PBS XML Schema Version 3.1.9
      
      Pattern db.baseform.attribute
      Defined in PBS XML Schema grammar.
      This pattern may contain:
      Optionally:
      
         
         Specifies the base form of the term, the one that appears in the glossary. This allows
         adjectival, plural, and other variations of the term to appear in the element. The
         element content is the default base form.