Defining a common language is a crucial step for sharing or combining data. Vocabularies, taxonomies, ontologies are are tools to reach this goal.
Work on this concept is done in the following link:
Define what an ontology is. Identify differences among ontologies, Thesauri, and taxonomies
Differentiate between upper, domain, and application level ontologies
Identify issues in the development of geospatial ontologies. Criticise the role of ontology development methodologies and ontology evaluation in the development of ontologies
Define and exemplify the reuse of ontologies - Define and identify the role of ontology patterns
In progress (GI-N2K)