by Holger Knublauch | Jun 18, 2013 | Uncategorized
One of the best kept secrets about SPIN is its ability to define new SPARQL functions that encapsulate complex sub-queries into reusable building blocks. Normal SPIN functions are limited to whatever can be expressed in SPARQL, by means of a nested spin:body query....
by Holger Knublauch | Jun 13, 2013 | Uncategorized
Several RDF/OWL ontologies use blank node structures to represent complex objects. For example, OWL uses blank nodes to represent class expression trees consisting of intersections, unions and restrictions. Other ontologies use “reified” objects that...
by Holger Knublauch | Jun 13, 2013 | Uncategorized
SPARQL Web Pages (SWP) is a declarative language that represents user interface elements with an RDF vocabulary. It is tightly integrated into TopBraid Suite: TopBraid Composer is used for editing and the TopBraid Live server executes them for web applications. Its...
by Holger Knublauch | Jun 12, 2013 | Uncategorized
SPARQL Web Pages is a powerful framework for defining HTML renderings of RDF data. Recent releases of TopBraid have added significant improvements to this framework, including a growing library of out-of-the-box components for recurring tasks: the SWA Gadgets. SWA...
by Holger Knublauch | Jun 11, 2013 | Uncategorized
Faceted search is a user interface metaphor that is best suitable for explorative scenarios: A user starts by roughly selecting a type of objects and the user interface presents characteristics (or “facets”) of the available instances, allowing the user to...
