Documentation for individual data value

Behind the Vision of Britain web site is a true data library, a collection of individual statistics each with its own metadata to tell users what it means. These metadata also control how the system visualises statistical data through graphs and maps. This is what we know about the particular data value you selected:

Attribute	Value	Meaning
Identifier	17313221	This number locates the particular value within the data table; it is like an accession number in a conventional library.
Value	7,817	This is the data value itself.
Date(s) covered	1881	We store dates within a date object, which can hold anything from a simple year value, for a census, to a period defined by two calendar dates.
Administrative area covered	10186006	Cardiganshire AncC
Meaning (DDS cell reference)	AGCEN_CROP_1881:wheat	Cell within nCube N_AGCEN_CROP_1881: Acreages of different crops, as reported by the Agricultural Census in 1881. Dimension Variable Category 1 Agricultural Census Crop Categories, 1881- Wheat Universe: Total arable area in acres
Source	AgStat	Ministry of Agriculture, Agricultural Statistics (HM Stationery Office) ,
Status	P	Public. Visible in both graphics and tables.
Precision	E	Exact
Created by	agcen_cnty	This is the name of our script which inserted this data value into the main data table. For non-derived values, this is usually done by copying data values across from our more conventional GBHDB database, and the scripts are usually named after the table in GBHDB they copy data from.

This table lists, in its "value" column, a single row from our data table. The values are mostly identifiers and codes which are given meaning by our main sub-systems, and the "meaning" column reaches into these to tell you more.