The aim of the FBC-Tene project is to increase the availability of digital collections of ISPs of Polish cultural and scientific institutions by expanding the website of the Federation of Digital Libraries (FBC, https://fbc.pionier.net.pl/) in the field of searching for digital objects based on text and note content. As a result, target user groups will be given the opportunity to reach information not yet available and significantly increase the efficiency of their operations in the field of searching PSI resources. FBC aggregates data from more than 120 online repositories, libraries, archives, museums and digital galleries, and enables users to search these distributed resources in a single portal and thus quickly reach a huge number of materials (over 6.5 million). The result of the search is links to objects found in FBC aggregated digital collections. Currently, data subject to aggregation only includes metadata of materials made available by individual digital collections. The subject of the project is the extension of the functionality of FBC by extending the aggregation from metadata of materials with their textual and musical content. Thanks to this, it will be possible to search the content of materials, which will increase their availability and significantly improve the effectiveness of the search process. FBC provides information on materials of different types in many digital forms: from text documents to audio-visual materials to so-called music (e.g. musical documents).