ChangeValue

The ‘reasonForChange’ attribute is used across all features found within the OS MasterMap Highways Network. The table below describes the codes which will be used to populate this field and the description for each code.

Code List: ChangeValue

https://www.ordnancesurvey.co.uk/xml/codelists/ChangeTypeValue.xmlwww.ordnancesurvey.co.uk

Code	Description
New	New feature has been added.
Modified Geometry	The geometry of the feature has been altered.
Modified Attributes	One or more attribute properties have been altered.
Modified Geometry And Attributes	Geometry and attribution properties have been altered.
End of Life	The feature has been removed from Ordnance Surveys master database. This value will only be used with Change Only Update orders.