Data interpolation was a process whereby missing information could be reconstructed.
In 2369, Miles O'Brien and Jadzia Dax used data interpolation to, as O'Brien put it, "fill in the gaps" present in badly garbled log entries from the Klingon vessel IKS Toh'Kaht. The ship had exploded soon after exiting the Bajoran wormhole, forcing Dax and O'Brien to employ this forensics technique. (DS9: "Dramatis Personae")