This is the XML structure define in versions 2.1 and later of the QTI specifications. A QTI Test is composed of one or more QTI Test-Parts. Each QTI Test-Part MUST contain at least one QTI Section. Typically, QTI Test-Parts are used for administrative purposes e.g. the full test may have several separately scheduled delivery sessions and so each session would be expressed as a QTI Test-Part.
