... technical items relating to the interview
- year of survey,
- reference week,
- interview week,
- Member State,
- region of household,
- degree of urbanisation,
- serial number of household,
- type of household,
- type of institution,
- weighting factor,
- sub-sample in relation to the preceding survey (annual survey),
- sub-sample in relation to the following survey (annual survey),
- sequence number of the survey wave.
