منابع مشابه
Querying Distributed RDF Data Sources with SPARQL
Integrated access to multiple distributed and autonomous RDF data sources is a key challenge for many semantic web applications. As a reaction to this challenge, SPARQL, the W3C Recommendation for an RDF query language, supports querying of multiple RDF graphs. However, the current standard does not provide transparent query federation, which makes query formulation hard and lengthy. Furthermor...
متن کاملS2RDF: RDF Querying with SPARQL on Spark
RDF has become very popular for semantic data publishing due to its flexible and universal graph-like data model. Thus, the ever-increasing size of RDF data collections raises the need for scalable distributed approaches. We endorse the usage of existing infrastructures for Big Data processing like Hadoop for this purpose. Yet, SPARQL query performance is a major challenge as Hadoop is not inte...
متن کاملC-SPARQL: a Continuous Query Language for RDF Data Streams
This article defines C-SPARQL, an extension of SPARQL whose distinguishing feature is the support of continuous queries, i.e. queries registered over RDF data streams and then continuously executed. Queries consider windows, i.e. the most recent triples of such streams, observed while data is continuously flowing. Supporting streams in RDF format guarantees interoperability and opens up importa...
متن کاملScalable SPARQL Querying of Large RDF Graphs
The generation of RDF data has accelerated to the point where many data sets need to be partitioned across multiple machines in order to achieve reasonable performance when querying the data. Although tremendous progress has been made in the Semantic Web community for achieving high performance data management on a single node, current solutions that allow the data to be partitioned across mult...
متن کاملRepresenting, Querying and Transforming Social Networks with RDF/SPARQL
As social networks are becoming ubiquitous on the Web, the Semantic Web goals indicate that it is critical to have a standard model allowing exchange, interoperability, transformation, and querying of social network data. In this paper we show that RDF/SPARQLmeet this desiderata. Building on developments of social network analysis, graph databases and Semantic Web, we present a social networks ...
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ژورنال
عنوان ژورنال: ACM SIGMOD Record
سال: 2010
ISSN: 0163-5808
DOI: 10.1145/1860702.1860705