The ADL Registry and CORDRA document set consists of five volumes. Each covers different aspects of the Advanced Distributed Learning (ADL) Initiative Registry Project. Volume 1 is available for download now. The remaining volumes in the series will be published throughout 2009/

Volume 1: General Overview
Volume 1 is an introduction to the ADL Registry and the Content Object Repository Discovery and Registration/Resolution Architecture (CORDRA™) including background, history, high-level requirements, design assumptions, and rationale. It provides a basic introduction and orientation, and context for the volumes that follow.

Volume 2: Registry Overview and User’s Guide
Volume 2 describes the ADL Registry. It includes an ADL Web site user’s guide and an introduction to producing digital-object and transaction metadata. This is the "how-to" volume for those getting started with the ADL Registry.

Volume 3: Technical Reference
Volume 3 provides detailed information on using the ADL Registry for technical personnel and tool developers.

Volume 4: CORDRA
Volume 4 provides additional detail on CORDRA. Any community interested in establishing its own set of registry services independently of ADL can use CORDRA. This volume guides those who are investigating solutions to object registration and discovery in general, as well as those who wish to understand how the ADL Registry fits within the CORDRA architecture.

Volume 5: Services and Tools
Volume 5 describes value-added services and tools that are currently available or in development, and also describes how to create new services to provide extended capabilities to registry systems. Some services and tools are ADL specific; others have more general applicability and may be of value to those creating their own registry system.