> Yes, there is. That is why an *artifact* - a given *hardcopy* of a > manual - has a *publisher*. As I mentioned in an earlier reply at some > point to someone, a given manual applies to a single machine > *manufacturer* (e.g., Apollo is considered the manufacturer of the DN > series, even though, technically, later HP made them for a year or two), but a > given manual with the same number the applies to them might have Apollo > as a publisher (older copy) and HP (newer copy - with the same contents). > > A given hardcopy of a manual could not change publishers. The publisher is > permanent characteristic of that copy. >
MOST attributes can change over time as new information comes to light. So for example I also follow one of the Slide Rule forums and new information as to who actually "Made" rather than "Sold" a particular rule all the time. Even the color fades.... > I could conceivably add a Publisher column to the Manual_File table, too > (indicating the publisher of that scan of the manual), but I didn't see the > point. Most textual searches in the online application will be on a join of > Manual and Manual_Artifact (where the Manual table data gets replicated in > the result set for each artifact), so the publisher can be picked up that way. > > JRJ Dave G4UGM
