Flexibility in Metadata Schemes and Standardisation: the Case of CMDI and the DANS EASY Research Data Repository
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The document discusses the flexibility and standardization of metadata schemes in the context of CMDI and DANS research data repositories, highlighting the challenges of semantic interoperability and the need for enriched indexing. It outlines solutions for integrating CMDI metadata into Dataverse through a pipeline for extracting, transforming, and loading data, along with lessons learned regarding community perspectives on standardization. The future vision includes repositories as nodes in a searchable knowledge graph, facilitating automatic semantic enrichment while addressing issues of provenance and governance.
Flexibility in Metadata Schemes and Standardisation: the Case of CMDI and the DANS EASY Research Data Repository
- 1. Flexibility in Metadata Schemes and Standardisation: the Case of CMDI and DANS Research Data Repositories Slava Tykhonov; Jerry de Vries; Eko Indarto; Andrea Scharnhorst; Femmy Admiraal; Mike Priddy (DANS-KNAW) Presentation at ISKO Knowledge Organisation Research Observatory 24 Nov 2021 RESEARCH REPOSITORIES AND DATAVERSE: NEGOTIATING METADATA, VOCABULARIES AND DOMAIN NEEDS
- 2. Content - Introduction - Who we are - CMDI in the ‘wild’ - CLARIN data collections in EASY - Creating FAIR metadata and semantic services - case of CMDI Pipeline - Extract-Transform-Load (CMDI) metadata into Dataverse - Workflow for linking external concepts to (CMDI) metadata values to make metadata FAIR - Lessons learned and pointers
- 3. Introduction DANS - Royal Netherlands Academy of Arts and Sciences - research data expertise center - long-term preservation - archive (www.easy.dans.knaw; Dataverse.nl; Narcis.nl) CLARIAH.nl Large Scale Infrastructure Project for Humanities (CLARIN+DARIAH) DARIAH: Digital Research Infrastructure for the Arts and Humanities CLARIN: Common Language Resources and Technology Infrastructure CMDI: Component MetaData Infrastructure: a framework to describe and reuse metadata blueprints SKOSMOS: Open source web-based SKOS browser and publishing tool Challenge How to make the datasets from the CLARIN community in the long-term archive discoverable in the CLARIN infrastructure? How to search ‘in data’ ? = How to achieve richer indexing of metadata?
- 4. The problem - on a generic level
- 5. Vision: Semantic interoperability on the infrastructure level We envision a situation where thousands of Dataverse instances (due to EOSC) on the web can be simultaneously search for data. The old dream of Federated search/Universal catalogue can only be realised if: (1) Cross -walks; mapping across different metadata schemes are implemented (2) In metadata schemes we seek for ways to enrich indexes with values from controlled vocabularies Standard response = standardisation and harmonisation = repository software, certain metadata standards, or certain controlled vocabularies New response = explore agile solutions (Proof of Concept) which can be implemented by different communities (even smaller ones), so we keep variety and still enable integration.
- 6. The problem - on a concrete level CMDI ‘in the wild’
- 7. Content - Introduction - Who we are - CMDI in the ‘wild’ - CLARIN data collections in EASY - Creating FAIR metadata and semantic services - case of CMDI Pipeline - Extract-Transform-Load (CMDI) metadata into Dataverse - Workflow for linking external concepts to (CMDI) metadata values to make metadata FAIR - Lessons learned and pointers
- 8. Conceptual approach: Semantic interoperability on the infrastructure level - building common solutions for everyone Dataverse Semantic API in release 5.6: https://github.com/IQSS/dataverse/releases/tag/v5.6 “Dataset metadata can be retrieved, set, and updated using a new, flatter JSON-LD format - following the format of an OAI-ORE export (RDA-conformant Bags), allowing for easier transfer of metadata to/from other systems (i.e. without needing to know Dataverse's metadata block and field storage architecture). This new API also allows for the update of terms metadata“. External controlled vocabularies support is being developed by DANS in SSHOC project and already integrated in Dataverse core in release 5.7. Proposal: https://docs.google.com/document/d/1txdcFuxskRx_tLsDQ7KKLFTMR_r9IBhorDu3V_r445w/ Interfaces: http://github.com/gdcc/dataverse-external-vocab-support Integrations: Wikidata, ORCID, MeSH, Skosmos vocabularies
- 9. CMDI Pipeline - Backbone of our pipeline: Extract-Transform-Load (CMDI) metadata into Dataverse - One block relevant for semantic services: Mapping across metadata standards - Another block: Look-up for values in controlled vocabulary registers - enrich indexing
- 10. SEMAF: A Proposal for a Flexible Semantic Mapping Framework Proposal: https://zenodo.org/record/4651421#.YT9lyC8RpZI POC: https://github.com/Dans-labs/semaf-poc
- 11. Coming close to the implementation 1. Use Data Catalog Vocabulary (DCAT) mappings for CMDI metadata fields 2. Simple Knowledge Organization System (SKOS) to model a thesauri-like resources with simple skos:broader, skos:narrower and skos:related properties 3. Load CMDI properties and attributes and build a Knowledge Graph out of all elements 4. Enrich the Knowledge Graph with concept URIs from various controlled vocabularies like Skosmos hosted or Wikidata 5. Use different format data-serialization formats suitable for the integration with different systems. For example, json-ld suitable for Dataverse, turtle for Jena Fuseki, RDF for LoD frameworks
- 12. Complexity of CMDI is unfolding After the implementation ● Complexity in CMDI becomes more visible ● Identify core concepts which can be mapped to standard bibliographic schemes as DCAT (red box) ● Possibility to match values of CMDI concepts to other controlled vocabularies (green box)
- 13. How does it look when implemented in Dataverse? Every field can be linked to the appropriate controlled vocabularies in FAIR way!
- 14. Greater vision: Dataverse metadata schemas ingested into a Knowledge Graph Compound keyword field with SKOS We use SKOS relationships to keep the hierarchy and relationships between metadata fields Other Dataverse schemas: https://github.com/Dans-labs/semaf-client/tree/cmdi/schema
- 15. Once in a Knowledge graph: what can we do? Pipeline managed to establish some relationships to Wikidata concepts and automatically updated the dataset with new conceptURIs! The example of automatic enrichment with Wikidata
- 16. Content - Introduction - Who we are - CMDI in the ‘wild’ - CLARIN data collections in EASY - Creating FAIR metadata and semantic services - case of CMDI Pipeline - Extract-Transform-Load (CMDI) metadata into Dataverse - Workflow for linking external concepts to (CMDI) metadata values to make metadata FAIR - Lessons learned and pointers
- 17. Lessons learned (I) Scientific communities and archives have different perspectives on standardisation, and semantic services. In research formalisation (including KOS, ontologies, any ‘model’) is a heuristic device, agile to new research questions, and so intrinsically ‘not interoperable’. In other words, there is a difference between research needs and information needs.
- 18. Lessons learned (II) - We provided a solution for our CMDI problem - by creating a CLARIN compatible Dataverse solution, which via an API can be harvested by the CLARIN search service; we also created another perspective on the CDMI ‘challenge’ - We used Dataverse is a platform due to an open active community; - The examples we showed you some of are results of a ‘Vision Lab’ - proof of concepts - funded in projects as SSHOC, CLARIAH, EOSC - The results are envisioned be implemented locally. - But, in principle the solutions are platform agnostic.
- 19. Lessons learned (III) - In the future, repositories might become nodes in a large searchable knowledge graph and semantic links might enable pathways for contextual/semantic search. - Part of this future will be automatically supported semantic enrichment at the local instantiations (automatic indexing in a net instead of in an index) - Problem: keep provenance, authority (trust) - governance between those (micro-service) providers need to be organised. What can we learn from history?
- 20. References - pointers CMDI exploration tool DANS CMDI converter github CMDI properties frequency VLO top profiles CMDI core metadata proposal Core metadata components design for use cases DANS CMDI metadata generator CMDI metadata model published as TSV files Convertor can extract and show the hierarchy of all fields CLARIAH compliant Dataverse Docker module Dataverse Docker with CMDI metadata schema Core metadata components design guidelines Guidelines link Semantic Gateway as plugin app Dataverse gateway Semantic Gateway API Dataverse metadata schema ingested into Graph https://github.com/Dans-labs/semaf-client/tree/cmdi/sche ma
- 21. References - pointers Dataverse 5.7 https://github.com/IQSS/dataverse/releases/tag/v5.7 Semantic Gateway: https://github.com/Dans-labs/semantic-gateway SSHOC task 5.2 http://github.com/SSHOC SEMAF client https://github.com/Dans-labs/semaf-client CMDI data model and namespaces: M. Windhouwer, E. Indarto, D. Broeder. CMD2RDF: Building a Bridge from CLARIN to Linked Open Data Flexible Metadata Schemes for Research Data Repositories. / de Vries, Jerry; Tykhonov, Vyacheslav; Scharnhorst, Andrea; Admiraal, Femmy; Indarto, Eko; Priddy, Mike. 2021. Abstract from CLARIN Annual Conference 2021. https://www.clarin.eu/content/programme-clarin-annual-conference-2021
- 22. Questions? Slava Tykhonov <vyacheslav.tykhonov@dans.knaw.nl> Andrea Scharnhorst <andrea.scharnhorst@dans.knaw.nl>