operator
attribute-declaration with the specified value and default type.
    create-attribute-declaration attribute-value-declaration
                     default attribute-default-declaration
             (case-sensitive switch-expression)?
    
 This operator creates an attribute-declaration that corresponds to its supplied arguments. The
        case-sensitive argument determines the method of validation that will be performed on attribute
        values when the new declaration is used by create-specified-attribute, and is true by
        default.