Designing a Bilingual Eco-Ontology for Open and Intuitive Search

Lecture Notes in Geoinformation and Cartography

2007

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Abstract. Environmental databases store a wide variety of data from heterogeneous sources which are described with domain-specific terminologies and refer to distinct locations. In order to make them accessible also to non-expert users, terminological concepts and spatial relations must be represented in a way that they can be exploited for searches. In this paper we propose a hybrid knowledge representation system architecture which integrates terminological and spatial aspects of the application domain and provides support for reasoning with RCC, a well-known calculus for spatial reasoning, and the Semantic Web's ontology language OWL. Our approach is motivated by the observation that RCC cannot be expressed in OWL without a major revision of the latter. Issues of upholding consistency of the knowledge base in view of an evolving ontology and of computational complexity are discussed.

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Section: Resultsmentioning

confidence: 99%

Towards Spatial Reasoning in the Semantic Web: A Hybrid Knowledge Representation System Architecture

Lecture Notes in Geoinformation and Cartography

2007

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“…Since the soundness and completeness of reasoning services for a great variety of description logics -including OWL DL -have 2 Table 1 shows that, if P(x, y) were asserted for all pairs of regions for which this relation holds (and not C(x, y)), there would be a similar problem with verifying the existential proposition used to define O(x, y).…”

Section: Asserting the Rcc-8 Relationsmentioning

confidence: 98%

“…The regions are asserted as individuals in the ABox of our OWL DL knowledge base. The connections between them -which were identified by cartographic analysis -are asserted as role assertions of type C(x, y) for calculation with formula (1) or as role assertions in terms of the RCC-8 relations for inferences with formula (2). Overall, there are 262 relations asserted in our sample.…”

Section: Applying the Two Approachesmentioning

confidence: 98%

“…Instead the question is whether it is complete or not and how good it approximates the spatial setting (the latter will be explored in section 5.3). 2 The following formula adapts the original definition to a finite data structure:…”

Section: Representing Rcc In Owl DL 51 Asserting the Primitive Rcc Rmentioning

confidence: 99%

“…semantic) search. The semantic search is based on a bilingual ontology in OWL DL [2]. By exploiting the relationships between the building blocks of the ontology search terms are semantically expanded before querying the databases.…”

Section: Introductionmentioning

confidence: 99%

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Extending an ontology-based search with a formalism for spatial reasoning

Proceedings of the 2008 ACM Symposium on Applied Computing

Hägeli

2008

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With the objective of extending an existing ontology-based search with a formalism for spatial reasoning two approaches to a representation of the Region Connection Calculus (RCC) in OWL DL are explored. The exploration results in a representation which is minimal yet still allows inferring the relations between all connecting regions in any of the different RCC species using a sound and complete calculus. The theoretical results are demonstrated in a sample application. The scale of the representation in the sample application is discussed. While the successful approach can be applied to small applications, we conclude that further research is required before applying it to large applications.

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Semantic modeling of temporal information in a database for biotope inventories

Information Technologies in Environmental Engineering

2009