This work presents a hybrid approach for domain ontology development, which
merges top-down and bottom-up techniques. In the top-down approach the concepts
in the ontology are derived from an analysis and study of relevant information
sources about the domain (e.g., hydrographic features). In the bottom-up approach
the concepts in the ontology are the result of applying formal methods on a analysis
of the data instances on the repositories (e.g., repositories containing hydrographical
features)
