Rectangular Callout: Mar. 1996 - SHOE 0.90 (simple frames in HTML) Rectangular Callout: Jan. 1998 –SHOE 1.0 (frames + Horn logic) Rectangular Callout: Feb. 1998 – XML (semi-structured data for Web) Rectangular Callout: Sep. 1998 – Berners-Lee’s Semantic Web Roadmap Rectangular Callout: Feb. 1999 –RDF (semantic nets in XML) Rectangular Callout: Mar. 2001 – DAML+OIL (expressive DL in RDF) Rectangular Callout: May 2001 – Berners-Lee et al. Scientific American article Rectangular Callout: June. 2002 – 1st Int’l Semantic Web Conference Rectangular Callout: Feb. 2004 – OWL (W3C Rec.)

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