part of the 1841 occupational table

The Vision of Britain system holds a large library of historical statistics. We store all the data values in one big list, and for each value we record:

We record WHAT each number measures via our implementation of the Aggregate/Tabular Data Extension developed by the Data Documentation Initiative. This places each data value within an nCube whose dimensions are defined by variables (sometimes organised into variable groups), like occupation and gender and age, each of which is a set of categories, such as "Males" and "Females":


The implementation is structured as an ontology containing 6,152 entities of the following types, linked by 19,427 relationships:

Entity typeEntities in system
Databases 1
Themes 10
Rates 63
nCube Groups 12
nCubes 184
Variable Groups 16
Variables 169
Categories 5,623
Measurement Units 14
Universes 60