• Publications
  • Influence
An empirical survey of Linked Data conformance
A list of fourteen concrete guidelines as given in the ''How to Publish Linked Data on the Web'' tutorial is compiled, and conformance of current RDF data providers with respect to these guidelines is evaluated. Expand
Searching and browsing Linked Data with SWSE: The Semantic Web Search Engine
The current SWSE system is described, initially detailing the architecture and later elaborating upon the function, design, implementation and performance of each individual component, to give an insight into how current Semantic Web standards can be tailored, in a best-effort manner, for use on Web data. Expand
YARS2: A Federated Repository for Querying Graph Structured Data from the Web
We present the architecture of an end-to-end semantic search engine that uses a graph data model to enable interactive query answering over structured and interlinked data collected from manyExpand
Weaving the Pedantic Web
This paper discusses common errors in RDF publishing, their consequences for applications, along with possible publisher-oriented approaches to improve the quality of structured, machine-readable and open data on the Web. Expand
Observing Linked Data Dynamics
The design and first results of the Dynamic Linked Data Observatory are presented, a long-term experiment to monitor the two-hop neighbourhood of a core set of eighty thousand diverse Linked data documents on a weekly basis, and the dynamics of the monitored documents over the data collected thus far are analysed. Expand
Foundations of Modern Query Languages for Graph Databases
The importance of formalisation for graph query languages is discussed, with a summary of what is known about SPARQL, Cypher, and Gremlin in terms of expressivity and complexity; and an outline of possible future directions for the area. Expand
SPARQL Web-Querying Infrastructure: Ready for Action?
It is found that only one-third of endpoints make descriptive meta-data available, making it difficult to locate or learn about their content and capabilities, and patchy support for established SParQL features like ORDER BY as well as for new SPARQL 1.1 features is found. Expand
ReConRank: A Scalable Ranking Method for Semantic Web Data with Context
We present an approach that adapts the well-known PageRank/HITS algorithms to Semantic Web data. Our method combines ranks from the RDF graph with ranks from the context graph, i.e. data sources andExpand
Scalable and distributed methods for entity matching, consolidation and disambiguation over linked data corpora
Evaluation over a diverse Linked Data corpus consisting of 1.118 billion quadruples derived from a domain-agnostic, open crawl of 3.985 million RDF/XML Web documents is offered, demonstrating the feasibility of the methods at that scale, and giving insights into the quality of the results for real-world data. Expand
SPARQLES: Monitoring public SPARQL endpoints
Fujitsu Laboratories Limited’s CONICYT/FONDECYT Project and the Millennium Nucleus Center for Semantic Web Research aim to provide real-time information about the “building blocks of knowledge” for semantic web research. Expand