http://www.ariadne.ac.uk/authors/nick-nicholas/ Recent content in Nick Nicholas on Ariadne Hugo -- gohugo.io en-gb Sat, 30 Jan 2010 00:00:00 +0000 http://www.ariadne.ac.uk/issue/62/nicholas-et-al/ Sat, 30 Jan 2010 00:00:00 +0000 http://www.ariadne.ac.uk/issue/62/nicholas-et-al/ Discussion of digital identifiers, and persistent identifiers in particular, has often been confused by differences in underlying assumptions and approaches. To bring more clarity to such discussions, the PILIN Project has devised an abstract model of identifiers and identifier services, which is presented here in summary. Given such an abstract model, it is possible to compare different identifier schemes, despite variations in terminology; and policies and strategies can be formulated for persistence without committing to particular systems.