[NTG-context] Main or Overall Index of a series of volumes

Hello All, just to plan in advance: I'd like to construct a main or overall index out of the indices of a series of rather big volumes with their own page numbering from 1 to (say) 1000. Of course the intended main or overall index should point not only to a page number, but to the corresponding volume number or title too. Is that fundamentally possible and if yes how? Greetings, Rudolf