Page History

For Identifiers (just the complete URI and local part, not about mechanisms)

	HDL	PURL	PURLz	HNRS	DOI
permanent	Yes ?	?	?	?	?
permanently resolve to a digital object	Yes ?	?	?	?	?
unique within our PID system without the DNS name portion of the	?	Yes; very flexible naming, including pseudo/paths ?	?	?	?
URL?	?	?	?	?
works with VIVO, arXiv, OAIS (CUL), Voyager Catalog, and WorldCat etc.	?	Yes ?	?	?	?
resolvable through a web browser	?	?	?	Yes ?	?
Simplicity	?	Yes ?	?	?	?
support for a local namespace prefix and an identifier part	Yes ?	?	?	?	?
support for opaque identifiers	?	?	Yes ?	?	?
Local part should not be Cornell branded	?	?	?	completely flexible ?	?
may be surrogate for physical object	?	? Yes	?	?	?
should be short (so use 26 letters plus numbers)	?	?	?	? Yes	?
should be easy to copy by hand	?	?	?	depends on the length ?	?

For Resolver and System

	HDL PURL	PURLz	HNRS	DOI
Supports billions of identifiers	?	?	Don't know; limited to the practical capacity of the underlying database.?	?	?
Robust architecture	?	?	?	Yes?	?
Robust implementation	?	?	?	Yes?	?
ability to request metadata about the identifier	Yes?	?	?	?	?
lightweight understanding of identifier equivalence	?	?	?	Yes?	?
should be easily discoverable by Google ?	Yes; the resolvers can't be crawled without providing a dump	?	?	?	?
integrate well with the "web architecture"	?	Yes?	?	?	?
vitality checking	? ?	?	?	?
Need to avoid unbounded generation of surrogate persistent identifiers	?	?	?	?	?
PID corresponding to every Cornell NetID	?	?	?	?	?

Governance Issues

	HDL	PURL	PURLz	HNRS	DOI
Requires payment to external organization	?	?	?	one-time $50 payment per named resolver (not mirrors)?	?
Can continue resolve IDs in absence of external organization	?	?	?	Yes?	?

HDL is Corporation of National Research Initiatives's Handle system.
PURL is OCLC's PURL system.
PURLz is Zepheira's and OCLC's new persistent URL work.
HNRS is the Harvard Name Resolution Service.
DOI is IDF's DOI system.

Child pages

Versions Compared

Old Version 16

New Version 17

Key

For Identifiers (just the complete URI and local part, not about mechanisms)

For Resolver and System

Governance Issues