<DocumentDefinition>
  <name>_test_doc_read_blob_validation</name>
  
  <blob_element><name>data_blob</name></blob_element>
  <required>'data_blob'</required>

  <store>
    <name>main</name>
    <base>test/blob_read_validation</base>
    <location>Sequential_file:'extension','.doctest'</location>
  </store>
</DocumentDefinition>