AddressBase Plus Islands will be supplied as non-geographic chunks only. This is a way of dividing up the data into chunks that are supplied in separate volumes, which have a fixed maximum amount of records. The supply is not supplied with any reference to the geographic position of records.
Customers are able to take the AddressBase Plus Islands product as a Full Supply or Change Only Update (COU) supply.
The filename will be constructed as follows:
productName_supply_ccyy-mm-dd_vvv.format
Where:
ProductName is AddressBasePlus_ISL.
supply is defined as FULL or COU.
ccyy-mm-dd is the date the file was generated.
vvv is the volume number of the file.
format is the format of the files received, for example, csv or gml.
For example:
AddressBasePlus_ISL_FULL_2013-05-28_001.gml (GML full supply)
AddressBasePlus_ISL_COU_2013-05-28_001.csv (CSV COU supply)
If the data has been provided in a ZIP file, the filename will be constructed as follows:
productName_supply_ccyy-mm-dd_vvv_format.zip
For example:
AddressBasePlus_ISL_FULL_2013-05-28_001_gml.zip (GML full supply zipped)
AddressBase Plus Islands is available as a Full or Change Only Update supply.
A change-only update (COU) supply of data contains records or files that have changed between product refresh cycles. The primary benefit in supplying data in this way is that data volumes are smaller therefore reducing the amount of data that requires processing when compared to a full supply.
COU data enables a user to identify three types of change:
Deletes (CHANGE_TYPE ‘D’) are objects that have ceased to exist in your area of interest since the last product refresh.
Inserts (CHANGE_TYPE ‘I’) are objects that have been newly inserted into your area of interest since the last product refresh.
Updates (CHANGE_TYPE ‘U’) are objects that have been updated in your area of interest since the last product refresh.
When users are Deleting, Inserting or Updating features it is up to the user to consider their archiving requirements. If deleted records are important to your business requirements you must take appropriate action to archive previous records.