I don't know the exact coding but their TRV is linked to their parents. They will be able to enroll in school, etc. with this. And also eligible for provincial healthcare but not allowed to work! LOL. Maybe PMM can shed some light on this.
Just remember that everything is linked. The TRV that is issued to the principal applicant was issued BECAUSE they met the criteria as a worker. The dependents are linked to the principal applicant and so on.
To rjessome:
Okay. It seems that the OP will have to enter the dependents' name on the application form and mark whether accompanying or not.
To Unoy_po:
You will have to mark accompanying on the application form so that all of you will be processed at the same time. It is okay that they don't leave for Canada at the same time that you do. What is important is their visa application are processed with your own.