The Working Group on “Sustainable Publishing of Metadata” has been active within the Digital Research Infrastructure for the Arts and Humanities (DARIAH) European network since 2016. The working group aims to present and share information regarding ongoing and established projects which deal with the creation, reproduction and sharing of metadata between institutes and researchers within the field of Humanities and Social Sciences. This presentation is a follow-up to the presentation Cracking digital archival research and metadata: Archives Portal Europe (https://metadata.hypotheses.org/53) held during the DARIAH EU meeting in November 2020. This presentation was prepared as part of a Seminar in DANS | Centre of expertise & repository for research data (knaw.nl) on 28 September 2021 and deals with the possibility of synergies between different European infrastructures and European projects, with as concrete case the Parthenos project (PARTHENOS Project – Pooling Activities, Resources and Tools for Heritage E-research Networking, Optimization and Synergies (parthenos-project.eu), Archives Portal Europe (HOME – Archives Portal Europe) and the possibilities of the new archival standard Records in Context (Records in Contexts – Conceptual Model | International Council on Archives (ica.org).