Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Matthew Damigos"'
Publikováno v:
Information Systems. 115:102194
As RDF becomes more widely established and the amount of linked data is rapidly increasing, the efficient querying of large amount of data becomes a significant challenge. In this paper, we propose a family of algorithms for querying large amount of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ddb73bdb917bd3df27ab95e18a5514a
https://doi.org/10.1016/j.is.2023.102194
https://doi.org/10.1016/j.is.2023.102194
Autor:
Eleftherios Kalogeros, Matthew Damigos, Michalis Sfakakis, Sofia Zapounidou, Aggeliki Drakopoulou, Costas Zervopoulos, Gerasimos Martinis, Christos Papatheodorou, Manolis Gergatsoulis
Publikováno v:
Metadata and Semantic Research ISBN: 9783030988753
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08d47872e14eee23b1c18511320cc7b2
https://doi.org/10.1007/978-3-030-98876-0_32
https://doi.org/10.1007/978-3-030-98876-0_32
Publikováno v:
IDEAS
In this paper we investigate within-record referential constraints on tree-structured data. We consider an SQL-like query language such that the one used in Dremel and we call it tree-SQL. We show how to define and process a query in tree-SQL in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a8edb1cb78b0bb87e34f60fc8657ef5
https://doi.org/10.1145/3472163.3472184
https://doi.org/10.1145/3472163.3472184
Autor:
Matthew Damigos, Foto N. Afrati
Publikováno v:
Lecture Notes in Computer Science ISBN: 9783030864712
DEXA (1)
DEXA (1)
In this paper, we consider a tree-structured data model used in many commercial databases like Dremel, F1, JSON stores. We define identity and referential constraints within each tree-structured record. The query language is a variant of SQL and flat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4aea233c40306ee37f716d603f16939
https://doi.org/10.1007/978-3-030-86472-9_26
https://doi.org/10.1007/978-3-030-86472-9_26
Publikováno v:
Metadata and Semantic Research ISBN: 9783030144005
MTSR
MTSR
In this paper, we investigate the problem of efficiently evaluating SPARQL queries, over large amount of linked data utilizing distributed NoSQL system. We propose an efficient approach for partitioning large linked data graphs using distributed fram
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c17e5ab3be9990c033520e32e4a89b43
https://doi.org/10.1007/978-3-030-14401-2_2
https://doi.org/10.1007/978-3-030-14401-2_2
Publikováno v:
International Journal of Metadata, Semantics and Ontologies. 14:63
In this paper, we investigate the problem of efficiently evaluating (Basic Graph Pattern) BGP SPARQL queries over a large amount of RDF data. We propose an effective data model for storing RDF data in a document database using maximum replication fac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2562bfd154954246d7924b09110acadc
https://doi.org/10.1504/ijmso.2020.107798
https://doi.org/10.1504/ijmso.2020.107798
Publikováno v:
Information Systems. 42:153-176
In this paper, we investigate the problem of view selection for workloads of conjunctive queries under bag and bag-set semantics. In particular, for both semantics we aim to limit the search space of candidate viewsets. We also start delineating boun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0bbd09aab58e28fc0ff12467674553c
https://doi.org/10.1016/j.is.2014.01.002
https://doi.org/10.1016/j.is.2014.01.002
Publikováno v:
FiCloud
The problem of efficient querying large amount of linked data using Map-Reduce is investigated in this paper. The proposed approach is based on the following assumptions: a) Data graphs are arbitrarily partitioned in the distributed file system is su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aaa3299642dd97313e2f9dd0f4e29de6
https://doi.org/10.1109/ficloud.2015.36
https://doi.org/10.1109/ficloud.2015.36
Publikováno v:
Panhellenic Conference on Informatics
XML is a widespread, text-based format used for exchanging information on the Web and representing metadata. Since the amount of XML information is rapidly increasing, efficient querying of large data repositories, containing XML data, is a significa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21e2acf8ac8a926c5a7f8c73785fbaa6
https://doi.org/10.1145/2645791.2645804
https://doi.org/10.1145/2645791.2645804