Tag Archives: Ontologies

Incremental development of a shared urban ontology: the Urbamet experience

Thesauri are used for document referencing. They define hierarchies of domains. We show how document and domain contents can be used to validate and update a classification based on a thesaurus. We use document indexing and classification techniques to automate these operations. We also draft a methodology to systematically address those issues. Our techniques are applied to Urbamet, a thesaurus in the field of town planning.

Article originally published in ‘Tcon – Journal of Information Technology in Construction’ V. 15(2010), Special Issue: Bringing urban ontologies into practice, pp. 132-139. ©The authors. Distributed under the Creative Commons Attribution Licence 3.0 unported.

View full Article in PDF

Ontology-based approaches for improving the interoperability between 3D urban models

3D geodata are more and more available as well as realtime visualization possibilities with free three-dimensional viewers such as Google Earth. This implies a growing demand of 3D city models, which are 3D representations at the scale of the city. Despite their intended wide range of applications, such models cannot be used for many urban tasks as they cannot represent the urban information associated with these tasks. On the contrary, ontologies have proven their capacity and usability in the representation of information and knowledge of various domains. Besides, interoperability is a crucial problem for urban information systems. Transferring information between different systems or models requires the ability to set up correspondences between concepts from one system to concepts in the other one. The use of ontologies can greatly facilitate this mechanism of concept matching. In this paper we will present, on the basis of case studies, how ontologies can overstep the semantic limitation of 3D city models and how ontology-based approaches can be used to interconnect urban models in order to improve their interoperability.

Article originally published in ‘Tcon – Journal of Information Technology in Construction’, V. 15(2010), Special Issue: Bringing urban ontologies into practice, pp. 169-184. ©The authors. Distributed under the Creative Commons Attribution Licence 3.0 unported.

View full Article in PDF

Applications of semantic web technology to support learning content development

The Semantic Web is based on ontology technology – a knowledge representation framework – at its core to make meaning explicit and more accessible to automatic processing. We discuss the potential of this technology for the development of content for learning technology systems. We survey seven application types demonstrating different forms of applications of ontologies and the Semantic Web in the development of learning technology systems. Ontology technologies can assist developers, instructors, and learners to organise, personalise, and publish learning content and to discover, generate, and compose learning content. A conceptual content development and deployment architecture allows us to distinguish and locate the different applications and to discuss and assess the potential of the underlying technologies.

Article originally published in ‘Interdisciplinary Journal of E-Learning and Learning Objects’, V.5 (2009), http://ijklo.org/.

Reprinted with permission

View full Article in PDF