Verification rules are applied to each record by the NBN Record Cleaner. They are simple text files which can be created for any taxonomic group or geographical area.
There are nine main types of rules.
TestType
Explanation
AncillarySpecies
Specifies a list of species that are expected to be found.
CheckList
This checks that the value of a field contains only a predetermined set of values.
Period
Checks that records are within a date range.
PeriodWithinYear
Allows records to be checked for being within a range of dates in any year.
Polygon
This checks that the coordinates of the record are within the polygons supplied.
WithoutPolygon
Checks that grid squares or Vice-counties are in the list specified.
RegularExpression
Checks that the content of a field contains values that pass the specified regular expression check.
IdentificationDifficulty
Supply identification difficulty tags (in the range 1-5) for species.
External Scripts
Test records against custom external modules.
Information on how to create and distribution rule files for your taxonomic group or area can be found in the Rule Guide which may be downloaded below.
NBN Record Cleaner Rule Guide
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