Format
object is used to provide information on how a generated XML document should be structured. The information provided tells the formatter whether an XML prolog is required and the number of spaces that should be used for indenting. The prolog specified will be written directly before the XML document. Should a Format
be created with an indent of zero or less then no indentation is done, and the generated XML will be on the same line. The prolog can contain any legal XML heading, which can domain a DTD declaration and XML comments if required.