Using the uni-level description (ULD) to support data-model interoperability

We describe a framework called the Uni-Level Description (ULD) for accurately representing information from a broad range of data models. The ULD extends previous metadata-model approaches by: (a) providing uniform representation and access to data model, schema, and data, and (b) supporting data models with non-traditional schema arrangements, including those that allow optional and multiple levels of schema. Because the ULD is a flat, first-order representation, we show how Datalog over the ULD can provide a flexible mechanism to query, extract, and transform information from data sources that exhibit various types of structural heterogeneity. Key words: Data Models, Information Integration, Meta Models, Schema Constraints, Conceptual Modeling

• Type: Journal
• Year: 2006
• Where: DKE
• Authors: Shawn Bowers, Lois M. L. Delcambre
• Keywords: Data Models, DKE 2006, Non-traditional Schema Arrangements, Uni-Level Description