Concept for Setting up an LTA Working Group in the NFDI Section "Common Infrastructures"

NFDI consortia have a variety of disparate and distributed information infrastructures, many of which are as yet
only loosely or poorly connected. A major goal is to create a Research Data Commons (RDC) . The RDC concept1
includes, for example, shared cloud services, an application layer with access to high-performance computing
(HPC), collaborative workspaces, terminology services, and a common authentication and authorization
infrastructure (AAI). The necessary interoperability of services requires, in particular, agreement on protocols
and standards, the specification of workflows and interfaces, and the definition of long-term sustainable
responsibilities for overarching services and deliverables. Infrastructure components are often well-tested in
NFDI on a domain-specific basis, but are quite heterogeneous and diverse between domains.
LTA for digital resources has been a recurring problem for well over 30 years and has not been conclusively
solved to date, getting urgency with the exponential growth of research data, whether it involves demands from
funders - the DFG requires 10 years of retention - or digital artifacts that must be preserved indefinitely as digital
cultural heritage. Against this background, the integration of the LTA into the RDC of the NFDI is an urgent
desideratum in order to be able to guarantee the permanent usability of research data. A distinction must be2
made between the archiving of the digital objects as bitstreams (this can be numeric or textual data or complex
objects such as models), which represents a first step towards long-term usability, and the archiving of the
semantic and software-technical context of the digital original objects, which entails far more effort. Beyond the
technical embedding of the LTA in the system environment of a multi-cloud-based infrastructure, a number of
technically differentiated requirements of the NFDI's subject consortia are part of the development of a basic
service for the LTA and for the re-use of research data.3
The need for funding for the development of a basic LTA service for the NFDI consortia results primarily from the
additional costs associated with the technical and organizational development of a cross-NFDI, decentralized
network structure for LTA and the sustainable subsequent use of research data. It is imperative that the technical
actors are able to act within the network as a technology-oriented community, and that they can provide their
own services as part of the support for also within a federated infrastructure. The working group "Long Term
Archiving" (LTA) is to develop the requirements of the technical consortia for LTA and, on this basis, strategic
approaches for the implementation of a basic service LTA.
The working group consists of members of various NFDI consortia covering the humanities, natural science and
engineering disciplines and experts from a variety of pertinent infrastructures with strong overall connections to
the nestor long-term archiving competence network. The close linkage of NFDI consortia with experienced4
partners in the field of LTA ensures that a) the relevant technical state-of-the-art is present in the group and b)
the knowledge of data producers about contexts of origin and data users interact directly. This composition
enables the team to take an overarching view that spans the requirements of the disciplines and consortia, also
takes into account interdisciplinary needs, and at the same time brings in the existing know-how in the
infrastructure sector.