From Site5Wiki

Contents 1 Resources 1.1 Troubleshooting 1.1.1 Validation

Resource Description Framework (RDF)

A recommendation from the W3C for creating meta-data structures that define data on the Web. It is designed to provide a method for classification of data on Web sites in order to improve searching and navigation (see Semantic Web).

— answers.com

• List of content syndication markup languages
  

[edit] Resources

• RAP: RDF API for PHP —

  RAP is a software package for parsing, querying, manipulating, serializing and serving RDF models.

  • Introduction
  • Documentation
    • RAP PHPDoc
  • Mailing lists

[edit] Troubleshooting

The problem might be your actual header call to your feed link, not the feed itself:

RSS feeds should be served as application/rss+xml (RSS 1.0 is an RDF format, so it may be served as application/rdf+xml instead). Atom feeds should use application/atom+xml. Alternatively, for compatibility with widely-deployed web browsers, any of these feeds can use one of the more general XML types — preferably application/xml.

— Feedvalidator.org

[edit] Validation

• W3C RDF Validator
• Feedvalidator

---

answers/RDF	technorati/tag/RDF; technorati/posts/tag/RDF
ma.gnolia.com/tags/RDF	del.icio.us/popular/RDF
flickr/tags/RDF: most interesting; tag clusters for RDF; Flickr groups related to RDF	Google/RDF; GoogleBlogs search for RDF; Google CodeSearch for RDF
O'Reilly/RDF
reddedit/RDF	digg/RDF
furl/RDF	items tagged RDF at SWIK
jaiku/RDF	twitter/RDF

---

Related wiki links: Atom; Feeds; KML; OPML; FOAF; RSS; XFN; XHTML; XML