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The problem of incomplete data in SPARQL
(Universidad de Chile, 2020)
La información incompleta es uno de los mayores desafíos para la gestión de datos en la Web. Los datos en son incompletos en la Web por varias razones: porque hay datos que se desconocen, porque es ocultada por privacidad, ...
Transformación de lenguaje natural en Sparql para consultas de tipo Factoid
(Universidad Nacional de San Agustín de Arequipa, 2017)
Durante los últimos años, grandes empresas de internet y equipos moviles han invertido en mejorar la interaccion hombre-computador a través de una interfaz en lenguaje natural. A estos dispositivos llamaremos AVI ...
Transformación de lenguaje natural en Sparql para consultas de tipo Factoid
(Universidad Nacional de San Agustín de Arequipa, 2017)
Query Migration from Object Oriented World to Semantic World
— In the last decades, object-oriented approach was
able to take a large share of databases market aiming to design
and implement structured and reusable software through the
composition of independent elements in order ...
Canonicalisation of SPARQL Queries
(Universidad de Chile, 2018)
SPARQL es el lenguaje de consulta estándar para RDF, definido por el World Wide Web Consortium. Presentemente, hay una gran cantidad de servicios de consulta de SPARQL en la Web. También hay una gran demanda por estos ...
Semantics and Complexity of SPARQL
(ASSOC COMPUTING MACHINERY, 2009-08)
SPARQL is the W3C candidate recommendation query lan-
guage for RDF. In this paper we address systematically the formal study
of SPARQL, concentrating in its graph pattern facility. We consider for
this study simple RDF ...
Certain answers for SPARQL with blank nodes
(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 ...
Canonicalisation of monotone SPARQL queries
(Springer Verlag, 2018)
Caching in the context of expressive query languages such as SPARQL is complicated by the difficulty of detecting equivalent queries: deciding if two conjunctive queries are equivalent is NP-complete, where adding further ...
Counting Beyond a Yottabyte, or how SPARQL 1.1 Property Paths will Prevent Adoption of the Standard
(2012-04)
SPARQL –the standard query language for querying RDF– provides
only limited navigational functionalities, although these features
are of fundamental importance for graph data formats such as
RDF. This has led the W3C ...