We combine the description logic ALC with the metric logics defined Entities that are conceived of as abstract points in the realm of ALC are given a spatial extension via an `ext...
Current methods that interactively render reasonably complex CSG objects are image based and are severely bandwidth limited. This paper presents a new approach to raytracing CSG o...
Fabiano Romeiro, Luiz Velho, Luiz Henrique de Figu...
Space and time have not received much attention on the Semantic Web so far. While their importance has been recognized recently, existing work reduces them to simple latitude-longi...
In description logics (DLs), concrete domains are used for defining concepts based on concrete qualities of their instances such as the weight, age, duration, and spatial extensio...
A digital library typically includes a set of keywords (or subject terms) for each document in its collection(s). For some applications, including natural resource management, geog...
Mathew Weaver, Lois M. L. Delcambre, Leonard D. Sh...