Digital Research Infrastructure for the Arts and Humanities Project Reference Number: 01UG1110A - M Contact Questions about the research project may be directed to dariah-sub@sub.uni-goettingen.de. For more information, please visit www.de.dariah.eu. 2 About the project About the project What is DARIAH-DE? Currently, 17 partner institutions from the ields of information technology as well as the arts and DARIAH-DE supports digitally-enabled research humanities are involved in DARIAH-DE, including and teaching in the arts and humanities. The universities, data centres, disciplinary institutions, project is developing a research infrastruc- one academy, one commercial partner, and one ture which will ofer tools, core services, and library. access to research data as well as materials for research and education in the Digital Humani- Project coordination: Göttingen State and Uni- ties (DH). versity Library Funding: Federal Ministry of Education and Proile Research (BMBF) project reference number 01UG1110A – M DARIAH-DE is the German national contribution to the European research infrastructure “DARIAH- Duration: The construction phase of DARIAH-EU EU—Digital Research Infrastructure for the Arts is initially scheduled to be completed in 2016. and Humanities” . www.dariah.eu 3 About DARIAH-DE In order to emphasize the added value of Digital Humanities methods, services, and tools, The central mission of DARIAH-DE is to enable discipline-speciic requirements in the form of the interoperability of tools and research data. concrete research questions have been identi- Following internationally valid and accepted ied. Based on these speciications, individual standards and policies, the project aims at ensur- solutions in the form of “demonstrators” have ing their long-term preservation and future use. been developed to demonstrate both speciic DARIAH-DE also supports and advises research- methods and the overall potential for research in ers as well as research projects in planning the Digital Humanities. humanities research initiatives within a digital environment. Research data form an essential basis for scientiic work during the entire research process, Efective ways of handling digital resources, from collecting and analysing data to publica- concepts, and methods in the Digital Humanities tion and the subsequent use by third parties. must be introduced into training and instruction Unrestricted access is one requirement that is for humanities researchers at all educational and of central importance for working with research career levels. In close consultation with discipli- data. DARIAH-DE evaluates, discusses, and nary communities, existing study and training recommends standards for data, metadata, courses are being coordinated, made more licensing, and tools as well as for procedures and visible, and, if necessary, developed more fully. organisational structures. Moreover, DARIAH-DE is developing individual qualiication modules, such as international This infrastructure will enable researchers to workshops for experts dealing with speciic carry out research in an increasingly digital themes. environment, across disciplines and institutions in collaborative ways and towards sustainable In order to establish digital research in the arts and humanities, it is necessary to enhance knowledge of digital research methods and practices. The use and application of these processes is supported by special tools and services that will be designed, adapted, and made available as a basic infrastructure within the context of DARIAH-DE. 4 results. Further information on ESFRI: DARIAH-EU is one of 48 projects on the roadmap Further information on DARIAH-EU: of the European Strategy Forum on Research About the project Interaction of DARIAH-EU and DARIAH-DE ec.europa.eu/research/esfri www.dariah.eu Infrastructures (ESFRI). The European Commission initiated ESFRI in 2002 as a strategic instrument to encourage the scholarly integra- What are the Digital Humanities? tion of Europe and to strengthen its international competitiveness. The Digital Humanities are a ield of research at the intersection of applied computer science The purpose of ESFRI is to support a coherent and the arts and humanities. In this context, and strategic approach towards research infra- complex ICT-supported methods and tools are structures in Europe as well as multilateral initia- systematically explored, developed, and applied tives which will lead to better use and develop- to ind new questions in the arts and humanities ment of research infrastructures on a European and to ind new answers to traditional research and global level. questions. In order to provide the European research The research opportunities will be enhanced networks with a robust organizational and legal through distributed heterogeneous digital form, the European Commission developed the research data as well as by speciic methods European Research Infrastructure Consortium such as digital editing, quantitative text analysis, (ERIC) as a legal entity which is recognized by all dynamic visualization of complex data, and the EU member states. use of interactive historic atlases. DARIAH-DE is the German contribution to DARIAHEU. Apart from DARIAH-DE, several other national DARIAH activities are in place, e.g. in France, the Netherlands, Denmark, and Austria—to name just a few. Together, the pieces of this puzzle it to form DARIAH-EU, the European integrated research infrastructure for the Arts and Humanities. 5 DHd-Blog: www.dhd-blog.org Ailiated projects The DHd blog “Digital Humanities im Several projects, some working on a European deutschsprachigen Raum” was established level, are already using the DARIAH-DE infra- under the leadership of DARIAH-DE and the structure. A list of DARIAH-DE ailiated projects TextGrid consortium which is developing a is available at virtual research environment for textual studies www.de.dariah.eu in the digital humanities. It explores current DH discussions in Germany, Austria, and Switzerland, Is your project or your research group interest- provides information about current develop- ed in working with DARIAH-DE? Please contact ments and technologies, and reports on current research projects. Moreover, it is a platform for information exchange by drawing attention to current funding initiatives, events, and job advertisements. Since the goal is to involve all the active Germanlanguage partners in this ield, the editorial management of the blog is carried out by DH experts from Germany, Austria, and Switzerland. www.dhd-blog.org Are you a Digital Humanities expert and would like to support us with your blogging? Please contact dhdblog@mpiwg-berlin.mpg.de. 6 dariah-sub@sub.uni-goettingen.de Digital Humanities Research DARIAH-DE: Digital Humanities Research Virtual Research Environments Virtual Research Environments (VRE) are essential research resources such as data, analysis and components of modern research infrastructures processing tools, as well as scientiic instrumenta- as well as a complex and steadily evolving con- tion and services.” cept. DARIAH-DE uses the following deinition of VREs from the Alliance of German Science Orga- Virtual Research Environments: A Guide, Priority Initia- nisations Priority Initiative “Digital Information”: tive “Digital Information” of the Alliance of German Science Organisations, 2011, p. 1, www.allianzinitiative. “A virtual research environment is deined as a plat- de/ileadmin/user_upload/Leitfaden_VRE_en_01.pdf form which allows multiple researchers in diferent locations to work together seamlessly. In terms of content, virtual research environments potentially support the entire research process — from the collection, discussion and further processing of data right through to the publication of results. From a technological perspective, virtual environments are based primarily on software services and communication networks, allowing access to physical 7 VRE model (“Blueprint”) DARIAH-DE use cases (Demonstrators) Scholars in the arts and humanities consider VREs to be increasingly important instruments DARIAH-DE is planning and developing tools for their research, much like those in the natural and services, or demonstrators, for the arts and sciences who have long employed VREs as part humanities in cooperation with partner institu- of their scientiic work. DARIAH-DE will produce tions. DARIAH-DE demonstrators exemplify the a VRE model or blueprint to guide scholars and opportunities presented by Digital Humanities developers in the arts and humanities as they and showcase how the DARIAH infrastructure work on designing and implementing new or can support researchers in their scholarly work. modiied VREs. The document will be based on the guideline for VREs published by the Alliance of German Science Organisations Priority Initiative “Digital Information”. The document will contain: 1. A list of questions that can guide the conversations between developers, scholars, and other involved parties 2. The technical features that will be essential for almost every VRE, e.g., user authentication and rights management 3. An overview of past and present VRE funding opportunities 4. A section on the problems experienced by other VRE projects and ideas for avoiding these in your own project. 8 Each DARIAH-DE demonstrator serves as an ex- each demonstrator is oriented around four com- ample that illustrates the added value of digital ponents: research question, research method, methods. For representing prototypical research software, and research data. Research Question Research Method Software Research Data Digital Humanities Research processes and creating signiicant use cases, Fig. 1: Components of DARIAH-DE Demonstrators. 9 In order to provide well directed and sustainable support for humanities research, much attention was focused during the concept phase on the following ive essential criteria: Relationship to DARIAH Sustainability Relationship between Effort and Resources Fig. 2: Requirements for DARIAH-DE Demonstrators. 10 Appropriate Scope Relevance and Visibility in the Research Community rently under development: ▪ Archive-in-a-Box: ▪ Net): Distributed research environment of medieval and early modern age charters from German archive system for data centres and research archives. Exploring TextGridRep with Voyant: ▪ Personendaten-Repositorium (Person Data Repository): Combinations of the Voyant suite of tools and Development of and access to an architecture the TextGrid Repository‘s collection of texts. for aggregating heterogeneous prosopographical data sets. Generische Suche (Generic Search): Distributed metasearch on collections and resources deposited in DARIAH registries. ▪ dennetzwerk (Monasterium Virtual Charters Recommendations and concepts for an networks in the arts and humanities. ▪ ▪ Monasterium Virtuelles Deutsches Urkun- ▪ Virtuelles Skriptorium St. Matthias (Virtual Scriptorium of St. Matthew): Digitisation and permanent storage of histoGeo-Browser: rical material from the medieval Benedictine Re-use of the Europeana 3D interface for pre- library St. Matthew in Trier. senting spatial data in a temporal context. ▪ Interoperabilität durch Normdaten (Interoperability by means of authority iles): Semantic combination of research data with diferent provenances using authority iles. ▪ MEISE (Music Encoding Initiative Score Editor): Specialized music score editor in combination with the standard MEI (Music Encoding Initiative) for encoding written musical notation. 11 Digital Humanities Research The following DARIAH-DE demonstrators are cur- Research about Digital Humanities (DARIAH Bibliography) Access to research data (Collection Registry, Schema Registry, Generic Search) The DARIAH Bibliography is a selective bibliography which is freely available online: www.zotero. Scholars in the arts and humanities use diferent org/groups/dariah_bibliography. It was pro- media types for their academic activities: images, duced collaboratively and will be updated and handwritten notes, printed texts, geodata, ar- expanded with new sections on a regular basis. chaeological artefacts, musical scores, video, and many more, which are all increasingly available The bibliography is organized into sections in digital formats. Few remaining content and on various topics in the Digital Humanities. methodological barriers exist to hinder discovery Currently, bibliographical information about in the arts and humanities. the following topics is available: “Perspectives on Digital Humanities”, “Text Analysis”, “Virtual Access to research data is therefore one of the Research Environments”, “Software and Services”, most important aspects in digital research. But “Digital Humanities Theses“ and “Digital Scholarly because of the diversity of digital data sources Publishing”. and the contained data collections, access to research data can become a complex and some- Because the bibliography is based on Zotero, times even insurmountable barrier for research- some useful functions can be used free of charge ers. with a plug-in for Firefox or by using the Zotero application itself. For further information about Zotero, please refer to: www.zotero.org/support. www.zotero.org/groups/dariah_bibliography If you have any questions about DH research in DARIAH-DE, please contact forschung@dariah.eu 12 A Schema Registry is being developed as one of more metadata schemas. A crosswalk transfers the central elements of the DARIAH-DE research data according to a speciic schema into a new infrastructure. The interoperability between re- data structure based on mappings. The source search data of diferent institutional and discipli- data remain untouched in their decentralised nary origins is made possible through mappings collections. The collections are registered in a and metadata crosswalks. Collection Registry which is a central element of the research infrastructure of DARIAH-DE. A mapping deines a relation between two or Fig. 3: Crosswalk within the Schema Registry. 13 Digital Humanities Research Schema Registry and Collection Registry Generic Search DARIAH is developing a generic search functionality from abstracting from the heterogeneity of collections as well as their data and metadata schemas. It establishes and follows semantic links between structurally distinct collections and their concrete resources. This is achieved search operates with external sources such as by means of crosswalks which connect not only the Getty Thesaurus of Geographic Names for data elements from diferent data formats and geographical normative data or the “Gemein- standards, but also map data types and values. same Normdatei” (GND), the German universal authority ile, for persistent identiiers for per- The generic search provides two complementary sonal names. dimensions for searching within data depending on the variety of collections to be searched at the same time: a broad search in a large set of collections or an intensive search in a small set of collections. The user can move in these dimen- Collection Registry 2 sions by selecting or deselecting collections. With a large set of collections, only few semantic 1 Search Interface 3 links between all collections are followed. This reduces the variety of available search conditions Metasearch Component Schema Registry but expands a search query to a large dataset. External Sources If no semantic relations are deined, the search reduces to a cross collection full-text search. Selected Collections In preparation for a search, the search interface Fig. 4: Generic Search. interacts with the Collection Registry as well as the Schema Registry. The search parameters are If you have any questions regarding research deined by the user. For the interpretation of data in DARIAH-DE, please contact schemata as well as the resolution of references in the research data and metadata, the generic 14 forschungsdaten@dariah.eu Treatment of research data Application of standards Interoperability, sustainability, and the persis- DARIAH-DE ofers a variety of options for re- tence of data as well as conidence in their qual- searchers to facilitate their involvement with new ity are topics of central importance both from a research projects, and digital data management generic and a subject-speciic perspective. The in particular. sustainable use of research data allows for the reuse of research data beyond all subject-speciic, The recommendations issued by DARIAH-DE for institutional, and national borders. The prerequi- the use of data standards are directed towards site for a functional research infrastructure is the speciic ields of the arts and humanities and can long-term archiving and accessibility of research be used directly by researchers for their research data and metadata, including descriptions of the work and projects. Issues of quality and the research data that are as accurate as possible. persistence of digital research data can already be addressed—especially in terms of their interoperability—during the planning phase of the project. 15 Recommendations for researchers DARIAH-DE: Recommendations for researchers Licensing and legal issues well as data and metadata formats (TEI, Dublin Core, OAI-PMH, etc.). In addition to the technical challenges, legal issues surrounding the use of research data which If DARIAH-DE’s recommendations are followed, arise in part from subject-speciic requirements digital documents can be accessed collabora- also need to be considered. For this reason, in tively and administered in an intuitive manner. DARIAH-DE data licences and related legal ques- A further advantage is that documents can be tions are scrutinized with regard to sustainability quickly and easily transferred into DARIAH-DE’s and interoperability in order to issue recommen- research infrastructure, which ofers the follow- dations for their proper treatment. ing features: Researchers often possess research data which they would like to archive in a controlled and sustainable manner. An Archive-in-a-Box ofers a concept to store and manage research data in digital collections, or data repositories, by ▪ management of users and user roles, login via secure authentication, ▪ unambiguous electronic tagging of single Recommendations for researchers Your own repository (Archive-in-a-Box) documents for long-term accessibility, ▪ access to DARIAH-DE‘s search functions as well as research data schemas, and much more. means of local and technical archival systems for the arts and humanities, research centres, and research communities. Easy to install packages (free of charge) ofer possibilities to produce collections or transfer existing data without previous knowledge or signiicant eforts. Each of the recommended platforms ofers connectivity to current and future digital humanities trends—well documented, making the best practical use of available resources, comprising all current and future standards as 17 Institution Researcher Researcher Archivein-a-Box Research Data Researcher Researcher Optional Integration Technical DARIAH-DE Infrastructure Collection Registry Schema Registry Generic Search PID AAI Fig. 6: Archive-in-a-box (recommendation). Setting-up and archiving one’s own collection or If you have any questions regarding research the transfer of existing data into a collection is data in DARIAH-DE, please contact now possible without pre-existing knowledge. 18 empfehlungen@dariah.eu DARIAH-DE: Research Infrastructure In order to ofer tools for research in the digital DARIAH-DE portal – de.dariah.eu structure comprising hardware and software is All components presented in this brochure as necessary, together with management, admin- well as further information will be made accessi- istration, and oversight. In addition, this infra- ble through and interactively linked to each oth- structure forms the basis for the future develop- er in the DARIAH-DE portal. Users will be ofered ment of other tools or complete virtual research a specially prepared browser view. The data from environments. For this reason, DARIAH sees as the registries will also be available for automatic one of its main responsibilities the support of data processing in the semantic web as Linked smaller research projects or individual research- Data. In this manner all of the available data can ers in particular who do not have the opportu- be collected into the DARIAH-EU data pool. The nity to set up their own research infrastructure. DARIAH-DE portal will be developed to a central DARIAH-DE also serves as a point of contact for meeting point for all digital infrastructural needs larger research networks and data centres. for scholars in the arts and humanities. 19 Research Infrastructure humanities, a reliable and stable technical infra- Behind the scenes (How our tools function) The technical DARIAH infrastructure is a service- tors or the collection registry. These software oriented architecture and comprises many components are supported by other software independently utilizable software components. components which perform their tasks in the The user accesses the infrastructure mainly via background, invisible to the user. web applications. Examples for software services directly available to the user are the demonstra- component (e.g. Collection Registry) component (e.g. Wiki) background component (e.g. AAI-Infrastructure) background component (e.g. data base system) hardware Fig. 7: DARIAH-DE infrastructure. 20 component (e.g. Geobrowser) the indings of the research project and the basis several computing centres. Each computing for further work on the same or related topics. centre takes over distinct responsibilities. This Therefore, research data must be preserved division is of major importance as the computing for the long term and be made accessible and centres can best contribute to the infrastructure reusable. To this end, DARIAH-DE is developing by focusing on their own speciic resources, ex- bitstream preservation components that ensure perience, and competence. Centralized access to the correctness of binary data for long periods. In all the software components ensures markedly combination with a persistent identiier service, simpler use of the research infrastructure. data become identiiable and, therefore, citable. All components of the technical DARIAH-DE In addition to data produced as an outcome of infrastructure utilize a central authentication and a research project, DARIAH-DE also considers authorization scheme. This enables users to ac- research data to encompass information about cess the diferent components with only a single the worklow processes employed to create and user name and password. A comprehensive transform the data. This is usually referred to col- rights management system ensures that users lectively as data provenance. During the creation access an area in the infrastructure that is similar and transformation of data, suicient informa- to a workspace and to which only they them- tion about processing steps, utilized equipment, selves and their project colleagues have access. or software, as well as other relevant aspects are In this way, a user’s data is stored and secured stored together with the data to document the from unintended access in the same way as the entire data lifecycle. DARIAH-DE compiles with metadata schemes in a schema registry or source guidelines and best practices for the creation code in a version control system. of provenance data. Following such guidelines ensures interoperability between research data Long-term preservation (Bitstream Preservation, Persistent Identiiers, Provenance) as well as its reuse across project borders. Research data take on a variety of diferent forms and are one of the most important outcomes of research projects. In conjunction with the research documentation, they are evidence of 21 Research Infrastructure The software components are distributed across Data processing (Research Software Hosting) Tools for programmers (Developer Portal) In addition to providing a distributed bitstream DARIAH-DE ofers an environment for software preservation layer, DARIAH-DE is also investi- development. For this purpose, DARIAH-DE has gating solutions for ofering access to highly- set up a developer portal which ofers standard scalable, distributed computing resources. tools to help developers to create, test, and This is achieved by establishing an application maintain source code. Each arts and humanities environment in which specialized research software project can obtain a complete devel- software services are hosted. In this generic ap- opment environment on demand to support proach, users can transfer their software services its development activity. The login data are or request instances of existing services in the synchronized with the DARIAH-DE AAI service distributed application hosting environment and and allow developers to work concurrently on enjoy the reliability, scalability, and availability of diferent projects. An advanced authentication infrastructures provided by the leading German system ensures that users only access the speciic computing centres participating in the project. areas and functions to which they are assigned. The services can also be integrated, as far as Currently the developer portal ofers the follow- required, with the general DARIAH-DE services ing components: (such as AAI, monitoring, etc.) Beyond this application hosting environment, cloud-based solutions are being investigated to provide users with quick, on-demand access to computing resources. These can then be used for scientiic computation, and released afterwards. A longterm goal of this activity is to provide workspaces for compute-intensive tasks which will make it easier to access typical DARIAH-DE resources and services. ▪ Source code management with Subversion ▪ Issue tracking with JIRA ▪ Wiki system with Conluence ▪ Continuous integration with Jenkins ▪ Sonar for code quality management ▪ Software artefact management with Archiva ▪ Collaborative text editing with Etherpad 22 Wiki system Issue Tracking Versioning Reading and writing rights Reading rights Other roles in a working context Reading and writing rights Reading rights Reading and writing rights Reading rights Role „Developer“ in a working context Reading and writing rights Reading rights Role „User“ in a working context Other components Interoperability In addition to crosswalks, DARIAH-DE seeks to re-use, and integrate data from other institutions deine recommendations and best practices to and disciplines? These are some of the crucial as- increase the interoperability of research data pects to consider when building an infrastructure across institutions and disciplines. How can which aims to cater to the arts and humanities as historians integrate data from archaeology? What a whole. Interoperability is in itself a rather broad are the challenges we face when we try to access, topic and includes, as we employ it, the use of 23 Research Infrastructure Fig. 8: DARIAH-DE Developer Portal. protocols and machine interfaces for access- If you have any questions regarding the techni- ing data, interoperability of data and metadata cal infrastructure in DARIAH-DE, please contact formats, adoption of open data licenses, and the infrastruktur@dariah.eu use of machine-readable license formats. If you would like to use the DARIAH-DE infrastructure, please contact How to get involved in building the infrastructure All components in the technical DARIAH-DE research infrastructure provide interfaces utilizing widely accepted open standards to ensure the interoperability of DARIAH-DE with other infrastructures as well as additional, yet to developed or externally provided components. In addition, DARIAH-DE is drafting technical guidelines and best practices documentation to orient software developers not yet familiar with the infrastructure on how best to integrate their products with DARIAH. This guarantees that DARIAH-DE can continue to be extended in the future to meet the speciic requirements of individual projects. 24 register@dariah.eu DARIAH-DE: Teaching Digital Humanities Trainings and Workshops DARIAH-DE is developing training sessions and ate students. These include workshops with workshops targeted at speciic groups: experts/ methodological and subject-speciic concentra- specialists, lecturers, postgraduates, and gradu- tions. Thematic Workshops Experts Workshops Structured PhD Programmes Lecturer Workshops additive modules, like Demonstrator Events Methods Workshops Webinars electronic teaching material Fig. 9: DARIAH-DE training modules. 25 Teaching Digital Humanities Summer Schools DARIAH actively participates in eforts to coordinate curricula in the Digital Humanities—on the national level as well as in the international context. Above and beyond this a study is underway to research the extent to which the Digital Humanities have already been integrated into the course oferings of established disciplines in the humanities. If you have any questions regarding workshops and curricula in DARIAH-DE, please contact 27 Teaching Digital Humanities lehre@dariah.eu Abbreviations and URLs Abbreviations ADeX Archaeological Data eXchange BMBF Bundesministerium für Bildung ERIC European Research Infrastructure Consortium und Forschung GND Common authority iles Research MEI Music Encoding Initiative Charters Encoding Initiative MEISE Music Encoding Initiative Score Federal Ministry of Education and CEI Editor CIDOC-CRM CIDOC Conceptual Reference Model OAI-PMH Open Archives Initiative—Protocol for Metadata Harvesting DARIAH-DE DARIAH-EU Digital Research Infrastructure for the Arts and Humanities TEI Text Encoding Initiative Digital Research Infrastructure for VRE Virtual Research Environment the Arts and Humanities DH Digital Humanities DHd-Blog Digital Humanities in the Germanspeaking area EpiDoc Epigraphic Documents ESFRI European Strategy Forum on Research Infrastructures 28 URLs BMBF www.bmbf.de Brochure on DH Curricula www.cceh.uni-koeln.de/dh-degrees-2011 DARIAH Bibliography www.zotero.org/groups/dariah_bibliography DARIAH-DE www.de.dariah.eu ESFRI ec.europa.eu/research/esfri/ List of DH Curricula www.dig-hum.de/studienstandorte TextGrid www.textgrid.de VRE Guide of the Allianz-Initiative www.allianzinitiative.de/ileadmin/ user_upload/Leitfaden_VRE_de.pdf DARIAH-EU www.dariah.eu Zotero Support www.zotero.org/support DHd-Blog www.dhd-blog.org Email addresses dhdblog@mpiwg-berlin.de register@dariah.eu dariah-sub@sub.uni-goettingen.de infrastruktur@dariah.eu forschung@dariah.eu Info-cceh@uni-koeln.de forschungsdaten@dariah.eu lehre@dariah.eu empfehlungen@dariah.eu 29 Imprint Print run 2,500 copies Publisher Revision: June 2012 DARIAH-DE c/o Niedersächsische Staats- und Universitätsbibliothek Göttingen Abteilung Forschung und Entwicklung This work is licensed under a Creative Commons Papendiek 14 Attribution-ShareAlike 3.0 Germany License. 37073 Göttingen creativecommons.org/licenses/by-sa/3.0/ DOI: 10.3249/webdoc-3590 Typesetting & Layout resolver.sub.uni-goettingen.de/ purl/?webdoc-3590 Heck – Visuelle Kommunikation Patrick Heck Thebäerstraße 55 54292 Trier Print Druckerei Schaubs GbR Gottbillstraße 33 b D - 54294 Trier Icons Font Awesome fortawesome.github.com/Font-Awesome 30 DARIAH-DE is exploring and developing a digital research infrastructure for the arts and humanities. For this purpose, DARIAH-DE is designing new curricula, evaluating and developing digitallysupported research methods and processes, and preparing concepts for the use and management of research data in addition to supplying a technical core infrastructure. www.de.dariah.eu