Linked Data for science and education

Sharing of resources, resource metadata, and data across the Web is a central principle in scientific and educational contexts. Scientific collaboration has long been striving for wider reuse and sharing of knowledge and data. Likewise, the Open Educational Resources community has promoted the widespread exploitation of public and reusable educational resources throughout the last decade. Hence, technologies to enable interoperability of shared resources and data have long been at the centre of scientific and educational information systems. However, due to the lack of a shared technology stack and joint principles, the landscape of developed and utilised standards is very fragmented and covers an increasing variety of heterogeneous technologies, such as repositories with proprietary interfaces and query mechanisms. Moreover, a broad range of largely incompatible metadata schemas and taxonomies have been developed to describe and expose educational resources, and scientific workflows and data. Due to the prevailing heterogeneity of deployed approaches and technologies, interoperability remains an open challenge. At the same time, the Linked Data (LD) approach has emerged as the most recent evolution of the Semantic Web, aiming at Web-scale data interoperability, it has produced an ever growing amount of data sets and schemas available on the Web. Given the proven capabilities of LD technologies towards realising Web scale data sharing and reuse, scientific and educational practitioners have started to adopt those principles. Results of such activities cover joint schemas used for describing scientific or educational resources, vast collections of structured data about, for instance, cultural or historic artifacts, bibliographic collections, domainspecific vocabularies capturing extensive amounts of scientific domain knowledge – where the life sciences are particularly well represented – as well as baseline technologies used to expose and integrate linked datasets. This special issue contains four papers documenting the most recent developments in Linked Data for Science and Education. Focusing on the collection and annotation of scientific data, the paper Ontology of Units of Measure and Related Concepts by Hajo Rijgersberg, Mark van Assem and Jan Top shows how to annotate quantitative research data for sharing and reuse. The design choices made during the development of this OWL ontology are explained, and the application of the ontology is demonstrated with different use cases and the tools and web services built to handle them. The paper Publishing Bibliographic Data on the Semantic Web using BibBase by Reynold S. Xin, Oktie Hassanzadeh, Christian Fritz, Shirin Sohrabi and Renée J. Miller addresses the next step in the research process, namely publishing the results and handling the publication metadata. BibBase is a system that automatically creates a number of services from standard BibTex files, providing the contents as rich Linked Data queryable through a SPARQL endpoint, as RSS feeds, and as HTML snippets, thus addressing a number of use cases for sharing and dissemination of publication metadata. While the first two papers focus on the dissemination of scientific assets, the remaining two papers ad-