Towards Virtual Knowledge Graphs over Web APIs
Francesco Corcoglioniti, Researcher @ University of Bozen-Bolzano
Knowledge Graphs (KGs) are an emerging, highly flexible and Web-friendly technology for integrating, representing, and querying semi-structured data in a semantically rich model formalized by an Ontology. KGs may be built using specialized data management software (e.g., triplestores) or, by leveraging suitable mappings and query rewriting techniques, as “Virtual Knowledge Graph” (VKG) views over some legacy data source, such as a relational database. In this talk, we provide background information on VKGs and their underlying technologies, with particular emphasis on the open-source Ontop VKG engine, and we discuss ongoing research and development efforts towards their extension to Web APIs as a non-relational data source of practical relevance. This extension, supported by the HIVE and OntoCRM projects, would also enable transparent access to both static relational data and dynamically-computed Web API data as part of a regular VKG query.
Slides