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.