A specified version of a trend group (e.g., 2017 QSM Business, as opposed to 2013 QSM Business). Projects and templates can be configured to use the default version of a trend (specified by the Back Office) or a specific (named) trend version (2013 QSM Avionics). Choosing the default trend version allows automatic update of all projects using the default trend group when the default trend group is updated by the Back Office administrator.