code: def _indexNameOf(self, tableClass, attrname):
          
          return "axiomidx_%s_v%d_%s" % (tableClass.typeName,
                                         tableClass.schemaVersion,
                                         '_'.join(attrname))
docs: Return the unqualified (ie, no database name) name of the given
          attribute of the given table.
  
          @type tableClass: L{MetaItem}
          @param tableClass: The Python class associated with a table in the
              database.
  
          @param attrname: A sequence of the names of the columns of the
              indicated table which will be included in the named index.
  
          @return: A C{str} giving the name of the index which will index the
              given attributes of the given table.