code: def records():
      
      import pkg_resources
      import uuid
      from dojson.contrib.marc21 import marc21
      from dojson.contrib.marc21.utils import create_record, split_blob
      from invenio_pidstore import current_pidstore
      from invenio_records.api import Record
  
      # pkg resources the demodata
      data_path = pkg_resources.resource_filename(
          'invenio_records', 'data/marc21/bibliographic.xml'
      )
      with open(data_path) as source:
          indexer = RecordIndexer()
          with db.session.begin_nested():
              for index, data in enumerate(split_blob(source.read()), start=1):
                  # create uuid
                  rec_uuid = uuid.uuid4()
                  # do translate
                  record = marc21.do(create_record(data))
                  # create PID
                  current_pidstore.minters['recid'](
                      rec_uuid, record
                  )
                  # create record
                  indexer.index(Record.create(record, id_=rec_uuid))
          db.session.commit()
docs: Load records.