Directive (EU) 2016/801 of the European Parliament and of the Council of 11 May 2016 on the conditions of entry and residence of third-country nationals for the purposes of research, studies, training, voluntary service, pupil exchange schemes or educa...

Preamble:
‘(7) Migration for the purposes set out in this Directive should promote the generation and acquisition of knowledge and skills. It constitutes a form of mutual enrichment for the migrants concerned, their country of origin and the Member State concerned, while strengthening cultural links and enhancing cultural diversity.‘

Den Europæiske Unions charter om grundlæggende rettigheder