Direction penalties are estimated by getting the name to address
ratio usage for each partial term in the query and computing the
linear regression of that ratio over the entire phrase. Or to put
it in ither words: we try to determine if the terms at the beginning
or the end of the query are more likely to constitute a name.
Direction penalties are currently used only in classic name queries.
All punctuation will be converted to '-'. Soft breaks : may be
added by preprocessors. The break signs are only used during
query analysis and are ignored during import token analysis.
