In the forums we generally said that a datatype is a reference to while a milestone is an occurrence of. However, this does not apply to Bible Commentaries where the milestone bypasses the actual text and goes to the start of the commentary on ... This makes life very difficult when one wants to find all the occurrences of the Biblical text ... you aren't going to find those embedded in commentaries (or Text Creation Partnership and eBook resources but that is for a different reason). How would you search for occurrence of a Biblical text in non-Bible resources?