Is Node ID is unique?

Prasad_Apte_(PrasadApte_(Delete)_3848183)

Hi,I am wondering if the Node ID (DataID column values in the DTree table) is unique across the Livelink volumes.For Example, I have a volume ID say 100 and a document with ID : 150 in this volume. Is it possible to have the same document ID 150 in a different Volume say 200??My understanding is that the Node ID is unique but I could see that the DataID column in the database is not have the unique constraint. Thanks in advanceThanga