RDF can be extracted/generated

• Use intelligent “scrapers” or “wrappers” to extract a structure (hence RDF) from a Web page…

• • using conventions in, e.g., class names or meta elements

• … and then generate RDF automatically (e.g., via an XSLT script)

• This is similar to what “microformats” do (without referring to RDF, though)

• • they may not extract RDF but use the data directly instead in Web 2.0 applications, but the application is not all that different
  • other applications may extract it to yield RDF (e.g., RSS1.0)