Interface to Query and Visualise Definitions from a Knowledge Base

Abstract

The semantic linked data model is at the core of the Web due to its ability to model real world entities, connect them via relationships and provide context, which could help to transform data into information and information into knowledge. Linked Data, in the form of ontologies and knowledge graphs could be stored locally or could be made available to everyone online. For example, the DBpedia knowledge base, which provides global and unified access to knowledge graphs is open access. However, both access and usage of Linked Data require individuals to have expert knowledge in the field of the Semantic Web. Many of the existing solutions that are powered by Linked Data are developed for specific use cases such as building and exploring ontologies visually and are aimed at researchers with knowledge of semantic technology. The solutions that are aimed at non-experts are generic and, in most cases, information visualisation is not available. Instead, information is presented in textual format, which does not ease cognitive processes such as comprehension and could lead to problems such as information overload. In this paper, we present a web application with a user interface (UI), which combines features from applications for both experts and nonexperts. The UI allows individuals with no previous knowledge of the Semantic Web to query the DBpedia knowledge base for definitions of a specific word and to view a graphical visualisation of the query results (the search keyword itself and concepts related to it).