Sam Hunting is president of eTopicality, Inc., a consultancy whose service offerings include topic map development, content analysis, and schema development. He was a founding member of TopicMaps.Org, which developed the XML Topic Maps (XTM) specification. He is a co-author of the XTM 1.0 DTD. He is a co-author of the draft Reference Model for Topic Maps (ISO 13250). He is the technical editor of XML Topic Maps: Creating and Maintaining Topic Maps for the Web, from Addison-Wesley. He is a co-founder of the GooseWorks project for creating open source topic map tools. He has been working with markup technology for over 10 years.    (APA)