http://the.oa.org oai:r2.org:klik001 2002-01-01 http://www.openarchives.org/OAI/2.0/oai_dc/ http://some.oa.org oai:r2.org:klik001 2001-01-01 http://www.openarchives.org/OAI/2.0/oai_dc/