def flex_term_rows(self):
        """Build a list of flex term rows.

        Returns: list of BPOFlexTerm
        """
        for term in self.xml.select('FlexTerm'):

            yield BPOFlexTerm(
                record_id=self.record_id,
                name=get_text(term, 'FlexTermName'),
                value=get_text(term, 'FlexTermValue'),
            )

    def contributor_rows(self):
        """Build a list of contributor rows.

        Returns: list of BPOContributor
        """
        for contrib in self.xml.select('Contributor'):

            yield BPOContributor(
                record_id=self.record_id,
                role=get_text(contrib, 'ContribRole'),
                last_name=get_text(contrib, 'LastName'),
                middle_name=get_text(contrib, 'MiddleName'),
                first_name=get_text(contrib, 'FirstName'),
                person_name=get_text(contrib, 'PersonName'),
                original_form=get_text(contrib, 'OriginalForm'),
            )

 def module(self):
     """Returns: str
     """
     return get_text(self.xml, 'module')

 def source_library(self):
     """Returns: str
     """
     return get_text(self.xml, 'sourceLibrary')

 def release_date(self):
     """Returns: date
     """
     return parse_8d_date(get_text(self.xml, 'releaseDate'))

 def mcode(self):
     """Returns: str
     """
     return get_text(self.xml, 'mcode')

 def unit(self):
     """Returns: int
     """
     return int(get_text(self.xml, 'unit'))

 def document_id(self):
     """Returns: str
     """
     return get_text(self.xml, 'documentID')

 def author_marc_date(self):
     """Returns: str
     """
     return get_text(self.xml, 'author marcDate')

 def author_death_date(self):
     """Returns: int
     """
     return int(get_text(self.xml, 'author deathDate'))

 def author_marc_name(self):
     """Returns: str
     """
     return get_text(self.xml, 'author marcName')

 def notes(self):
     """Returns: str
     """
     return get_text(self.xml, 'notes')

 def source_library_location(self):
     """ Returns: str
     """
     return get_text(self.xml, 'sourceLibrary libraryLocation')

 def source_library_name(self):
     """ Returns: str
     """
     return get_text(self.xml, 'sourceLibrary libraryName')

 def pub_date_start(self):
     """ Returns: int
     """
     return int(get_text(self.xml, 'pubDate pubDateStart')[:4])

 def publication_place(self):
     """Returns: str
     """
     return get_text(self.xml, 'publicationPlace')

 def total_pages(self):
     """Returns: int
     """
     return int(get_text(self.xml, 'totalPages'))

 def full_title(self):
     """Returns: str
     """
     return get_text(self.xml, 'fullTitle')

 def estc_id(self):
     """Returns: str
     """
     return get_text(self.xml, 'ESTCID')

 def display_title(self):
     """Returns: str
     """
     return get_text(self.xml, 'displayTitle')