This presentation was delivered during the joint DPE/Planets/CAPAR/nestor training event, ‘The Preservation challenge: basic concepts and practical applications’ (Barcelona, March 2009). It explains how CASPAR aims to solve, from the technical point of view, the problem of accessibility and intelligibility of digital data in the long term.CASPAR approach is presented as an implementation of the OAIS functional model, introducing CASPAR Key Components, i.e. the main building blocks which constitute CASPAR architecture, and giving an overview of their functionalities, their usage and their role in the digital preservation workflow. The objective is to clarify how the digital preservation workflow is realised within CASPAR architecture.

1. An Infrastructure for Preservation Claudio Prandoni Marlis Valentini MetaWare SpA & CASPAR

10. OAIS Information Model Content Information Data Object interpreted using interpreted using Information Package Preservation Description Information Needed for long-term preservation Descriptive Information Needed for discovery Primary focus of archival preservation Representation Information Designated Community Knowledge Base

11. OAIS Functional Model Manager Consumer Producer

12. CASPAR Implementation Monitoring OAIS Environment Detect Changes/Impacts in DCKB Mapping out Preservation Strategy Provide Recommendations AIP Storage AIP Maintenance AIP Retrieval Populate Descriptive Info Maintain Descriptive Info Access Descriptive Info Receive SIP Q-check on SIP Generate AIP Extract DescInfo Coordinate updates Query Processing Retrieval Delivery Perform Transformation Security Access Control STORAGE DATA MANAGEMENT INGEST ACCESS

13. CASPAR Implementation STORAGE DATA MANAGEMENT INGEST ACCESS

14. CASPAR key components Creation, maintenance and reuse of OAIS Representation Information Allow search of an object using either a related measurable parameter or a linkage to remote values Construction and unpackaging of OAIS Information Packages Centralised and persistent storage and retrieval of OAIS Representation Information, including PDI OAIS-based Preservation Aware Storage, providing built-in support for bit and logical preservation

15. CASPAR key components Information discovery services Definition and enforcement of access control policies Registration of provenance information on digital works and retrieval of right holding information Maintenance and verification of authenticity in terms of identity and integrity of the digital objects Reception of notifications from Publishers for a specific “topic” and sending of alerts to Subscribers Definition of Designated Communities, identification of missing Representation Information

16. The CASPAR Workflow

18. Ingestion steps

20. Access steps

22. Preservation steps

25. Phaistos disk (1700 BC) We still cannot understand it (the meaning has not been preserved ) We can only understand it’s a “sequence of symbols”…

26. Rosetta Stone (196 BC) … just a “ sequence of symbols”… but… Ancient Heroglyphic Egyptian Demotic Egyptian Greek

28. Web Application

40. Conclusion Platform Operating System: Linux, Unix, Windows, Mac Java Platform DBMS: H2, Postgres Framework Development Framework: JAX-WS, GWT, Ant Application Server: Tomcat, Glassfish, WASCE KeyComponents GapManager Orchestration DataAccess&Security RepInfoToolbox Registry Packaging DataStores Virtualisation CASPAR Service Factory Authenticity SemanticWeb DigitalRights FindingAids Development Management: Hudson and JTrac The CASPAR Foundation

43. CASPAR Preservation Nodes