This task involves the adaptation and extension of an existing ontology (LT4eL, approx. 1000 concepts) and the fine-tuning of the LT4eL search engine for the needs of the project. Furthermore, an ontology-editing tool will be implemented and integrated into the ATLAS platform to ensure that the cross-lingual search engine can be used for a variety of sets of documents. The task finishes with work on the adaptation of Croatian and Greek lexica.