I'm surprised the Online Archive of California hasn't come up yet:
See, for example:
They have been doing this for quite some time, and I would consider it a
"reference" implementation of this kind of thing.
On Tue, Jan 14, 2014 at 8:47 AM, Kyle Banerjee <[log in to unmask]>wrote:
> Archive Engine West http://hero.village.virginia.edu/nwda/ includes EAD
> with direct links to digital content as well as a way to search digital
> content directly that links back to finding aids.
> If you want a quick example of a search that illustrates the process, just
> type in "lovejoy." This brings up a number of items from the Esther Pohl
> Lovejoy Papers. When you click on the collection, you can see all the items
> in the collection.
> Or just type in any search. On the left in the list of facets, you can
> limit by collection (i.e. EAD, repository, or whatever).
> Note that this tool indexes digital content that is not necessarily
> associated with a finding aid.
> On Tue, Jan 14, 2014 at 7:38 AM, Edward Summers <[log in to unmask]> wrote:
> > Hi all,
> > I was wondering if anyone can point me at example(s) of finding aids
> > (either EAD XML or HTML) that are linked to digital object of some kind.
> > For example a container list that links to a digital image that is
> > available on the Web.
> > Iím doing a bit of an informal survey so if you see someone has
> > but you have a different example please send it along either here on list
> > or to me directly.
> > Thanks!
> > //Ed
> > PS. sorry for the duplication.