BS7666 Data Model
| Key Data Fields | |
| UPRN | I 12 |
| SAON | A 100 |
| PAON | A 100 |
| Street Name/Description | A 100 |
| Town Name | A 30 |
| Post Code | A 8 |
PAON and SAON structures
In addition to the above, PAONs and SAONs have their own internal, sub-field structure. The first 10 characters are reserved for the street number (or flat number in the case of SAONs) of a building where one exists. This includes numbered ranges as well as suffixed numbers. The rest of the field from position 11 onwards is given over to a building name or description where one exists.
If there were a property on a street called 'The Glens' that also had a numbered range on the street of 12A to 14B then the PAON would be as follows:
| 1 | 2 | A | 1 | 4 | B | T | H | E | G | L | E | N | S |
Note that the fifth and tenth position are always reserved for building number suffixes(ie A, B, C etc) if one exists and the building numbers are right justified.
Page updated: 15 Jun 2010
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