The TOQL systemThe TOQL system Περίληψη Δημοσίευσης σε Συνέδριο Conference Paper Abstract 2015-11-012009enTOQL, is a query language for querying time information in ontologies. An application has been developed that supports translation and execution of TOQL queries on temporal ontologies. A Graphical User Interface (GUI) has been also developed to facilitate user interaction and supports operations such as syntax highlighting, code autosuggestion, loading of the ontology into the main memory, results and error display.http://creativecommons.org/licenses/by/4.0/450-45411th International Symposium on Spatial and Temporal Databases Petrakis Evripidis Πετρακης Ευριπιδης Papadakis Ioannis Παπαδακης Ιωαννης Evdoxios Baratis Nikolaos Maris Sotiris Batsakis Springer Verlag