Abstract
Nowadays scientific data should be FAIR that are Findable, Accessible, Interoperable and Reusable. Reference implementation of FAIR data management principles proposed recently considers RDF as unifying data model and RDF Mapping Language (RML) as the basic language for data integration. This paper is aimed at development of methods and tools for scalable data integration in the frame of this architecture. A mapping from RML into a high-level data analysis language Pig Latin that runs on Hadoop is considered. The mapping is implemented using model transformation technologies. These allows to execute RML programs in the Hadoop distributed computing environment. According to the experimental evaluation RML implementation developed scales w.r.t. data volume and outperforms related implementations.
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Among data retrieval features described in RML documentation JSON, CSV and XML data files from HDFS, RDF data from SPARQL endpoints, relational data from several DBMSs are supported. CSVW (CSV on the Web Vocabulary) and D2RQ Mapping Language are only partially supported. DCAT (Data Catalog Vocabulary) and Hydra core vocabulary for Web API description are not supported.
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Acknowledgement
The research is financially supported by Russian Foundation for Basic Research, projects 18-07-01434, 18-29-22096. The research was carried out using infrastructure of shared research facilities CKP “Informatics” (http://www.frccsc.ru/ckp) of FRC CSC RAS.
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Tang, W., Stupnikov, S. (2021). A Transformation of the RDF Mapping Language into a High-Level Data Analysis Language for Execution in a Distributed Computing Environment. In: Sychev, A., Makhortov, S., Thalheim, B. (eds) Data Analytics and Management in Data Intensive Domains. DAMDID/RCDL 2020. Communications in Computer and Information Science, vol 1427. Springer, Cham. https://doi.org/10.1007/978-3-030-81200-3_6
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