Firefox add-ons Semantic Radar and Operator show you the metadata

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      Where is the Semantic Web located? It may be hiding in that Web page you’ve just browsed.

      If you use Mozilla Firefox, installing the Semantic Radar add-on will tell you if you’re looking at structured data.

      This software extension, developed by the Semantically-Interlinked Online Communities project, detects whether a page contains data embedded with RDFa or is linked to a separate RDF metadata file. It lets you know by displaying icons in the status bar.

      Another Firefox add-on, Mozilla Labs’ Operator, shows you when microformats (semantic markup in HTML) are present.

      To try out these add-ons, load up anyone’s profile on the microblogging site.

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