The new 2nd ed. of the MARC Record Guide for Monograph Aggregator Vendors is now available at: http://www.loc.gov/catdir/pcc/sca/FinalVendorGuide.pdf
The Provider-Neutral E-Monograph MARC Record Guide was approved by the Program for Cooperative Cataloging and OCLC in 2009. The provider-neutral record is defined as a single bibliographic record that covers all equivalent manifestations of an online monograph. Manifestations are considered equivalent if their format and their content are essentially the same, based on clues from the author, title, edition, publishing information, and physical description. Moving to the provider-neutral model puts the emphasis on the content of the resource. Other information such as individual database names, individual e-package names, publishers or third party aggregators that had formerly been entered into the bibliographic records to distinguish different versions should be coded only in appropriate fields in the local version of the record following this guide.
(from George Prager's message on TS-SIS list)