Browsing by Author "Hernández, Daniel"

Now showing items 1-2 of 2

    • Certain answers for SPARQL with blank nodes 
      Hernández, Daniel; Gutierrez, Claudio; Hogan, Aidan (Springer Verlag, 2018)
      Blank nodes in RDF graphs can be used to represent values known to exist but whose identity remains unknown. A prominent example of such usage can be found in the Wikidata dataset where, e.g., the author of Beowulf is given ...
    • Semantics for querying paths in graph databases: No-repeated-node or no-repeated-edge ? 
      Hernández, Daniel; Gutierrez, Claudio (CEUR-WS, 2017)
      Patterns for walks in graphs usually include regular expressions, that may result in loops, thus producing infinite solutions. To overcome this issue, practical query languages bound result sets to en- sure finiteness. On ...