A common way of expressing a set of keywords or other searchable info is
with the META element. Here's what I consider a good example from one of my
<META name="resource-type" content=document>
<META name="description" content="The ArtMetal Project is a volunteer
venture of a group of metalsmiths and organizations who strive to
discuss and disseminate information concerning various aspects of
working artistically with metal.
ArtMetal is bringing to the Net a main location for the world wide
archiving of metalworking information. We even store individual
artists work for display in the ArtMetal Gallery.">
<META name="keywords" content="art, metal, sculpture, furniture,
jewelry, casting, lighting, designer, gallery, blacksmith, artist,
architect, iron, forging">
<META name="distribution" content=global>
I've seen this type of implementation used on a number of search engines.
As META is extensible and HTML has no other *explicitly stated* method of
including document meta-information, this seems the most likely method,
although others are feasible. This is at least a true HTML 2.0 compatible
(as per the latest draft) method.
 ArtMetal Home Page: http://wuarchive.wustl.edu/edu/arts/metal/ArtMetal.html
Murray M. Altheim, Information Systems Analyst
National Technology Transfer Center, Wheeling, West Virginia