OAI-PMH.md

 **About**
 - Harvester is based on Ed Summers Harvester 1.20 (see cpan)
 - this version allows the non standard content type application/xml (standard is text/xml)
-- DC extended with attribute xml:lang="eng" in any DC-element
+- DC extended with attribute xml:lang="XXX" in any DC-element
 - A handler for LOM (Learning Object Model)