hreflang_url_sxt and hreflang_cc_sxt for http://support.google.com/webmasters/bin/answer.py?hl=de&answer=189077 navigation_url_sxt and navigation_type_sxt for http://googlewebmastercentral.blogspot.de/2011/09/pagination-with-relnext-and-relprev.html publisher_url_s for http://support.google.com/plus/answer/1713826?hl=de all fields are disabled by default and not written to the index.
Michael Peter Christen