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Jan Molendijk
PIDs in EuropeanaWebinar, 15 February 2013
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Europeana and PIDs
• As an aggregator of aggregators, Europeana is hit hard by lack of PIDs
• Typically 3% of dead links – Temporary outages– Objects moved, URLs changed
• http 301 redirects not used very much• Daily checks and feedback through
http://sandbox22.isti.cnr.it/linkcheck_results.html
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Our own Europeana IDs
• Hash based on dataset ID and object ID– http://www.europeana.eu/portal/record/
92034/666518D4D3B2808F4891C0205E7D41214CA5F108.html
• Heuristics to keep dataset ID constant• Object ID comes from data provider, so is
just as ‘persistent’ as the original• Growing number of object IDs that are
‘official PIDs’
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Advocacy
• Need for PIDs explained in handbooks and instructions for Data Providers
• We have to be agnostic as to which PID scheme is used
• Need for meta-resolver?– Not really: users of PIDs als give us good
URIs
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Europeana – How can we help
• Europeana is more than just ‘the office’
• Network of >500 motivated individuals, 2200 Data Providers, Aggregators and projects
• So how can we help?– Should we perhaps assign PIDs and share
with providers?– How can we improve advocacy?