* Typical base relations include the usual six ordering relations
* (<TT><=</TT>, <TT>></TT>, <I>etc.</I>), the text
* relations <TT>any</TT>, <TT>all</TT> and <TT>exact</TT>, the
* Typical base relations include the usual six ordering relations
* (<TT><=</TT>, <TT>></TT>, <I>etc.</I>), the text
* relations <TT>any</TT>, <TT>all</TT> and <TT>exact</TT>, the