This document reports on the outcome of the Australian Partnership for Sustainable
Repositories (APSR) AONS II software development project. During the 2007
development cycle, the project aimed:
“To refine the Automatic Obsolescence Notification System (AONS)
developed in an earlier stage of APSR, to a platform-independent
downloadable tool that automatically provides information from
authoritative international registries to support decisions on
preservation action required to retain access to information resources
stored in repositories”.
The software developed during this project was intended to serve the national
interests by providing infrastructure to improve the long-term preservation of digital
• Local standalone repositories;
• Networked enterprise repositories; and
• Federated large scale repository structures.
The target repositories for the use of this software exist in education, research and
library sectors but, as an open source product there are many more potential users.
The basis for this project was the 2006 APSR AONS I prototype software project
which was a collaboration between the NLA and the Australian National University
(ANU), the software developer. The AONS II project refined and extended the work of
this earlier project.; Part II of the AONS Project was designed to provide an operational service. This report outlines the development of that service and gives details for potential users.
AONS (Automated Obsolescence Notification System) is a system to analyse digital repositories
and determine whether any digital objects contained therein may be in danger of becoming
obsolescent. It uses perservation information about file formats and the software which supports
these formats to determine if the formats used by digital objects are in danger. The information
used is gleaned from various registries (PRONOM1 and LCSDF2) and stored in a MySQL3 database.
AONS will then periodically check the contents of the repository for formats in danger of becoming
obsolescent. When the repository is found to contain such formats a notification report will be sent to the repository manager responsible. AONS supports multiple repositories with fully independent scheduling. Currently AONS only supports the DSpace4 digital repository; however, the interface between the repository and AONS is simple and well defined and it shouldn't be too hard to extend to other repositories in the future.; This preliminary report provides technical information related to the AONS (Automated Obsolescence Notification System) Project. See also "Report of the Format Notification and Obsolescence Service (AONSII)" by David Pearson and Matthew Walker.