The original SPARQL proposal was often criticized for its inability to navigate through the structure of RDF documents. For this reason property paths were introduced in SPARQL 1.1, but up to date there are no theoretical studies examining how their addition to the language affects main computational tasks such as query evaluation, query containment, and query subsumption. In this paper we tack...

Matchmaking between offers and requests is an essential mechanism in electronic market places. Description Logics have been proposed as a appropriate framework for representing offers and requests and standard methods from description logics reasoning have been proposed for computing matches. We argue that classical reasoning is not well suited for realistic scenarios as it does not allow to co...

We introduce a feature structure, corresponding to a timespan tree based on ‘A Generative Theory of Tonal Music’ (GTTM) for a music piece, and represent the reduction of the tree by the subsumption among these feature structures. As the collection of them forms a lattice, we can define the join and meet operations. We show a melodic morphing algorithm based on these simple operations.

The OpenEHR archetypes have been suggested as a standard for detailing data models of electronic healthcare records, as a means of achieving interoperability between clinical systems. But, mapping terms of these clinical data models to a terminology system, such as SNOMED CT, is a crucial step to provide the required interoperability. Through this study, we aim to understand better how archetyp...

10,000 words on a single picture, and a similar Japanese proverb devalues this to only 100 words. In most languages the current consensus seems to be that a picture is worth 1000 words. Whatever the true worth in words a good picture is capable of conveying (sometimes quite complex) meaning clearly and without the need for language. Show a picture of an elephant to speakers of two different lan...