Identifier

Identifier - One or more attributes that uniquely locate an occurrence of an entity type. conceptually synonymous with primary key.

[Category=Data Quality ]

Source: Larry English, http://www.iaidq.com/main/glossary.shtml , 28-Jan-2009 14:20

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identifier - [computing] A unique character string or numeric value associated with a particular object.

[Category=Geospatial ]

Source: esri, 15 May 2012 09:15:39, http://support.esri.com/en/knowledgebase/GISDictionary/term/abbreviation