Structure-based browsing has been in vogue in the hypertext
community for several years. Many results from this area are
directly relevant to information browsing in audio. Notable
among these is the work in defining Hypertext Markup Language
(HTML), a hypertext analogue to SGML. The World-Wide Web (WWW),
an HTML-based hypertext information retrieval system is widely
used on the Internet. WWW browsers allow a user to quickly
access a wide variety of information sources. The Webb
currently contains textual as well as audio and video
resources. At present, only primitive browsing of audio/video
data is possible, since there is very little structure
available in digitized audio/video data.