Schema Evolution publication categorizer

We review the use on ontologies for the integration
of heterogeneous information sources. Based
on an in-depth evaluation of existing approaches to
this problem we discuss how ontologies are used to
support the integration task. We evaluate and compare
the languages used to represent the ontologies
and the use of mappings between ontologies as well
as to connect ontologies with information sources.
We also ask for ontology engineering methods and
tools used to develop ontologies for information integration.
Based on the results of our analysis we
summarize the state of the art in ontology-based information
integration and name areas of further research
activities.