alter_table(:assessment_rlshp) do
      add_foreign_key([:assessment_id], :assessment, :key => :id)
      add_foreign_key([:accession_id], :accession, :key => :id)
      add_foreign_key([:resource_id], :resource, :key => :id)
      add_foreign_key([:archival_object_id], :archival_object, :key => :id)