| [Atom 0.3 ](/simplepie/simplepie-ng/wiki/Spec:-Atom-0.3) |
http://purl.org/atom/ns# |
| [Atom 1.0 ](/simplepie/simplepie-ng/wiki/Spec:-Atom-1.0) |
http://www.w3.org/2005/Atom |
| [Creative Commons ](/simplepie/simplepie-ng/wiki/Spec:-Creative-Commons-Module) |
http://backend.userland.com/creativeCommonsRssModule, http://cyber.law.harvard.edu/rss/creativeCommonsRssModule.html |
| Dublin Core 1.0 |
http://purl.org/dc/elements/1.0/ |
| [Dublin Core 1.1 ](/simplepie/simplepie-ng/wiki/Spec:-Dublin-Core-1.1) |
http://purl.org/dc/elements/1.1/ |
| Feedburner |
http://rssnamespace.org/feedburner/ext/1.0 |
| FOAF |
http://xmlns.com/foaf/0.1/ |
| [GeoRSS ](/simplepie/simplepie-ng/wiki/Spec:-GeoRSS-(Simple)) |
http://www.georss.org/georss |
| GML |
http://www.opengis.net/gml |
| [iTunes Podcast RSS ](/simplepie/simplepie-ng/wiki/Spec:-iTunes-Podcast-RSS) |
http://www.itunes.com/dtds/podcast-1.0.dtd |
| [MediaRSS ](/simplepie/simplepie-ng/wiki/Spec:-Media-RSS) |
http://search.yahoo.com/mrss/, http://search.yahoo.com/mrss, http://video.search.yahoo.com/mrss, http://video.search.yahoo.com/mrss/ |
| Podlove Simple Chapters |
https://podlove.org/simple-chapters/ |
| RDF |
http://www.w3.org/1999/02/22-rdf-syntax-ns# |
| [RSS 0.90 ](/simplepie/simplepie-ng/wiki/Spec:-RSS-0.9-(Netscape)) |
http://my.netscape.com/rdf/simple/0.9/ |
| RSS 0.91 (Netscape), RSS 0.91 (Userland), RSS 0.92, RSS 0.93 |
(blank) |
| [RSS 1.0 ](/simplepie/simplepie-ng/wiki/Spec:-RSS-1.0) |
http://purl.org/rss/1.0/ |
| [RSS 1.0 Modules: Content ](/simplepie/simplepie-ng/wiki/Spec:-RSS-1.0-Content-Modules) |
http://purl.org/rss/1.0/modules/content/ |
| [RSS 1.0 Modules: Slash ](/simplepie/simplepie-ng/wiki/Spec:-RSS-1.0-Slash-Modules) |
http://purl.org/rss/1.0/modules/slash/ |
| [RSS 1.0 Modules: Syndication ](/simplepie/simplepie-ng/wiki/Spec:-RSS-1.0-Syndication-Modules) |
http://purl.org/rss/1.0/modules/syndication/ |
| [RSS 2.0 ](/simplepie/simplepie-ng/wiki/Spec:-RSS-2.0) |
(blank) |
| [Trackback ](/simplepie/simplepie-ng/wiki/Spec:-Trackback) |
http://madskills.com/public/xml/rss/module/trackback/ |
| W3C Annotea Annotation Schema |
https://www.w3.org/2000/10/annotation-ns# |
| W3C Simple Knowledge Organization System (SKOS) |
http://www.w3.org/2004/02/skos/core# |
| [W3C WGS84 Geo ](/simplepie/simplepie-ng/wiki/Spec:-W3C-WGS84-Geo) |
http://www.w3.org/2003/01/geo/wgs84_pos# |
| [Well-Formed Web ](/simplepie/simplepie-ng/wiki/Spec:-Well-Formed-Web) |
http://wellformedweb.org/CommentAPI/ |
| XHTML |
http://www.w3.org/1999/xhtml |
| XML |
http://www.w3.org/XML/1998/namespace |