1. Persistently identifying Web site content Future-proofing Institutional Web sites DCC and Wellcome Library workshop

17. Anatomy of ‘http’ URIs http:// www.somewhere.ac.uk/physics/index.cfm ? name=about http:// www.somewhere.ac.uk/chemistry/report.rtf ‘ http’ URI scheme – URI persistence not reliant on HTTP protocol, but is reliant on continued registration and management of the scheme (and of the URI spec. itself!) DNS domain name – persistence reliant on continued ownership and management of the DNS domain name (and the DNS!) Component hierarchy, often organisationally based – persistence reliant on continued management of component structure, i.e. not re-using old components Server technology – change of technology may enforce change of URI, leading to multiple URIs for same resource (with no simple mechanism for determining equivalence) File format – inappropriate if identifier is for the ‘work’ rather than the ‘manifestation’ - because changing the format will result in a new URI

20. Questions…