Eric Freese, Kal Ahmed, Jack Park, and Sam Hunting
A specific goal of this book is to bring technology to the users. This chapter briefly reminds readers that there exist numerous commercial sources of topic map software—four of which, listed below, have been sponsors of TopicMaps.Org (http://www.topicmaps.org), the group that created the XTM specification. We expect more vendors to appear in the future.
We soon turn to the discussion of four open source projects. This chapter is thus a composite of project discussions by four authors: Eric Freese, Kal Ahmed, Jack Park, ...