Good search engines functionnalities for relevant and quick search results

[Stéphane Dudart]

Dear list,

We would like to place a search engine on our website. This one has a lot of
html files and it grows day by
day. We are currently establish a keyword and description metadata system to
the site to control
searching.
What functionnalities search engines must have for a quick search and a
relevant result?
We also look for case studies and local search engine lists.

Thank you for your help

Stéphane D.