If you want your institution's repository to be part of the Catalònica collections, it must comply with the Open Archives Iniciative Protocol for Metadata Harvesting (OAI-PMH) interoperability standards.
If so, you can fill in the following registration form, send it to catalonica@bnc.cat, and it will be added.
The collections added by Catalònica can, if they wish, also participate in Europeana with their contents (totally or partially). It will only be necessary to sign an agreement with the Biblioteca de Catalunya.