Digital object identifier

Definition and Purpose of Digital Object Identifier (DOI) - DOI is a persistent identifier used to uniquely identify various objects. - It is standardized by the International Organization for Standardization (ISO). - DOIs are widely used to identify academic, professional, and government information. - They are used for journal articles, research reports, data sets, and official publications. - DOIs aim to resolve to the target information object they refer to. DOI Nomenclature and Syntax - A DOI consists of a prefix and a suffix, separated by a slash. - The prefix identifies the registrant of the identifier. - The suffix is chosen by the registrant and identifies the specific object. - Most legal Unicode characters are allowed in DOI strings. - The prefix usually takes the form '10.NNNN' where NNNN is a number. Display and Resolution of DOIs - The official DOI Handbook recommends displaying DOIs as 'doi:10.1000/182'. - CrossRef, a major DOI registration agency, recommends displaying a URL instead. - The URL format is 'https://doi.org/10.1000/182'. - This URL is persistent and redirects to the correct online location. - The entire URL is displayed to facilitate copying and pasting. - DOI names can be resolved using a DOI resolver like doi.org. - DOIs can also be included in documents as URLs using the resolver as an HTTP proxy. Content Covered by DOI System - DOIs are used for scholarly materials such as journal articles and books. - Research datasets are also assigned DOIs. - European Union official publications have DOIs. - Chinese academic journals and the Chinese National Knowledge Infrastructure project use DOIs. - DOIs are used for permanent global identifiers for audio/visual content. Features, Benefits, and Comparison of DOI System - DOIs provide persistent identification for objects. - Each DOI name permanently and unambiguously identifies the associated object. - Metadata is associated with DOIs, providing relevant information about the objects. - DOI names can be resolved to web locations where the objects can be found. - The DOI system combines the Handle System, indecs Content Model, and social infrastructure. - DOI names identify an object itself, not just its location. - DOI system makes a collection of identifiers actionable and interoperable. - DOI system offers persistent, semantically interoperable resolution. - DOI system can include identifiers from many other controlled collections. - Other identifier systems may lack functionality and accompanying metadata.