Unit:
Κατεύθυνση Διαχείριση Δεδομένων, Πληροφορίας και ΓνώσηςΠληροφορική
Supervisors info:
Εμμανουήλ Κουμπαράκης, Καθηγητής, Τμήμα Πληροφορικής και Τηλεπικοινωνιών, ΕΚΠΑ
Original Title:
The semantic data cube system Plato and its cache optimization
Translated title:
The semantic data cube system Plato and its cache optimization
Summary:
The DeepCube project provides us with multiple datasets, in the form of data cubes. We can access this data as a foreign table in PostgreSQL, through the development and use of a Multicorn Foreign Data Wrapper. Furthermore, we can use Ontop to query the database as a virtual RDF Graph, using SPARQL. The entire pipeline is implemented through the semantic data cube system Plato. However, the querying process lacks in efficiency and thus, we extend the Ontop plugin by implementing a cache system with a corresponding table in PostgreSQL, for faster access to the requested data. This way a certain portion of the dataset will always be materialized in the database, constantly updating based on user queries.
Main subject category:
Technology - Computer science
Keywords:
RDF, OBDA, Database Management, Geospatial Data
