@journals.over('<STR_LIT>', '<STR_LIT>')<EOL>def proceedings(self, key, value):
proceedings = self.get('<STR_LIT>')<EOL>refereed = self.get('<STR_LIT>')<EOL>if not proceedings:<EOL><INDENT>normalized_a_values = [el.upper() for el in force_list(value.get('<STR_LIT:a>'))]<EOL>if '<STR_LIT>' in normalized_a_values:<EOL><INDENT>proceedings = True<EOL><DEDENT><DEDENT>if not refereed:<EOL><INDENT>normalized_a_values = [el.upper() for el in force_list(value.get('<STR_LIT:a>'))]<EOL>if '<STR_LIT>' in normalized_a_values:<EOL><INDENT>refereed = True<EOL><DEDENT>elif '<STR_LIT>' in normalized_a_values:<EOL><INDENT>refereed = False<EOL><DEDENT><DEDENT>self['<STR_LIT>'] = refereed<EOL>return proceedings<EOL>
Populate the ``proceedings`` key.

    Also populates the ``refereed`` key through side effects.