Topology Labeling: An Indexing Structure to Find Complex Relationships within Ontologies

Semantic Web technologies have contributed mainly to organize the knowledge and to search about this organized knowledge. One of the most important and complex kinds of search is to know if two entities are related within an ontology. These are called Semantic Associations, which have been classified using ρ operators: ρ-path, ρ-join and ρ-iso. Then, a ρ-query will solve any of them.