An audience described, then measured.

The opening move is to find out whether the audience exists at all. The same record arriving twice is collapsed, and which copy won is recorded. Every claim the file makes about itself can be checked against it.

• Tenure checks

  Testing whether a named individual is still in the role the record claims for them.

• Competitor screening

  Removing organisations you would rather not approach, from a list you define.

• Whitespace discipline

  Removing the invisible differences that make two identical values compare as different.