DCMI Global Meetings & Conferences, DC-2011, The Hague

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Product Lifecycle Metadata Harmonization with the Future in OAIS Archives
Jörg Brunsmann

Last modified: 2011-08-27


Metadata plays a crucial role to maintain the traceability and understandability of large product data collections generated throughout all product lifecycle phases. Therefore, product data models are annotated with metadata which represents meaning that conforms to evolving metadata schemas. Due to business, contractual and legal reasons, these semantically enriched product data models are ingested into OAIS (Open Archival Information System) based archives for later reuse. Remarkably, it is not uncommon that products are in operation for several decades while engineers and their embodied knowledge retire or leave the company. This product longevity, volatile knowledge and rapid technology innovations require special preservation processes to keep the archived product data and metadata interpretable. While preservation of product data is concerned with product data model normalization, validation and file format migration, the preservation processes of metadata are of different nature since global metadata schemas can evolve independently in a non backward compatible fashion. Although widely referenced, the OAIS reference model unfortunately does not observe metadata schema versioning and metadata harmonization in deep detail. Therefore, this paper aims to introduce dedicated metadata preservation functionality into OAIS archives based on operational schema update processing.

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