'!' <_summary>The default database to use <_description>The name of the default individual database or meta-database to use on a dictionary source. An exclamation mark ("!") means that all the databases present in a dictionary source should be searched 'exact' <_summary>The default search strategy to use <_description>The name of the default search strategy to use on a dictionary source, if available. The default strategy is 'exact', that is match exact words. 'Serif 12' <_summary>The font to be used when printing <_description>The font to be used when printing a definition. 'Default' <_summary>The name of the dictionary source used <_description>The name of the dictionary source used to retrieve the definitions of words.