The Response information here does not discuss setting up the XML responses, only the JSON responses, however Examples and references to XML are made elsewhere. This would be true for all pages within this section.
Some items that would be good to document for XML:
What should be the starting character sequence for the root path? ‘//’ is used in the examples.
Should the root path end with or without the separator? Will it work both ways or will one fail? (examples show without)
Should Attribute Paths in the Response Mapping start with or without the separator?