You may combine search words with OR, AND and
NOT. AND-expressions are evaluated before OR-expressions.
For instance the search expression aa AND bb OR cc
will find all documents containing both aa and bb, plus all
documents containing cc. You may also write this as (
aa AND bb ) OR cc.
The search expression aa OR bb AND NOT cc will
find all documents containing bb and that does not contain
cc, plus all documents containing aa. You may also write this
as aa OR (bb AND (NOT cc)).
You can search for partial words by truncating them with
*, for instance aa* will match all words beginning
with aa. If you only use * or nothing as search
expression, you get all documents from the chosen information
sources between the specified dates.
Some small words like "a", "on", "for",
"the", etc., are removed from the search wordlist.
You can change the date fields to optimize your search. It is
also possible to search in many information bases at the same
time.
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