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Piql and OAIS
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reference model
OAIS defines metadata as Preservation Description
Information (PDI):
• Reference Information (UUID)
• Provenance Information (history)
• Context Information
• Fixity Information (integrity)
• Access Rights
Piql is easily configured to accept any metadata
standard.
FILE FORMAT NORMALIZATION
Normalization means converting ingested files into a
small number of pre-selected formats. We do this be-
cause some file formats are easier to preserve than oth-
ers. Also a smaller number of formats means that fewer
preservation actions are required.
CRITERIA FOR CHOOSING PRESERVATION FILE
FORMATS
The Piql repository assesses potential preservation file
formats against the following criteria:
• The full specification of the format must be openly
available (anyone with sufficient skills should be able to
build software to read file format accurately).
• No patent, intellectual property rights or other rights
attach to the format. (It should be possible to create
the software for reading the file format without license
from the patent holder).
• The format is widely endorsed and/or adopted (audio
files should not be compressed)
Piql Preservation Services meet all requirements for long-term digital preservation based on the OAIS
model, providing a reliable, understandable and long-term access to managed digital objects to its
designated communities, now and in the future.
SUMMARY