This section describes access conditions and terms of use for the data collection. In cases where access conditions differ across individual files or variables, multiple access conditions can be specified. In cases where access conditions differ across individual files, variables, or categories multiple access conditions can be specified. The access conditions applying to a study, file, variable group, variable or category can be indicated by an IDREF attribute on the study, file, variable group, nCube group, variable, category, or data item elements called "access". The member element "typeOfAccess" is of the type "concept" and is intended to provide a specific type of access. If a license applies to the data access, use the optional "license" element.