I've posted the revised version of the Feed ranking draft updated to reflect the recent conversations. This is a major update.
http://www.ietf.org/internet-drafts/draft-snell-atompub-feed-index-03.txt Sample: <feed> ... <r:ranking-scheme domain="urn:my-ranking-domain" label="My Five Star Ranking" significance="ascending" precision="1" min-value="0.0" max-value="5.0" /> <r:ranking-scheme label="Entry Order" significance="ascending" min-value="0" /> <entry> ... <r:rank>1</r:rank> <!-- "Entry Order" --> <r:rank domain="urn:my-ranking-domain">4.5</r:rank> </entry> <entry> ... <r:rank>3</r:rank> <!-- "Entry Order" --> <r:rank domain="urn:my-ranking-domain">3.0</r:rank> </entry> <entry> ... <r:rank>2</r:rank> <!-- "Entry Order" --> <r:rank domain="urn:my-ranking-domain">5.0</r:rank> </entry> </feed>