Definition: Completeness (of an administrative dataset)
In terms of variables, the extent to which an administrative dataset contains the relevant items for the units of a given target population. Incompleteness in terms of units is synonymous with under-coverage.
European Statistical System (ESS), "Admin Data Glossary. Definitions adopted for certain terms related to the use of administrative data for producing business statistics", ESSnet Admin Data (Overview of MSs’ Existing Practices in the Uses of Administrative Data for Business Statistics), Deliverable 1.1, 2013