http://a9.com/-/spec/opensearch/1.1/
http://a9.com/-/spec/opensearchrss/1.0/
http://activitystrea.ms/spec/1.0/
http://backend.userland.com/blogChannelModule
http://backend.userland.com/creativeCommonsRssModule
http://base.google.com/ns/1.0
http://base.google.com/ns/1.0
http://conversationsnetwork.org/rssNamespace-1.0/
http://earth.google.com/kml/2.0
http://earth.google.com/kml/2.1
http://feedsync.org/2007/feedsync
http://gdata.youtube.com/schemas/2007 
http://geourl.org/rss/module/
http://hacks.benhammersley.com/rss/streaming/
http://madskills.com/public/xml/rss/module/trackback/
http://media.tangent.org/rss/1.0/
http://my.netscape.com/rdf/simple/0.9/
http://my.theinfo.org/changed/1.0/rss/
http://ns.opensocial.org/2008/opensocial
http://openid.net/xmlns/1.0
http://portablecontacts.net/ns/1.0
http://postneo.com/icbm
http://purl.org/dc/elements/1.1/
http://purl.org/dc/terms/
http://purl.org/net/rss1.1#
http://purl.org/rss/1.0/
http://purl.org/rss/1.0/modules/aggregation/
http://purl.org/rss/1.0/modules/annotate/
http://purl.org/rss/1.0/modules/company
http://purl.org/rss/1.0/modules/content/
http://purl.org/rss/1.0/modules/email/
http://purl.org/rss/1.0/modules/event/
http://purl.org/rss/1.0/modules/image/
http://purl.org/rss/1.0/modules/link/
http://purl.org/rss/1.0/modules/reference/
http://purl.org/rss/1.0/modules/richequiv/
http://purl.org/rss/1.0/modules/rss091#
http://purl.org/rss/1.0/modules/search/
http://purl.org/rss/1.0/modules/servicestatus/
http://purl.org/rss/1.0/modules/slash/
http://purl.org/rss/1.0/modules/subscription/
http://purl.org/rss/1.0/modules/syndication/
http://purl.org/rss/1.0/modules/taxonomy/
http://purl.org/rss/1.0/modules/threading/
http://purl.org/rss/1.0/modules/wiki/
http://purl.org/syndication/history/1.0
http://purl.org/syndication/thread/1.0
http://rssnamespace.org/feedburner/ext/1.0
http://schemas.google.com/acl/2007 
http://schemas.google.com/codesearch/2006 
http://schemas.google.com/g/2005
http://schemas.google.com/gCal/2005 
http://schemas.google.com/gdata/batchbatch
http://schemas.google.com/photos/2007 
http://schemas.google.com/photos/exif/2007 
http://schemas.google.com/spreadsheets/2006 
http://schemas.google.com/spreadsheets/2006/extended 
http://schemas.xmlsoap.org/soap/envelope/
http://search.yahoo.com/mrss/
http://web.resource.org/cc/
http://webns.net/mvcb/
http://wellformedweb.org/CommentAPI/
http://www.bloglines.com/about/specs/fac-1.0
http://www.georss.org/georss
http://www.itunes.com/dtds/podcast-1.0.dtd
http://www.microsoft.com/schemas/rss/core/2005
http://www.opengis.net/gml
http://www.opengis.net/kml/2.2
http://www.opml.org/spec2
http://www.usemod.com/cgi-bin/mb.pl?ModWiki
http://www.w3.org/1998/Math/MathML
http://www.w3.org/1999/02/22-rdf-syntax-ns#
http://www.w3.org/1999/xhtml
http://www.w3.org/1999/xlink
http://www.w3.org/2000/01/rdf-schema#
http://www.w3.org/2000/svg
http://www.w3.org/2003/01/geo/wgs84_pos#
http://www.w3.org/2005/Atom
http://www.w3.org/2007/app
http://www.w3.org/XML/1998/namespace
http://xmlns.com/foaf/0.1/
urn:atom-extension:indexing
xri://$xrd*($v*2.0)
xri://$xrds