ad‐hoc subjectsmeans themes that are of particular interest to users at a specific point in time but that are not included in the regular data sets;
detailed topicmeans the detailed content of the information to be collected about the observation units related to a topic, each detailed topic covering a number of variables;
domainmeans one or several data sets that covers particular topics;
headline indicatormeans widely used information that serves to monitor a central objective of Union policy;
metadatameans information that is needed to use and interpret statistics and that describes data in a structured way;
microdatameans non‐aggregated observations or measurements of characteristics of individual units, without direct identifier;
observation unitmeans an identifiable entity about which data can be obtained;
pre‐checked microdatameans data or microdata without direct identifiers, verified by the Member States on the basis of common validation rules where available;
private householdmeans a person living alone or a group of persons who live together, providing oneself or themselves with the essentials of living.
quality reportmeans a report conveying information about the quality of a statistical product or process;
sampling framesmeans a list, map or other specification of the units which determine a population that is to be completely enumerated or sampled;
topicmeans the content of the information to be collected about the observation units, each topic covering a number of detailed topics;
usual residencemeans the place where a person normally spends the daily period of rest, regardless of temporary absences for purposes of recreation, holidays, visits to friends and relatives, business, medical treatment or religious pilgrimage.
variablemeans a characteristic of an observation unit that may assume more than one of a set of values;