This is the advanced search page for Yahoo . This comes close to the kind of control experienced with the UW libraries' catalogue system . Engines based on following hypertext links . But since it exists in a hypertext environment, these engines pull in linked documents and check them as well. Unfortunately, many of them are off the subject or obscure uses of your search terms.
Some examples are . . .
Note here the use of WAIS-style points ranking the quality of the search hits. Note that this engine relies on simplicity. Try it out and see if it is efficient. Read more information on this interesting sub-species of Web search engines . The results are sorted and combined, with major redundancies eliminated or collapsed.