Definitions for "Logical record"
A collection of related data elements, referring to one person, place, thing or event, that are treated as a unit and have either a fixed or variable length.
A collection of data whose location and extent are defined in terms of the information it contains and not in terms related to the physical medium on which it is stored. Portions of the same logical record may be located in different physical records, or several logical records may be located in one physical record. Source: ESADS.
A complete unit of data for a particular unit of analysis, in this project a single respondent. Multiple physical records, called cards or decks, may make up a logical record.