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The DSpace system is organized into three layers, each of which consists of a number of components.

DSpace System Architecture

The storage layer is responsible for physical storage of metadata and content. The business logic layer deals with managing the content of the archive, users of the archive (e-people), authorization, and workflow. The application layer contains components that communicate with the world outside of the individual DSpace installation, for example the Web user interface and the Open Archives Initiative protocol for metadata harvesting service.

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Each layer is described in a separate section:

• Storage Layer
  • RDBMS
  • Bitstream Store
• Business Logic Layer
  • Core Classes
  • Content Management API
  • Workflow System
  • Administration Toolkit
  • E-person/Group Manager
  • Authorisation
  • Handle Manager/Handle Plugin
  • Search
  • Browse API
  • History Recorder
  • Checksum Checker
• Application Layer
  • Web User Interface
  • OAI-PMH Data Provider
  • Item Importer and Exporter
  • Transferring Items Between DSpace Instances
  • Registration
  • METS Tools
  • Media Filters
  • Sub-Community Management 2002-2008 The DSpace Foundation