Boolean operators are used to connect and define the relationship between your search
terms in eHRAF. You will find radio buttons for the operators AND, OR, and NOT separating
the different sections or clauses in the search form. Always double-check the radio buttons
before searching. Selecting the incorrect operator for your search can severely limit or
expand your results. Choosing AND will narrow your search because it requires that all of
the terms entered are present at the same time in the search results, while OR will expand
the results to include matches for any one clause or keyword at a time.