Acceso usuarios
Digital preservation can encompass a range of activities, from simple replication and storage to more complex transformation, depending on the assessed value and risk to the target content. These activities require planning and, in most cases, begin with a need to know the technical format of the target content. In this case, the target is the content deposited in institutional repositories (IRs). The Preserv project [1] set out to investigate the use of The National Archives' (TNA) PRONOM-DROID service (PRONOM is the online registry of technical information; DROID is the downloadable file format identification tool) for file format identification on two pilot IRs using EPrints software, and instead produced format profiles (Preserv profiles) of over 200 repositories presented via the Registry of Open Access Repositories (ROAR). Thus a primary element of preservation planning has been shown to be possible based on a standard Web interface (OAI) and no formal arrangement between repository and provider. The implications of this go beyond the numbers towards a reconceptualisation of repository preservation service provider models. Repositories and providers can shape preservation services at different cost levels that could range from comprehensive 'black-box' preservation to pick-and-mix lightweight Web-based services that build on the common starting point, format identification. This article describes the evolution of a series of models that have informed progress towards this conception of flexible and distributed preservation services for IRs.
