On Wed, Feb 11, 2009 at 07:19:06AM -0500, John Preston wrote:
> The federation that I'm thinking of is for searching.

Note that this is a special case of the more general problem:  my
institution or consortium operates a number of different digital
document repositories of various types, and I need to make it possible
to search across them all with (from the user's POV) one query.
Sounds like what SRU was made for.  I hope so, because that's what
I've been considering to meet a similar requirement.  There's not even
a plan yet, though, let alone code.

> It would be nice for any of the DSpace instances to auto magically
> discover who belongs to the federation and should be searched.

Have each register itself in some sort of directory service.  The
search front-end can then first search the directory to discover
participating repositories, or just walk the membership of a group or
the content of a single container if you want to have multiple
repository 'cliques'.

-- 
Mark H. Wood, Lead System Programmer   [email protected]
Friends don't let friends publish revisable-form documents.

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