default behavior is inherited and it displays a RecipeOp assuming there are no children
to display.
default behavior is inherited and it displays a RecipeOp assuming there are no children
to display. Override and make it call one of the above toXML methods if
there are children to display.
Returns the local part of the name of $arg as an xs:string that will either be the zero-length string or will have the lexical form of an xs:NCName