RDF feed refers to data feed in RDF

Resource Description Framework

The Resource Description Framework is a family of World Wide Web Consortium specifications originally designed as a metadata data model...

 (and maybe a little bit of OWL

Web Ontology Language

The Web Ontology Language is a family of knowledge representation languages for authoring ontologies.The languages are characterised by formal semantics and RDF/XML-based serializations for the Semantic Web...

) format. RDF is an emerging semantic web standard language ideal for describing real world objects, and the resulted RDF data resources can be consumed by computers (i.e. machine-readable). Theoretically, every web site can create RDF resources for all the information on the web site and make them available as RDF feeds. Any other web sites, if interested, can then acquire the data from the RDF feeds and integrate them with other data obtained in the same fashion. This so-called "web of data" or semantic web

Semantic Web

The Semantic Web is a collaborative movement led by the World Wide Web Consortium that promotes common formats for data on the World Wide Web. By encouraging the inclusion of semantic content in web pages, the Semantic Web aims at converting the current web of unstructured documents into a "web of...

 will open doors to a great number of new services that are not possible today. Of course, this sounds just like a dream. But, lots of people are working hard to make it a reality. W3C is leading the way followed by a large number of volunteers. For example, web2express.org launched a free online data feed service in October 2007 for anyone to create RDF feeds and RDF data resources.

Examples

• RSS 1.0 feeds for news or blogs.
• RDF feeds for products, news, events, jobs, and studies.

Free or open-source tools/services

• W3C RDF validation
• Ufeed: A free online tool for publishing data resources and data feeds in RDF, including product information, news, events, jobs and studies.