21.15109/CONCORDA/GRT2CA Nagy, Dénes Lajos0000-0002-6790-9505(Wigner Research Centre for Physics)Spiering, Hartmut(Institut für Anorganische und Analytische Chemie, Johannes Gutenberg Universität Mainz)Szilágyi Edit0000-0003-3210-0121(Wigner Research Centre for Physics) ARP 2021 Metadata are data about data. The last 15 years saw an increasing need of assigning metadata to experimental data including spectroscopic ones. This fact was due to the requirement of making scientific publications open-access and, apart from non-proprietary research, of depositing raw experimental data (after some embargo time) into open-access repositories. Kutnyanszky Anikó(WIGNER FK)