I am currently plowing through the Wayback Machine to look for obsolete syndication formats. This page is just here to list a lot of links that I still need to check out, maybe to get even more specs in this wiki.

• Open Content Specification
• RSS 3.0
• RSS 1.0 proposed modules
• Epistula Syndication Format
• eXchangeable Faceted Metadata Language
• Japanese internet software of the 2000s: a Markdown document I’m using to list the huge mess of Japanese syndication and blogging before they settled for international standards

XML namespaces

Various namespaces that can be found mostly on RSS/Atom feeds, and that I want to look into at a little bit more. I’ll probably post about those on RSRSSS.

• Feed Access Control 1.0
  xmlns:access="http://www.bloglines.com/about/specs/fac-1.0"
• RSS 1.0 Administrative Module
  xmlns:admin="http://webns.net/mvcb/"
• RSS 1.0 Aggregation Module
  xmlns:ag="http://purl.org/rss/1.0/modules/aggregation/"
• RSS 1.0 Annotation Module
  xmlns:annotate="http://purl.org/rss/1.0/modules/annotate/"
• Atom Publishing Protocol
  xmlns:app="http://www.w3.org/2007/app"
• RFC 6721
  xmlns:at="http://purl.org/atompub/tombstones/1.0"
• RSS 1.0 Audio Module
  xmlns:audio="http://media.tangent.org/rss/1.0/"
• blogChannel RSS Module
  xmlns:blogChannel="http://backend.userland.com/blogChannelModule"
• Blogger
  xmlns:blogger="http://schemas.google.com/blogger/2008"
• Creative Commons RDF
  xmlns:cc="http://web.resource.org/cc/"
• Microsoft Simple List Extensions
  xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005"
• RSS 1.0 Company Module
  xmlns:company="http://purl.org/rss/1.0/modules/company"
• RSS 1.0 Content Module
  xmlns:content="http://purl.org/rss/1.0/modules/content/"
• The Conversations Network
  xmlns:conversationsNetwork="http://conversationsnetwork.org/rssNamespace-1.0/"
• RSS 1.0 changedPage Module
  xmlns:cp="http://my.theinfo.org/changed/1.0/rss/"
• creativeCommons RSS Module
  xmlns:creativeCommons="http://backend.userland.com/creativeCommonsRssModule"
• Dublin Core
  xmlns:dc="http://purl.org/dc/elements/1.1/"
• Dublin Core Metadata Terms
  xmlns:dcterms="http://purl.org/dc/terms/1.1/"
• Dailymotion RSS
  xmlns:dm="http://www.dailymotion.com/dmrss/"
• RSS 1.0 Email Module
  xmlns:email="http://purl.org/rss/1.0/modules/email/"
• Easy News Topics RSS 2.0 Module
  xmlns:ent="http://www.purl.org/NET/ENT/1.0/"
• RSS 1.0 Event Module
  xmlns:ev="http://purl.org/rss/1.0/modules/event/"
• FeedBurner extensions (origLink and origEnclosureLink)
  xmlns:feedburner="http://rssnamespace.org/feedburner/ext/1.0"
• FeedPress
  xmlns:feedpress="https://feedpress.com/xmlns/"
• RFC 5005
  xmlns:fh="http://purl.org/syndication/history/1.0"
• FOAF 0.1
  xmlns:foaf="http://xmlns.com/foaf/0.1/"
• Google Merchant Center product feed
  xmlns:g="http://base.google.com/ns/1.0"
• Google Data
  xmlns:gd="http://schemas.google.com/g/2005"
• Basic Geo Vocabulary
  xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#"
• GeoRSS
  xmlns:georss="http://www.georss.org/georss"
• GeoURL
  xmlns:geourl="http://geourl.org/rss/module/"
• Geography Markup Language
  xmlns:gml="http://www.opengis.net/gml"
• Google Play Podcasts
  xmlns:googleplay="https://www.google.com/schemas/play-podcasts/1.0/"
• Google KML 2.2 extensions
  xmlns:gx="http://www.google.com/kml/ext/2.2"
• ICBM RSS Module
  xmlns:icbm="http://postneo.com/icbm"
• RSS 1.0 Image Module
  xmlns:image="http://purl.org/rss/1.0/modules/image/"
• includedComments RSS Module
  xmlns:includedComments="http://www.laudably.com/rss2-comments"
• LiveJournal indexing extension
  xmlns:indexing="urn:atom-extension:indexing"
• Apple iTunes Podcast RSS extensions
  xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd"
• Keyhole Markup Language 2.0
  xmlns:kml20="http://earth.google.com/kml/2.0"
• Keyhole Markup Language 2.1
  xmlns:kml21="http://earth.google.com/kml/2.1"
• Keyhole Markup Language 2.2
  xmlns:kml22="http://www.opengis.net/kml/2.2"
• RSS 1.0 Link Module
  xmlns:l="http://purl.org/rss/1.0/modules/link/"
• Windows Live Spaces
  xmlns:live="http://schemas.microsoft.com/live/spaces/2006/rss"
• MathML
  xmlns:mathml="http://www.w3.org/1998/Math/MathML"
• MediaRSS
  xmlns:media="http://search.yahoo.com/mrss/"
• MSDN
  xmlns:msdn="http://msdn.microsoft.com/aboutmsdn/rss/"
• MSDN Domains
  xmlns:msdn="http://msdn.microsoft.com/aboutmsdn/rss/domains"
• MSN Spaces
  xmlns:msn="http://schemas.microsoft.com/msn/spaces/2005/rss"
• OpenGraph
  xmlns:og="http://ogp.me/ns#"
• OpenID Authentication 2.0 extension for XRDS
  xmlns:openid="http://openid.net/xmlns/1.0"
• OpenSearch
  xmlns:opensearch="http://a9.com/-/spec/opensearch/1.1/"
• OpenSearch RSS 1.0
  xmlns:opensearch10="http://a9.com/-/spec/opensearchrss/1.0/"
• RawVoice RSS
  xmlns:rawvoice="http://www.rawvoice.com/rawvoiceRssModule/"
• Atom Ranking Extensions
  xmlns:re="http://purl.org/atompub/rank/1.0"
• RSS 1.0 Reference Module
  xmlns:ref="http://purl.org/rss/1.0/modules/reference/"
• RSS 1.0 Rich Equivalents Module
  xmlns:reqv="http://purl.org/rss/1.0/modules/richequiv/"
• Resources of a Resource 0.1
  xmlns:ror="http://rorweb.com/0.1/"
• Review Module 0.2
  xmlns:rvw="http://purl.org/NET/RVW/0.2/"
• RSS 1.0 Search Module
  xmlns:search="http://purl.org/rss/1.0/modules/search/"
• SimpleGallery for DotNetNuke
  xmlns:simplegallery="http://www.example.com/simplegallery"
• Semantically-Interlinked Online Communities Core
  xmlns:sioc="http://rdfs.org/sioc/ns#"
• Semantically-Interlinked Online Communities Types Module
  xmlns:sioct="http://rdfs.org/sioc/types#"
• Simple Knowledge Organization System
  xmlns:skos="http://www.w3.org/2004/02/skos/core#"
• RSS 1.0 Slash Module
  xmlns:slash="http://purl.org/rss/1.0/modules/slash/"
• Scripting.com Source namespace
  xmlns:source="http://source.scripting.com/"
• RSS 1.0 Service Status Module
  xmlns:ss="http://purl.org/rss/1.0/modules/servicestatus/"
• RSS 2.0 Simple Semantic Resolution
  xmlns:ssr="http://purl.org/stuff/ssr"
• RSS 1.0 Streaming Module
  xmlns:str="http://hacks.benhammersley.com/rss/streaming/"
• RSS 1.0 Subscription Module
  xmlns:sub="http://purl.org/rss/1.0/modules/subscription/"
• FeedSync
  xmlns:sx="http://feedsync.org/2007/feedsync"
• Microsoft Simple Sharing Extensions
  xmlns:sx="https://www.microsoft.com/schemas/sse"
• RSS 1.0 Syndication Module
  xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
• RSS 1.0 Taxonomy Module
  xmlns:taxo="http://purl.org/rss/1.0/modules/taxonomy/"
• RSS 1.0 Threading Module
  xmlns:thr="http://purl.org/rss/1.0/modules/threading/"
• RFC 4685
  xmlns:thr="http://purl.org/syndication/thread/1.0"
• MovableType TrackBack
  xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/"
• RSS-TV
  xmlns:tv="http://www.rss-tv.org/rss/tv1.0"
• Webfeeds
  xmlns:webfeeds="http://webfeeds.org/rss/1.0"
• Well-formed Web Comment API
  xmlns:wfw="http://wellformedweb.org/CommentAPI/"
• RSS 1.0 Wiki Module
  xmlns:wiki="http://purl.org/rss/1.0/modules/wiki/"
• XML Linking Language (XLink)
  xmlns:xlink="http://www.w3.org/1999/xlink"
• Yahoo! Weather extensions
  xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0"