|Questionnaire Specification||Exchange||The tool designed to elicit information from observation Units.|
This represents the complete questionnaire design, with a relationship to the top level Questionnaire Component.
There may be many different Questionnaire Specifications, for the same surveys, or tailored to individual observation Units (respondents) so that there would be a different Questionnaire Specification for each respondent. The design would also differ depending upon the specific mode of collection the Questionnaire is designed for.
|Valid From||The date from which the object can be used||0..1||Date|
|Valid To||The date after which the object cannot be used||0..1||Date|