Thanks Ben!  I tried ?rev=1, but didn't it didn't occur to me that the
history mode would work.

On closer inspection, I actually did find this information in the dump in
the source_records field e.g.

"source_records": [
  "marc:marc_records_scriblio_net/part28.dat:62741961:1376",
  "marc:marc_loc_updates/v36.i33.records.utf8:3020091:1375"
]

for http://openlibrary.org/books/OL100043M.json

I think that will provide enough information to do a tally.  The first
source record matches the source listed in the initial import.  I'm not
sure what the second source record is since I don't see it referenced in
the change history http://openlibrary.org/books/OL100043M.json?m=history

Thanks for setting me on the right path!

Tom

On Wed, Mar 6, 2013 at 2:22 PM, Ben Companjen <[email protected]>wrote:

> Hi Tom,
>
> By replacing the title in the URL with ".json", which gives [0], I got
> the JSON view of the history. This is the "History API" [1]. It looks
> like there is a record for each revision, that stores modification
> date and comment, amongst other things. The first revision has
> "machine_comment": "bpl_marc/bpl114.mrc:36416736:831". I assume this
> is the (only) place where source record links are stored (i.e. in
> metarecords linked to normal records).
>
> I haven't looked at a complete dump with all revisions, but if you say
> there is no history information included, I trust that that
> information is not in the dump. I'm unaware of other dumps that could
> include it.
>
> Perhaps the information can more easily be extracted from the database
> underneath Infogami?
>
> Ben
>
> [0] http://openlibrary.org/books/OL13446224M.json?m=history
> [1] http://openlibrary.org/dev/docs/restful_api#history
>
> On 6 March 2013 19:45, Tom Morris <[email protected]> wrote:
> > If I look at the history for an edition, I can see the source MARC record
> > and the contributor of that record associated with rev 1 of the history.
> >
> >
> http://openlibrary.org/books/OL13446224M/The_history_of_the_Yorubas?m=history
> >
> > For the above record, the links are to:
> >
> > http://openlibrary.org/show-records/bpl_marc/bpl114.mrc:36416736:831
> > http://archive.org/details/bpl_marc
> >
> > Where is this information stored?  Is it available in the dump? (not as
> far
> > as I can see)
> >
> > Also, while investigating this, I thought perhaps the recentchanges API
> > might have the info (can't really tell), but it doesn't seem that the
> data
> > that backs that API is available in dump form.  Is that correct?  Is it
> > intentional?
> >
> > I'd like to use this information to figure out which are the largest
> sources
> > of data to help prioritize vetting efforts.
> >
> > Tom
> >
> > _______________________________________________
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