SOWL: a framework for handling spatio-temporal information in OWL 2.0
RuleML'2011 Proceedings of the 5th international conference on Rule-based reasoning, programming, and applications
Temporal reasoning for supporting temporal queries in OWL 2.0
KES'11 Proceedings of the 15th international conference on Knowledge-based and intelligent information and engineering systems - Volume Part I
Can OWL and logic programming live together happily ever after?
ISWC'06 Proceedings of the 5th international conference on The Semantic Web
Qualitative Spatial Reasoning Using Topological and Directional Information in OWL
ICTAI '12 Proceedings of the 2012 IEEE 24th International Conference on Tools with Artificial Intelligence - Volume 01
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Representation of spatial information for the Semantic Web often involves qualitative defined information (i.e., information described using natural language terms such as "North"), since precise arithmetic descriptions using coordinates and angles are not always available. A basic aspect of spatial information is directional relations, thus embedding directional spatial relations into ontologies along with their semantics and reasoning rules is an important practical issue. This work proposes a new representation for directional spatial information in ontologies by means of OWL properties and reasoning rules in SWRL embedded into the ontology. The proposed representation is based on the decomposition of cone shaped directional relations (CSD-9) offering a more compact representation and improved reasoning performance over existing approaches. A 3D representation is proposed as well and both 2D and 3D representations and reasoning are evaluated.