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Abstract
The Digital Author Identifier (DAI) is a unique national number assigned to every author who has been appointed to a position at a Dutch university or research institute or has some other relevant connection with one of these organisations. The DAI brings together various different ways of writing the author's name and distinguishes between authors with the same name. Read more...
What is a Digital Author Identifier?
De Digital Author Identification (DAI) is een uniek landelijk nummer voor elke auteur, met een aanstelling of een andere relevante band bij een Nederlandse universiteit, hogeschool of onderzoeksinstituut. Het gebruik van de DAI is geregistreerd bij het het College Bescherming Persoonsgegevens (CBP) en de DAI is voorbereid op de internationale ISO standaard "ISNI" (International Standard Name Identifier).
- In English: http://en.wikipedia.org/wiki/Digital_Author_Identification
In Dutch: http://nl.wikipedia.org/wiki/Digital_Author_Identification
Syntax
(better explanation needed!)
The DAI (or PPN) contains 9 to 10 characters. The first 8 to 9 characters are numbers. The last (9th or 10th) character is a control character. The control character is a modulus 11 check digit, like in the ISBN. More on the Mod11 algorithm can be found on for example wikipedia.
At the moment the INFO-URI namespace is used as an authority namespace. The DAI is URI-fied under the EU-REPO sub-namespace. This namespace defines components for compound objects in the Institutional Repositories.
How does a DAI look like
URI-fied a DAI looks like this: info:eu-repo/dai/nl/123456785
The DAI is the number after the string info:eu-repo/dai/nl/ . A DAI is a number like 123456785. The last character is a MOD11 check-digit.
The string: info:eu-repo/dai/nl/ is just an authority namespace, telling the user or machine that the number is a DAI originating from the Netherlands.
Click here to read more about info:eu-repo/dai/nl/
In practice the DAI can be used to unambiguously retrieve publications from one author across different systems. Click for example in NARCIS.
How does the DAI fit in to the ISNI? It is said it can be done by OCLC. But how? The ISNI is a 16-digit number. Does this subset of dutch authors get a prefix? What about the last control number?
XML schema
(better explanation needed!)
For the MODS metadata an extension has been made. The XML shema of the extension can be found here: http://purl.org/REP/standards/dai-extension.xsd
For the use of this extension in MODS see: Use of MODS
OWL
The DAI OWL file can be found at http://purl.org/info:eu-repo/dai#
Identifier workflow
(better explanation needed!)
Overview of the Technical DAI Infrastructure
Organisational overview
