This article is concerned with how people process text in the presence or absence of a relevant schema. In particular, we focus on the effects of schema availability and concept repetition on both on-line integration and memory for text. Subjects were required to read "vague" texts (like Bransford and Johnson's, 1972, well-known "washing clothes" story) and their reading time for each sentence ...

Data exchange between enterprise resource planning (ERP) systems in a supply chain system needs to fulfill requirements of both schema integration and message translation. Since ERP systems with relational database systems are developed independently, schema conflicts between databases is a common problem for schema integration. Thus, supply chain partners need to preserve the data integrity of...

Proc. 18 International Conference on Conceptual Modeling (ER'99, Paris, Nov.'99), LNCS, Springer-Verlag, 1999. Federated database systems provide a homogeneous interface to possibly heterogeneous local database systems. This homogeneous interface consists of a global schema which is the result of a logical integration of the schemata of the corresponding local database systems and le systems. I...

The CORDS Multidatabase System (MDBS) provides applications with an integrated view of a collection of distributed heterogeneous data sources. Applications are presented with a relational view of the available data and are able to access the data using standard SQL operations. An application's view of the data is defined by a process called schema integration. This paper describes the schema in...

We propose a flexible framework called MOMA for mapping-based object Object matching or object consolidation is a crucial task for data integration and 370, COMA A System for Flexible Combination of Schema Matching Approaches. Schema matching and mapping are an important tasks for many applications, such as data integration, data warehousing and e-commerce. First and foremost our approach is ba...

This paper describes view generation and view optimisation in the AutoMed heterogeneous data integration framework. In AutoMed, schema integration is based on the use of reversible schema transformation sequences. We show how views can be generated from such sequences, for global-as-view (GAV), local-as-view (LAV) and GLAV query processing. We also present techniques for optimising these genera...

The negotiation process is often referred to in the literature on federated databases, but is seldom covered in depth. This process is essential to determine data of the component schema to be integrated for building a federated schema and the access permissions to be granted. This paper presents our negotiation process approach which is incorporated in the integration schemas mechanism, so we ...

We propose to enhance a schema integration process with a validation phase employing logic-based data models. In our methodology, we validate the source schemas against the data model; the inter-schema mappings are validated against the semantics of the data model and the syntax of the correspondence language. In this paper, we focus on how to employ a reasoning engine to validate spatio-tempor...

Mapping specification has been recognised as a critical bottleneck to the large scale deployment of data integration systems. A mapping is a description using which data structured under one schema are transformed into data structured under a different schema, and is central to data integration and data exchange systems. In this paper, we argue that the classical approach of correspondence iden...

The work “Data Integration under Integrity Constraints”, published at the CAiSE 2002 Conference, proposes a rewriting technique for answering queries in data integration systems, in the case where the global schema contains the classical key and foreign key constraints, and the mapping between the data sources and the global schema is of the global-as-view type. In this addendum, we explain why...