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82 Result(s)
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Book and Living Reference Work (Continuously updated edition)
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Open Access This content is freely available online to anyone, anywhere at any time.
Article
Graph-Based RDF Data Management
The increasing size of RDF data requires efficient systems to store and query them. There have been efforts to map RDF data to a relational representation, and a number of systems exist that follow this approa...
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Article
A survey of RDF data management systems
RDF is increasingly being used to encode data for the semantic web and data exchange. There have been a large number of works that address RDF data management following different approaches. In this paper we p...
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Article
Processing SPARQL queries over distributed RDF graphs
We propose techniques for processing SPARQL queries over a large RDF graph in a distributed environment. We adopt a “partial evaluation and assembly” framework. Answering a SPARQL query Q is equivalent to finding...
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Living Reference Work Entry In depth
Client-Server Architecture
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Chapter and Conference Paper
Walking Without a Map: Ranking-Based Traversal for Querying Linked Data
The traversal-based approach to execute queries over Linked Data on the WWW fetches data by traversing data links and, thus, is able to make use of up-to-date data from initially unknown data sources. While th...
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Article
gStore: a graph-based SPARQL query engine
We address efficient processing of SPARQL queries over RDF datasets. The proposed techniques, incorporated into the gStore system, handle, in a uniform and scalable manner, SPARQL queries with wildcards and ag...
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Chapter and Conference Paper
Diversified Stress Testing of RDF Data Management Systems
The Resource Description Framework (RDF) is a standard for conceptually describing data on the Web, and SPARQL is the query language for RDF. As RDF data continue to be published across heterogeneous domains a...
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Chapter and Conference Paper
WGB: Towards a Universal Graph Benchmark
Graph data are of growing importance in many recent applications. There are many systems proposed in the last decade for graph processing and analysis. Unfortunately, with the exception of RDF stores, every sy...
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Article
Answering pattern match queries in large graph databases via graph embedding
The growing popularity of graph databases has generated interesting data management problems, such as subgraph search, shortest path query, reachability verification, and pattern matching. Among these, a patte...
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Article
Maximizing bichromatic reverse nearest neighbor for L p -norm in two- and three-dimensional spaces
Bichromatic reverse nearest neighbor (BRNN) has been extensively studied in spatial database literature. In this paper, we study a related problem called MaxBRNN: find an optimal region that maximizes the size...
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Article
Scaling XML query processing: distribution, localization and pruning
Distributing data collections by fragmenting them is an effective way of improving the scalability of a database system. While the distribution of relational data is well understood, the unique characteristics...
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Book
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Chapter
Web Data Management
TheWorldWideWeb (“WWW” or “web” for short) has become a major repository of data and documents. Although measurements differ and change, the web has grown at a phenomenal rate. According to two studies in 1998...
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Chapter
Peer-to-Peer Data Management
In this chapter, we discuss the data management issues in the “modern” peer-to-peer (P2P) data management systems. We intentionally use the phrase “modern” to differentiate these from the early P2P systems tha...
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Chapter
Current Issues: Streaming Data and Cloud Computing
In this chapter we discuss two topics that are of growing importance in database management. The topics are data stream management (Section 18.1) and cloud data management (Section 18.2). Both of these topics ...
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Chapter
Background
As indicated in the previous chapter, there are two technological bases for distributed database technology: database management and computer networks. In this chapter, we provide an overview of the concepts i...
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Chapter
Database Integration
In the previous chapter, we discussed top-down distributed database design, which is suitable for tightly integrated, homogeneous distributed DBMSs. In this chapter, we focus on bottom-up design that is approp...
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Chapter
Overview of Query Processing
The success of relational database technology in data processing is due, in part, to the availability of non-procedural languages (i.e., SQL), which can significantly improve application development and end-us...
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Chapter
Optimization of Distributed Queries
Chapter 7 shows how a calculus query expressed on global relations can be mapped into a query on relation fragments by decomposition and data localization. This mapping uses the global and fragment schemas. Du...
