RDF vocabularies and application profiles
From Linked Data to Networked Knowledge
This lecture briefly covers the history of human communication up to the present day and then seeks to answer the question, "How best can we [...]
IRIS RDFS Reasoner
The RDFS Reasoner is a framework that enables reasoning over RDF Schema ontologies and that uses IRIS as underlying reasoning engine. The RDFS Reasoner implementation [...]
RDF and Logic: Reasoning and Extension
This paper explores embedding the various kinds of RDF entailment in F-Logic. It shows that the embedding of simple, RDF, and RDFS entailment, as well [...]
Answering Queries Over OWL Ontologies with SPARQL
This slide presentation discusses the various types of RDF Schema and OWL entailment regimes defined by SPARQL 1.1. It highlights where limitations and restrictions exist [...]
Expressive Languages for Querying the Semantic Web
SPARQL 1.1 was recently released, which includes entailment regimes for RDFS and OWL vocabularies and a mechanism to express navigation patterns through regular expressions. Unfortunately, [...]
Discovering Missing Semantic Relations Between Entities in Wikipedia
Wikipedia’s infoboxes contain rich structured information of various entities, which have been exploited by the DBpedia project to generate large-scale Linked Data datasets. Among all [...]
Learning from the Masters: Understanding Ontologies found on the Web (Part 1)
The purpose of this presentation was to help conference attendees gain sufficient experience of working with OWL and tools (e.g., the Swoop ontology editor/browser) to [...]
Suggesting Mappings from Relational Databases to Ontologies
This video discusses the CONTOMAP project, which seeks to solve the problem of mapping from relational databases to ontologies. Several possible approaches are outlined: naive, [...]
Providing Linked Data
This video presentation covers the whole spectrum of Linked Data production and exposure. It begins with a grounding in Linked Data principles and best practices, [...]
Schema-Agnostic Query Rewriting in SPARQL 1.1
SPARQL 1.1 supports the use of ontologies to enrich query results with logical entailments, and OWL 2 provides a dedicated fragment OWL QL for this [...]