Abstrakt
This paper describes an approach for mediation of heterogeneous XML schemas. An XML mediation layer is introduced to manage: (1) establishing appropriate mappings between the global schema and the schemas of the sources; (2) querying XML data sources in terms of the global schema.
The former task is performed through a semi-automatic process that generates local and global paths. An XML Query Translator for the latter task is described to translate a global user query into local queries by using the mappings among the schemas.