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Items will be retained indefinitely.
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The repository will try to ensure continued readability and accessibility.
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The repository regularly backs up its files according to current best practice.
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The original bit stream is retained for all items, in addition to any upgraded formats.
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Items may not normally be removed from the repository.
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Acceptable reasons for withdrawal include:
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Withdrawn items are not deleted per se, but are removed from public view.
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Withdrawn items' identifiers/URLs are retained indefinitely.
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URLs will continue to point to 'tombstone' citations, to avoid broken links and to retain item histories.
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Changes to deposited items are not permitted.
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Errata and corrigenda lists may be included with the original record if required.
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If necessary, an updated version may be deposited.
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In the event of the repository being closed down, the database will be transferred to another appropriate archive.
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For more information see webpage: