1. Information in general
We live in the information age; nevertheless, when you ask what “information” is, the answers you get are so far apart, that it might have a good chance for the least defined term of the decade. So, if one embarks upon a study of what is different between the kind of information one encounters in contemporary documents and that which is used for historical research, one has to give a definition, or at least a description, of how one understands the term.