rdf - Resource Description Framework files
RDF files are plain text formatted files which look a lot like HTML.
You can open RDF files with a text editor like TextEdit. RDF files contain descriptions of other files, not the files themselves but links to them.
You can open RDF files with a text editor like TextEdit. RDF files contain descriptions of other files, not the files themselves but links to them.
OReilly about RDF - XML - The Semantic Web
Wikipedia about RDF