DOI

Created in 1997, the DOI system is the result of an initiative of academic publishers of digital content. Since 1998, it is a project managed by the International DOI Foundation to promote intellectual property in electronic publishing and to locate documents on the Internet, ensuring their persistence and availability.
A DOI (Digital Object Identifier) is a unique and permanent digital identifier for objects (journal articles, books, etc.).
A DOI name provides information about the digital object (author, title, publication data, etc.) through metadata and about its Internet location. It uses the handle system, that is to say, the URL does not change even if its location changes (persistent identifier).
Benefits of DOI
A DOI uniquely identifies an electronic publication and gives a stable reference for its location, even if the URL or email address changes. Thus, promoting the visibility of the academic publication and its impact.
DOIs may lead to open access content and to restricted content if we are not subscribed.
Information of interest about the DOI
You can find more information at our Intellectual Property and Open Access website (in Catalan):

• What is a DOI?
• Who assigns DOI numbers?>
• How do I get a DOI for an academic journal?
• How do I get a DOI for a dataset?
• How do I cite a DOI?

DOI, handle and the DDD
The handle system applies a unique, short and persistent URL to digital resources. It is an information system developed and distributed by the Corporation for National Research Initiatives (CNRI).
All the URLs of the documents deposited in our institutional repository, the Dipòsit Digital de Documents de la UAB are persistent identifiers, playing the same role as the handle system or the DOI system: they are permanent and never change.
Example: https://ddd.uab.cat/record/13002?ln=en