Data Models

Overview

A data model is a collection of conceptual tools for describing data, data relationships, data semantics, and consistency constraints.

Federation

Generally speaking, a federation refers to some collection within which each member has some degree of internal autonomy. In computing, it often refers to some aggregated view over individual resources. Some examples include:

• Data. Federated data typically refers to grouping of data from different sources into a single view.
• Databases. A federated database is one that maps multiple autonomous databases into a single view.
• Networking. A federation in this context might mean the inter-operation of distinct networks.