With this parameters you can configure how the XML source of the whole WSDL file is reproduced.

It is generated as a part of the documentation with the XML markup highlighted with special colors and the values of some XML attributes hyperlinked to the related sections of the documentation.

The reproduced XML source may be published as a separate HTML page (in case of framed HTML) or separate block (in case of single-file HTML/RTF), or it may be included in as the last section in the WSDL File Overview page/block. That is controlled by the nested parameter:

Although the reproduced XML source closely replicates the real one, it may be slightly different. For instance, ordering of XML attribute may be not the same. Additionally, <wsdl:documentation> and <xs:annotation> elements may be intentionally omitted, which is controlled by the nested parameters: Nested Parameters:
Control how the reproduced XML source will look, where it is placed and what it will include.
See Also:
"Generate Details | WSDL Files | XML Source" parameter, which controls whether the full WSDL file source is reproduced.