Author’s Note: Last week's column discussed how an operational data store (ODS) can address real-world needs for information integration. This column further defines the ODS and examines its role as an infrastructure for e- Business integration.

An ODS is typically deployed as a mid-tier database placed between applications and databases of record. It may be configured for temporary caching or persistent storage. An ODS is an assembly point for diverse data in that it pulls data from databases of record and transforms it into structures that applications can read. In some cases, applications can write data to an ODS which, in turn, writes back to the databases of record. In these cases, the ODS may serve as a hub for application integration via database mechanisms like triggers.

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