High Level Design Documentation
work in progress
Introduction
A DOMS is a Digital Object Management System. This document describes the open source DOMS developed at the State and University Library in Aarhus, Denmark. Program sources for our DOMS are accessible at <TODO: SOURCE FORGE URL>.
The DOMS aims at fulfilling the following objectives.
- Stores and handles digital material and metadata, with a view to long-term preservation
- Supports re-use of components in new collections of material
- Supports a common index with possibility for relations between objects
- Is modular with possibility for additions to the system
- Can be monitored and maintained by non-developers
What is not part of the objectives:
- Establishing work flow systems and ingest systems
- Handling authorisation
Overview of a DOMS system
Our DOMS keeps its data in two different kinds of storage:
- A Fedora repository
- A bitstorage
The Fedora repository keeps metadata, and the bitstorage keeps the actual digital material files. If, for example, we were to store audio CDs in a DOMS, the actual digitized tracks, along with scanned cover art, could be stored as files in the bitstorage. The Fedora then would keep an object (or a cluster of objects) representing the CD, and containing information about for example artist(s), production year and record label, as well as information relating this CD to the digitized material in the bitstorage.
System structure
Our system is available as several different packages, each containing part of the DOMS, and each part interacting with the others.
The packages comprised by the DOMS are the following.
- Fedora ECM
- Interface to bitstorage
- Interface to search engine
- OAI-PMH handling
- The DOMS GUI
In addition, the following separate projects are needed:
Fedora repository (available at: <TODO: INSERT URL>)
Finally, you may need:
- A bitstorage that the system will use
- A search engine that the system will interface to
The figure below illustrates how the different modules make use of each other.
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DOMS objects
The metadata stored by the DOMS is represented as objects inside a Fedora repository.
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Datamodels
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Usage of a Fedora repository
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Usage of the Fedora ECM
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Validation
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Interfacing with a bitstorage
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Handling OAI-PMH requests
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Interfacing to search engines
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Usage of the DOMS GUI
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The included testbed
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