I have heard it say that one is supposed to declare an EAD schema like
more or less so:
<ead xmlns="urn:isbn:1-931666-22-9" xmlns:xlink="http://www.w3.org/1999/xlink"
Supposedly the loc.gov url, rather than a local uri, should be used in
order to discourage institutions from using their home-brewed, ever so
slightly moderated, versions. Can someone confirm that the LOC servers
are capable of handling all the hits that this wil entail? In that case
the real url probably could be published.
Dirk van Laanen