title: RELEVANT METADATA TO PRESERVE “ALIEN” AIP
creators: Angela Di Iorio Maurizio Lunghi
abstract: This article describes the development of Archives
  Ready To Archival Information Packages (AIP)
  Transmission a PREMIS Based Project (ARTAT).
  Following the project approach, the starting phase
  consisted of prototyping a layer conveying preservation
  metadata, which can be encoded from the existing
  archival systems, and exchanged with other repositories.
  This layer called Preservation Metadata Layer (PML)
  uses PREMIS semantics as the common language to
  overcome archival systems differences, and to transmit
  out of its original context, relevant preservation
  information about content objects comprising an AIP.
  Since a repository, following the OAIS reference model,
  usually provides resources with metadata container
  objects, the experiment performed an analysis on
  commonly used container formats, in order to enable the
  traceability of semantics from a local to extra-local
  level, and the technological understandability of alien
  AIPs. The analysis has allowed the definition of a PML
  data model, laying the production of prototypes. The
  adoption of common semantics, like PREMIS, supports
  the opportunity of preserving correctly alien AIPs,
  coming from different technological environments, and
  hopefully enables the overcoming of obstacles to the
  interoperability among diverse archival systems.