View integration is an important technique for developing software systems built upon large databases independent which paradigm is used for realizing the database. We analyzed to which extent traditional view integration methods cover all aspects of object-oriented datamodels and found, in particular, that the integration of methods is hardly supported. We present a methodology for integrating...

The language of sketches is as concise and powerful as higher order logic and as handy as conventional ER-diagrams. We discuss its beneets in respect to problems of schema integration. It is evident that a chief property of the next generation information systems is their organization on cooperative principles. Typically, applications involved in a cooperative system have to access data stored ...

A schema mapping is a specification that describes how data from a source schema is to be mapped to a target schema. Schema mappings have proved to be essential for data-interoperability tasks such as data exchange and data integration. The research on this area has mainly focused on performing these tasks. However, as Bernstein pointed out [7], many information-system problems involve not only...

of the PhD Thesis Foundations of Information Integration Analyzing, Managing and Reasoning about Schema Mappings

Schema integration, Data matching, XML schema, Heterogeneous data (20) Rahm E., Do H, Massmann S. (2004) "Matching large XML schemas", ACM. An XML schema provides standards and rules for the structure of a given XML document. Stefani_/artist_ _year_2004_/year_ _genre_pop_/genre_ _description_ This companies and market places) exchange increasingly large amounts of data. XSLT will use the match ...

One way of achieving interoperability among heterogeneous, federated DBMSs is through a multidatabase system that supports a single common data model and a single global query language on top of different types of existing systems. The global schema of a multidatabase system is the result of a schema integration of the schemas exported from the underlying databases, i.e., local databases. A glo...

MAIN TEXT A Peer Data Management System (PDMS) is a distributed data integration system providing transparent access to heterogeneous databases without resorting to a centralized logical schema. Instead of imposing a uniform query interface over a mediated schema, PDMSs let the peers define their own schemas and allow for the reformulation of queries through mappings relating pairs of schemas (...

The tutorial first addresses requirements and semantic problems to integrate digital information into large scale, meaningful networks of knowledge that support not only access to source documents but also use and reuse of integrated information. The pros and cons of developing global ontologies are discussed. It is argued that core ontologies of relationships are fundamental to schema integrat...

Web data is characterized by a great structural diversity as well as frequent changes, which poses a great challenge for web applications based on that data. We want to address this problem by developing a schema-optional and flexible data model that supports the integration of heterogenous and volatile web data. Therefore, we want to rely on graph-based models that allow to incrementally exten...

AutoMed is a data integration system which supports a hypergraph based data model the HDM as its common data model Constructs of higher level data models are de ned in terms of the HDM as are sets of primitive schema trans formations In this way collections of schemas with each schema based on one of a variety of data models can be transformed into their HDM representation and subsequently inte...