cd.attlist.OMS |= 
  attribute cd {string "arith1" },
  attribute name {
    string "lcm" |
    string "gcd" |
    string "plus" |
    string "unary_minus" |
    string "minus" |
    string "times" |
    string "divide" |
    string "power" |
    string "abs" |
    string "root" |
    string "sum" |
    string "product" }