are there any examples of functioning OpenSearch interfaces to library
catalogs or library information systems?
I'm specifically interested in those that not only advertise a text/html
interface to their catalog, but who include OpenSearch response elements.
One example I've found is Evergreen; though it's not clear to what extent
this interface is used or implemented. For instance, their demo
installation's OpenSearch description advertises an ATOM feed, but what's
returned doesn't validate. (*)
Are there other examples deployed (and does anybody know applications that
consume OpenSearch feeds?)
(*) See, for instance:
which is not a valid ATOM feed: