I saw the announcement about LCCN permalink. But surfing around I then noticed that there were XML versions of the MARC codelists including language codes, country codes and geographic area codes. No relators and sources yet. This is terribly handy if your application needs up to date codelist or you are trying to process MARC files and need to translate dcu to Washington, D. C.
Thanks LC. Lets keep putting more things out there!
schenizzle 