A key used to indicate errors with data from the NaPTAN database import. This information is added manually by surveyors who have verified the NaPTAN data out in the field.
A minor point: It is my view that the word Error should not be capitalized as it is not representing data imported from the NaPTAN database. My preference would be naptan:error=* purely for clarity. As of 07 Dec 2009 there are only thirteen entries so they could be easily be updated. User:Caldini 07 Dec 2009