XMLAttribute
Map a BDL simple data type to an XML Attribute.
Note: 
- The attribute cannot be set on a type definition.
 - The attribute can only be set on a RECORD's member.
 
Example
DEFINE myVar RECORD ATTRIBUTES(XMLName="Root")
  val1 INTEGER ATTRIBUTES(XMLAttribute,XSDunsignedShort,XMLName="Val1"),
  rec  RECORD ATTRIBUTES(XMLName="Rec1")
    val2  FLOAT ATTRIBUTES(XMLAttribute,XMLName="Val2"),
    val3  STRING ATTRIBUTES(XMLElement,XMLName="Val3")
  END RECORD
END RECORD
<Root Val1="148">
  <Rec1 Val2="25.8">
    <Val3>Hello world</Val3>
  </Rec1>
</Root>