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Taifid a bhogadh ó chóras amháin go córas eile agus, ag an am céanna, a mbarántúlacht, a n-iomláine, a n-iontaofacht agus a n-inúsáidteacht a choimeád ar bun. Is é atá i gceist le haistriú ná sraith tascanna eagraithe atá ceaptha chun ábhar digiteach a aistriú ó thráth go chéile ó chumraíocht chrua-earraí amháin go ceann eile, nó ó ghlúin áirithe teicneolaíochta go ceann eile.
The act of moving records from one system to another, while maintaining their authenticity, integrity, reliability and usability. Migration involves a set of organised tasks designed to periodically transfer digital material from one hardware or software configuration to another, or from one generation of technology to another.