The DOI system is an implementation of the Corporation for National Research Initiatives's (CNRI) handle system, a system for assigning names to objects for name resolution. DOIs are handles with the prefix "10."; handles for other namespaces in the Handle System have different prefixes. DOIs can be resolved at The DOI System and at The Handle System
A DOI can apply to any form of document expressed in any digital environment, including both physical and digital media manifestations, performances and abstract works. DOIs can be used to identify: e-texts; images; audio or video items and software, etc. An entity can be identified at any arbitrary level of granularity. This means that, for instance, DOIs can identify a journal, an individual issue of a journal, an individual article in the journal or a single table in that article.
An example of a complete DOI is:
10.1000is the prefix:
10is the directory code. The directory code must be numeric; valid directory codes are determined by the maintenance agency (the International DOI Foundation). At present, the only valid directory code is 10 and all valid DOI's begin with "10.".
1000is the registrant's code or publisher ID, identifying the registrant. In this case, the number identifies the International DOI Foundation.
182is the suffix, or item ID, identifying the single object. (Typical suffixes are longer than this example.) In this case, the object corresponding to doi:10.1000/182 is the DOI Handbook, Version 4.4.1.
The prefix is assigned by a DOI Registration Agency to a specific registrant. The suffix is assigned by the registrant and must be unique within a prefix. It can integrate existing standard identifiers such as an ISBN or ISSN, or SICI. The DOI is case insensitive and is considered an "opaque string": nothing can be inferred from the number with respect to its use in the DOI System.
The correct way to cite a DOI on a webpage or in a publication is doi:10.1000/182
"What the DOI identifies" and "what the DOI resolves to" are two different concepts: it is possible that a DOI does not resolve to the identified entity, but just to some related information wished by the publisher.
DOI resolution is provided through the Handle System technology, developed by the Corporation for National Research Initiatives, and is freely available to any user encountering a DOI. To resolve a DOI, just type in the address bar of any web browser the string
followed by the DOI of the document.
For example, to resolve the DOI 10.1000/182, enter into your browser the address:
http://dx.doi.org/10.1000/182. Of course, web pages or other hypertext documents can include hypertext links in this form, as in this sentence which links to the DOI Handbook Some browsers allow the direct resolution of a DOI (or other handles) with an add-on.
There are several other ways to resolve a DOI, for example, one can use
http://hdl.handle.net/ followed by the DOI of the document.
The DOI organization has applied for a "doi:" URI scheme to allow a DOI to be expressed as a Uniform Resource Identifier (URI) without requiring reference to a specific HTTP server as in the previous paragraph. As of April 2006, this had not been approved.
Metadata, as well as the DOI they are associated to, are persistently connected to the object they describe, so they can be easily communicated to other subjects across the productive and distributive chain, enhancing a content producer's ability to trade electronically. Furthermore, metadata represent the key for the development of DOI-based services, such as transnational databases and search engines for different kinds of contents. Asserting that metadata are persistent does not mean they are unmodifiable: registrants may update metadata about their contents any time they wish (whether some publication data change, when the primary URL the DOI resolves to is modified, etc.).
IDF is controlled by a Board elected by the members of the Foundation, with an appointed full-time Director who is responsible for co-ordinating and planning its activities. Through the elected Board, the activities of the Foundation are ultimately controlled by its members. Membership is open to all organizations with an interest in electronic publishing and related enabling technologies.
Currently, eight major RAs are active worldwide, as listed at www.doi.org:
US Patent Issued to Samsung Electronics on Oct. 4 for "Method and Apparatus for Searching for Rights Objects Stored in Portable Storage Device Object Identifier" (South Korean Inventors)
Oct 11, 2011; ALEXANDRIA, Va., Oct. 11 -- United States Patent no. 8,032,941, issued on Oct. 4, was assigned to Samsung Electronics Co. Ltd....
Digital object identifier is keystone to digital rights management.(report from Content Division of the Software and Information Industry Association (SIIA).)(Brief Article)
Aug 01, 2001; The role of the digital object identifier (DOI) as a facilitator of secure and traceable e-commerce for online content providers...
US Patent Issued to SAP on Aug. 27 for "Managing Consistent Interfaces for Communication System and Object Identifier Mapping Business Objects across Heterogeneous Systems" (German Inventors)
Aug 27, 2013; ALEXANDRIA, Va., Aug. 27 -- United States Patent no. 8,521,838, issued on Aug. 27, was assigned to SAP AG (Walldorf,...