Abstract
Semantics.gr is an innovative, cutting-edge platform developed by the National Documentation Centre (EKT) for the creation, curation, interlinking and publishing of vocabularies, thesauri, classifications and authority files (collectively referred to as Vocabularies in this paper) as Linked Open DataQuery.
Besides SKOS, Semantics.gr can accommodate vocabularies of any data model that can be expressed as an OWL ontology. Through a user-friendly GUI, a user can represent a particular data model (i.e. SKOS or MADS/RDF) by configuring the relevant OWL classes and properties and setting appropriate constraints as a Vocabulary Schema. The Vocabulary Schema, in turn, provides the blueprint for the term forms through which a user adds or updates individual terms.
To date, we have represented various established data models in Semantics.gr, such as SKOS, EDM’s contextual classes, MADS/RDF (for person names and organizations) and Schema.org, creating, in parallel, several custom Vocabulary Schemas capturing specialized vocabulary needs. We have also developed several Vocabularies that we use, on one hand, as controlled vocabulary lists in our digital repositories as well as to enrich 3rd party data in the national cultural aggregator, SearchCulture.gr, and the scientific data aggregator, OpenArchives.gr. Vocabularies are published as RDF and also via a Web API under an open license and are, therefore, free for any entity to reuse for their purposes in their own systems. Semantics.gr is launching as a free service to organizations that wish to create and publish their vocabularies as LOD, with the intention to become a central public platform for publishing and re-using authoritative LOD Vocabularies and to develop an active community around the service.
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Notes
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OpenArchives Data Model (OADM), described here (in greek): http://ariadne.ekt.gr/ariadne/handle/20.500.12776/16660.
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Catalogue for Research Infrastructure Services (Catris): https://www.portal.catris.eu/home.
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We use the word term for any entity/resource part of a vocabulary or catalogue, even for persons/legal bodies.
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OECD FORD Research and Development classification fields.
https://unstats.un.org/unsd/classifications/Family/Detail/1039.
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Acknowledgments
The work presented in this article has been partly supported by the project “National Research Information and Technology System: Digital Content Aggregation, Documentation and Dissemination Infrastructure ensuring interoperability, long-term preservation and open access” of the Operational Programme “Reform of the Public Sector” (NSFR), co-funded by Greece and the European Union.
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Georgiadis, H. et al. (2022). Publishing LOD Vocabularies in Any Schema with Semantics.gr. In: Garoufallou, E., Ovalle-Perandones, MA., Vlachidis, A. (eds) Metadata and Semantic Research. MTSR 2021. Communications in Computer and Information Science, vol 1537. Springer, Cham. https://doi.org/10.1007/978-3-030-98876-0_25
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