Limits of Schema Mappings

Generic Schema Mappings

Schema mappings come in different flavors: simple correspondences are produced by schema matchers, intensional mappings are used for schema integration. However, the execution of mappings requires a formalization based on the extensional semantics of models. This problem is aggravated if multiple metamodels are involved. In this paper we present extensional mappings, that are based on second or...

On simplification of schema mappings

Article history: Received 3 October 2011 Received in revised form 3 July 2012 Accepted 16 January 2013 Available online 21 January 2013

Schema Mappings for the Web

Current solutions to data integration present many inconvenients. The bottleneck seems to be the impossible automation of the whole process. Human intervention will always be needed at some point, and the problem is to find where and how this intervention can be performed the most efficiently. In traditional mediator approaches the global schema and mappings between the global and local schemas...

View Synthesis from Schema Mappings

In data management, and in particular in data integration, data exchange, query optimization, and data privacy, the notion of view plays a central role. In several contexts, such as data integration, data mashups, and data warehousing, the need arises of designing views starting from a set of known correspondences between queries over different schemas. In this paper we deal with the issue of a...

A Schema-only Approach to Validate XML Schema Mappings