Page History

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Issues in Permanent Identifiers.

Here is a workshop on PI?s.

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This distinction is made, and I think importantly, in this document:
http://www.cdlib.org/inside/diglib/ark/.h2

SYSTEMS

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ARK

To quote: (http://www.cdlib.org/inside/diglib/ark/)
The Archival Resource Key (ARK) identifier is a naming scheme for persistent access to digital objects (including images, texts, data sets, and finding aids), currently being tested and implemented by the California Digital Library (CDL) for collections that it manages.
An identifier is an association between a string (a sequence of characters) and an information resource. That association is made manifest by a record (in the case of this service, a METS record ) that binds th[e identifier string to a set of identifying resource characteristics. The ARK identifier is a specially constructed, globally unique, actionable URL. Each ARK links end-users to three things:

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And this:
http://www.sspnet.org/files/public/Kunze.htm.h3

PURL

http://purl.oclc.org/docs/inet96.html

But PURL are actually persistent locators ? that is after all their name. A PURL does not offer any service except that of resolution to its destination. There is no way to get metadata about the object, and no way to determine an institutions commitment to maintain a PURL. No way to store alternate, or backup URL?s, and no way to provide context specific resolution..h3

Handles

http://www.handle.net/introduction.html
The LOC has this writeup on Handles: http://lcweb2.loc.gov/ammem/award/docs/h-s2.html
http://www.handle.net/rfc/rfc3651.html

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• URL: Values of type URL are UTF8-encoded URIs that specify the location of the object identified by a handle.
• EMAIL: Values of type EMAIL are UTF8-encoded email addresses.

PID Pros and Cons: