Learn More
Hundreds of public SPARQL endpoints have been deployed on the Web, forming a novel decentralised infrastructure for querying billions of structured facts from a variety of sources on a plethora of topics. But is this infrastructure mature enough to support applications? For 427 public SPARQL endpoints registered on the DataHub, we conduct various(More)
There has been a recent, tangible growth in RDF published on the Web in accordance with the Linked Data principles and best practices, the result of which has been dubbed the " Web of Data ". Linked Data guidelines are designed to facilitate ad hoc re-use and integration of conformant structured data—across the Web—by consumer applications; however, thus(More)
BACKGROUND Several query federation engines have been proposed for accessing public Linked Open Data sources. However, in many domains, resources are sensitive and access to these resources is tightly controlled by stakeholders; consequently, privacy is a major concern when federating queries over such datasets. In the Healthcare and Life Sciences (HCLS)(More)
Existential blank nodes greatly complicate a number of fundamental operations on Resource Description Framework (RDF) graphs. In particular, the problems of determining if two RDF graphs have the same structure modulo blank node labels (i.e., if they are <i>isomorphic</i>), or determining if two RDF graphs have the same meaning under simple semantics (i.e.,(More)
The 10 th Linked Data on the Web workshop (LDOW2017) 1 was held in Perth, Western Australia on April 3 rd , 2017, co-located with the 26th International World Wide Web Conference (WWW2017). In its 10 th anniversary edition, the LDOW workshop aims to stimulate discussion and further research into the challenges of publishing, consuming, and integrating(More)
There are hundreds of SPARQL endpoints on the Web, but finding an endpoint relevant to a client's needs is difficult: each endpoint acts like a black box, often without a description of its content. Herein we briefly describe Sportal: a system that collects meta-data about the content of endpoints and collects them into a central catalogue over which(More)
Linked Data rarely takes into account multimedia content, which forms a central part of the Web. To explore the combination of Linked Data and multimedia, we are developing IMGpedia: we compute content-based descriptors for images used in Wikipedia articles and subsequently propose to link these descriptions with legacy encyclopaedic knowledge-bases such as(More)