A translation approach to portable ontology specifications
Knowledge Acquisition - Special issue: Current issues in knowledge modeling
A visual retrieval environment for hypermedia information systems
ACM Transactions on Information Systems (TOIS)
Knowledge engineering: principles and methods
Data & Knowledge Engineering - Special jubilee issue: DKE 25
OntoWeb - A Semantic Web Community Portal
PAKM '02 Proceedings of the 4th International Conference on Practical Aspects of Knowledge Management
The Design of the POSTGRES Storage System
VLDB '87 Proceedings of the 13th International Conference on Very Large Data Bases
Three Implementations of SquishQL, a Simple RDF Query Language
ISWC '02 Proceedings of the First International Semantic Web Conference on The Semantic Web
TRIPLE - A Query, Inference, and Transformation Language for the Semantic Web
ISWC '02 Proceedings of the First International Semantic Web Conference on The Semantic Web
GeoCosm: A Semantics-Based Approach for Information Integration of Geospatial Data
Revised Papers from the HUMACS, DASWIS, ECOMO, and DAMA on ER 2001 Workshops
Querying the Semantic Web with RQL
Computer Networks: The International Journal of Computer and Telecommunications Networking - Special issue: The Semantic Web: an evolution for a revolution
Toward High-Precision Service Retrieval
IEEE Internet Computing
Grid metadata catalog service-based OGC web registry service
Proceedings of the 12th annual ACM international workshop on Geographic information systems
Online curriculum on the semantic Web: the CSD-UoC portal for peer-to-peer e-learning
WWW '05 Proceedings of the 14th international conference on World Wide Web
A web query system for heterogeneous government data
dg.o '04 Proceedings of the 2004 annual national conference on Digital government research
Bringing Relational Data into the SemanticWeb using SPARQL and Relational.OWL
ICDEW '06 Proceedings of the 22nd International Conference on Data Engineering Workshops
Semantic web for geospatial e-government portals
dg.o '07 Proceedings of the 8th annual international conference on Digital government research: bridging disciplines & domains
Ontology matching for spatial data retrieval from internet portals
GeoS'05 Proceedings of the First international conference on GeoSpatial Semantics
On the (limited) difference between feature and geometric semantic similarity models
GeoS'11 Proceedings of the 4th international conference on GeoSpatial semantics
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As the demand for geospatial data increases, the lack of efficient ways to find suitable information becomes critical. In this paper, a new methodology for knowledge discovery in geographic portals is presented. Based on the Semantic Web, our approach exploits the Resource Description Framework (RDF) in order to describe the geoportal's information with ontology-based metadata. When users traverse from page to page in the portal, they take advantage of the metadata infrastructure to navigate easily through data of interest. New metadata descriptions are published in the geoportal according to the RDF schemas.