Question on WmFlatFile convertToValues service

Wm IS version - 6.5

I’m getting a flat file with no record identifier and I have created a schema for the same. I pass the flat file as bytes to convertToValues service and it generates the xml document. I map the ffvalues output variable to the schema document type, but the @record-id,@delimiters,@segment-id are also populated. Is there any way to suppress these variables from coming out of the convertToValues service call. I have attached the screen shot.