Standardising and Coding Birthplace Strings and Occupational Titles in the British Censuses of 1851 to 1911

Abstract This article presents a technique of standardising and coding textual birthplace and occupation strings in the censuses of England and Wales and Scotland, 1851–1911. While the approaches for the two text strings are different, they are both based upon the integration of computer technologies, mathematical methods, and expert knowledge. Both processes are described formally using Structured Analysis and Design Technique methodology. The classification of occupations is defined by two algorithms based on statistical decision theory in order to allocate codes from the original occupation strings. The method of standardising parishes is based on the comparison of original birthplace strings and reference data.

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