cd.attlist.OMS |= 
  attribute cd {string "mathmltypes" },
  attribute name {
    string "type" |
    string "integer_type" |
    string "real_type" |
    string "rational_type" |
    string "complex_cartesian_type" |
    string "complex_polar_type" |
    string "constant_type" |
    string "vector_type" |
    string "list_type" |
    string "set_type" |
    string "matrix_type" |
    string "fn_type" }