted in the creation of the SPARQL-DL. This document describes the designing, development and integration of a graphical visualization and editing query tool for the semantic web based on the new query language SPARQL-DL. This document introduces the current state of the semantic web and explains the need of a query tool that will ease the query building process. I continue with more detailed introduction to the technologies and standards involved in the semantic web, namely OWL2 SPARQL SPARQL-DL. Then I describe two designed graphical models and their basic features after which I discuss their capabilities and suggest feature extensions of the model. Afterwards I discuss the implementation of the tool. Firstly I give an overview of the used technologies and libraries. In subsequent chapters I present the detailed description of the designed API and present some implementation design decisions. Next I shortly discuss the possibilities for integration of the tool in practice. Finally summarize the reached results.
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