Mutation testing on XML?

["Costello, Roger L." <costello@mitre.org>]

Hi Folks,

	Mutation analysis and testing can be applied
 	to design models, specifications, databases,
 	tests, XML, and other types of software
 	artifacts, although program mutation is the
 	most common. [1]

Have you done mutation testing on XML? If yes, would you describe how you did it, please?

/Roger

[1] https://en.wikipedia.org/wiki/Mutation_testing#Introduction