Identifiers: Difference between revisions
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To obtain a DOI Prefix, you need to work either with a [http://www.doi.org/handbook_2000/registration_agencies.html DOI Registration Agency] or, for experimental or prototype purposes, with the International DOI Foundation. | To obtain a DOI Prefix, you need to work either with a [http://www.doi.org/handbook_2000/registration_agencies.html DOI Registration Agency] or, for experimental or prototype purposes, with the International DOI Foundation. To obtain a DOI prefix for experimental use, write to the IDF at contact@doi.org, giving clear indication why it is required. Prefixes issued directly by the IDF will be at a cost of US$1,000 per prefix. These prefixes will be issued purely at the discretion of the IDF. | ||
[http://www.doi.org/registration_agencies.html List of agencies]. | |||
[http://www.doi.org/handbook_2000/enumeration.html DOI Numbering] | [http://www.doi.org/handbook_2000/enumeration.html DOI Numbering] | ||
Revision as of 11:08, 5 December 2005
Digital Object Identifier - a digital identifier for any object of intellectual property (from DOI FAQ and The Biology Wiki).
The DOI is a Handle System implementation.
The Handle System is a comprehensive system for assigning, managing, and resolving persistent identifiers, known as "handles," for digital objects and other resources on the Internet.
If you give each object a name (a handle), and associate that name with the object's location using the Handle System, you'd only have to update the handle record with the new location, not notify everyone who might want to find the object.
Proxy servers (DOI resolvers)
- http://hdl.handle.net/
- http://dx.doi.org/
- http://www.crossref.org/05researchers/58doi_resolver.html (goes to http://dx.doi.org/)
- DOI lookup
- OpenURL resolver can be used to retrieve DOI metadata in XML
Description of OpenURL standard OpenURL is a NISO standard syntax for transporting information (metadata and identifiers) about one or multiple resources within URLs. OpenURL provides a syntax for encoding metadata (but not a source of it), restricted to the world of URLs (unlike DOI's wider application).
On Making and Identifying a Copy
To obtain a DOI Prefix, you need to work either with a DOI Registration Agency or, for experimental or prototype purposes, with the International DOI Foundation. To obtain a DOI prefix for experimental use, write to the IDF at contact@doi.org, giving clear indication why it is required. Prefixes issued directly by the IDF will be at a cost of US$1,000 per prefix. These prefixes will be issued purely at the discretion of the IDF. List of agencies.
All DOIs start with "10." This distinguishes a DOI from any other implementation of the Handle System.
The DOI has two components, known as the prefix and the suffix. These are separated by a forward slash. The two components together form the DOI:
10.1000/123456
The prefix may be further divided into sub-prefixes, for example:
10.1000.10/123456
DOI is an opaque string (a dumb number). No definitive information can or should be interpreted from the number in use.
Handle syntax imposes two constraints on the prefix -- both slash and dot are "reserved characters".
The DOI suffix can be any alphanumeric string.
A good example is the use of DOIs in identifying articles in CrossRef. Publishers use many different schemes which all form DOIs that can then be used together: e.g.:
Publisher A uses PII: S1384107697000225 Publisher B uses SICI: 0361-9230(1997)42:<OaEoSR>2.0.TX;2-B Publisher C uses "C-numbers": JoesPaper56
These three schemes are not at all interoperable, but become so in the DOI system as:
DOI:10.2345/S1384107697000225 DOI:10.4567/0361-9230(1997)42:<OaEoSR>2.0.TX;2-B DOI:10.6789/JoesPaper56
Each publisher can retain his own scheme and does not need to switch to a new one, though all publishers need to agree on a common metadata set for their DOIs.
DOIs are case insensitive. All DOIs are converted to upper case upon registration.
DOIs may incorporate any printable characters from the Universal Character Set (UCS-2), of ISO/IEC 10646, which is the character set defined by Unicode v2.0.
PURL is not very useful because it's inherently dependent on DNS (from PURL evalution)
