The most recent version of the v4.1 materials calculator on the EPD and Sourcing of Raw Materials tabs has a column that did not exist in the v4 version called, "GBCI Docverification_ID".

We have a couple v4 projects, in which we would like to substitute v4.1 material credits. In filling out the v4.1 materials calculator, I noticed the aforementioned column. Does anybody know what information is being requested here?