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What is a DOI?

A Digital Object Identifier or DOI is a unique alphanumeric string used to identify an digital object and provide a permanent link online.  DOIs are often used in online publications in citations.  DOIs are assigned and regulated by The International DOI Foundation (IDF). ()
DOIs are alphanumeric strings in the following format:
–doi:[prefix]/[suffix]
Prefix – 10.[number] where [number] identifies registrant agent.  5067 has been assigned for NASA ESDIS.
Suffix – uniquely identifies the data item and it’s format is assigned and managed by the registrant agent.
DOIs provide persistent identification, enabling easier access to research data.  Use of DOIs makes provenance trackable, increasing verification and validation of scientific results.