By Conal Tuohy
“Visualizing Government Archives through Linked Data” blog post (includes links to source code) about an automated gateway which harvests from an OAI-PMH repository, transforms the harvested records into RDF/XML using an XSLT, and deposits the resulting RDF graphs into a SPARQL Graph Store.
http://conaltuohy.com/blog/visualizing-government-archives-through-linked-data/